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Manual Cables to Go CDM-570

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  • Cables to Go CDM-570 - page 1

    Vipersat CDM-570/570L Satellite Network Modem Router User Guide Part Number 22125 Revision 2.0 ...

  • Cables to Go CDM-570 - page 2

    ...

  • Cables to Go CDM-570 - page 3

    Vipersat CDM-570/570L Version 1.5.3 User Guide May 12, 2006 Part number 22 125 Document Revision 2.0 Firmware Vers ion 1.5.3 ...

  • Cables to Go CDM-570 - page 4

    Comtech VIPERSAT Networks, Inc. 3215 Skyway Court Fremont, CA 94539 USA Phone: (510) 252-1462 Fax: (510) 252-1695 www.vipersat.com Part Number 22125 Manual Revision 2.0 Firmware Version 1.5.3 ©2006 by Comtech VIPERSAT Networks, Inc. All rights reserved. No part of this manual may be copied or reproduced without prior written permission of Comtech ...

  • Cables to Go CDM-570 - page 5

    Document Revision Status The information contained in this document is subject to change without notice or obligation. Although CVNI has made every effort to verify the content of this document, CVNI assumes no responsibility for liability due to errors that may appear in this document. Document Revision Date Description Affected Pages Rev. 1.0 10/ ...

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    i General How to Use This Manual . . . . . . . . . . . 1-1 Manual Organization . . . . . . . . . . . . 1- 1 Chapter 1 — General . . . . . . . . . 1-1 Chapter 2 — Quick Start Co nfiguration 1-1 Chapter 3 — Using the Command Line Interface (CLI) . . . . . . . . . . . . 1-2 Appendix A — Network Addressing . . 1-2 Appendix B — Automatic Switc ...

  • Cables to Go CDM-570 - page 8

    ii Vipersat CDM-570/570L User Guide Slot S tart in Cycle . . . . . . . . . . . 3-15 Set Remotes . . . . . . . . . . . . . . 3-15 Adding a Remote to the STDMA Group . 3-15 Base . . . . . . . . . . . . . . . . . 3-16 Remote Count . . . . . . . . . . . . 3-17 Set Remote Policies . . . . . . . . . 3-17 Delete Remote . . . . . . . . . . . . 3-19 Enable/ ...

  • Cables to Go CDM-570 - page 9

    iii Load Switching . . . . . . . . . . . . . . . . B-2 Bandwidth Allocation and Load Switching by the STDMA Controller: . . . . . . . . . B-2 Load Switching Process . . . . . . . . . B-6 Load Switching by a Remote . . . . . . B-6 Determining Need-for-Chang e. . . . . . B-7 Load Switch Example . . . . . . . . . . . . . B-8 Reduced data flow in switc ...

  • Cables to Go CDM-570 - page 10

    iv Vipersat CDM-570/570L User Guide ...

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    v Chapter 2 Figures Figure 2-1 Main Menu screen. . . . . . . . . . . . . . 2-5 Figure 2-2 Administration screen . . . . . . . . . . . 2-5 Figure 2-3 Feature Configuration screen . . . . . 2-6 Figure 2-4 Feature and Unlock Code dialog . . . 2-6 Figure 2-5 Working Mode dialog . . . . . . . . . . . 2-7 Figure 2-6 Configuring the Route Table screen 2 - ...

  • Cables to Go CDM-570 - page 12

    vi Vipersat CDM-570/570L User Guide Figure 3-61 Home State Configuration scre en 3-44 Figure 3-62 Force Modem to Home State warning 3-45 Figure 3-63 Transmit Frequen cy prompt . . . . 3-45 Figure 3-64 Transmit Data Rate prompt . . . . . 3-46 Figure 3-65 Transmit FEC Type prompt . . . . . 3-46 Figure 3-66 Transmit Coding Rate prompt . . . 3-46 Figur ...

  • Cables to Go CDM-570 - page 13

    Chapter 1 - General 1-1 C HAPTER G ENERAL How to Use This Manual This manual documents the enhanced Vipersat features and functions of the CDM-570/570L Satellite Network Modem Router, and guides the user in how to configure this product for use in a Vipersat network. The material covered addresses only those areas specific to a CDM-570/570L running ...

  • Cables to Go CDM-570 - page 14

    How to Use This Manual 1-2 Vipersat CDM-570/570L User Guide Chapter 3 — Using the Comm and Line Inte rface (CLI) Describes the use of the CLI for configuring and monitoring the CDM-570/ 570L in a Vipersat network. Each CLI screen is presented a long with a detailed description and related comman ds. Appendix A — Network Addressing Supplemental ...

  • Cables to Go CDM-570 - page 15

    Chapter 1 - General 1-3 How to Use This Manual The following documents are referenced in this manual, and provide supple- mentary information for the reader: • CDM-570/570L Modem Instal lation and Operation Manual (Part Number MN/CDM570L.IOM) • Vipersat Management System User Guide (Part Number 22156) ...

  • Cables to Go CDM-570 - page 16

    Product Description 1-4 Vipersat CDM-570/570L User Guide Product Description Introduction The Vipersat CDM-570 and CDM-570L (L-band) Satellite Network Modem Routers offer state of the art performance and reliability in a sophist icated and cost-effective 1RU package. The CDM-570/570L integrates router functionality into the modem, completely elimin ...

  • Cables to Go CDM-570 - page 17

    Chapter 1 - General 1-5 Product Description • Multi-Transponder Mode (MTM) Functions • Dynamic Power Control (DPC) for Environment or Mesh Links • Upstream Bandwidth Management Switching for Ap plication, Load, Scheduled, Manual, or VESP • Dynamic SCPC (dSCPC) Bandwidth-On-Demand • 10/100BaseT Ethernet LAN/WAN Interface • Per Route IP F ...

  • Cables to Go CDM-570 - page 18

    Product Description 1-6 Vipersat CDM-570/570L User Guide T urbo Product Coding The Comtech Vipersat CDM-5 70/570L incorporates a T urbo Product Codec (TPC). TPC is a FEC technique that delivers significant performance improve- ment when compared to Viterbi with concatenated Reed-Solomon. TPC simul- taneously offers increased coding gai n, lower dec ...

  • Cables to Go CDM-570 - page 19

    Chapter 1 - General 1-7 Product Description 1.5.3 Release New Redundancy Fe atures Redundancy Heartbeat Message for Primary Hub Units Provides the option for a periodic communications check message to be sent from the Hub modem to the VMS for backup recovery in N:M redundancy (protected) configurations. This feature allows the message interval to b ...

  • Cables to Go CDM-570 - page 20

    Product Description 1-8 Vipersat CDM-570/570L User Guide modem parameters are now preserved across firmware upgrades and reboots, eliminating a potential cause of communications failure. Vipersat File Streaming (VFS) The Vipersat File Streaming feature option allows data files to be streamed over the Vipersat network at high transmissi on rates bet ...

  • Cables to Go CDM-570 - page 21

    Chapter 1 - General 1-9 Customer Support Customer Support Cont act Information Contact Comtech Vipersat Networks Customer Support for information or assistance with product supp ort, service, or training on any Vipersat product. Mail : 3215 Skyway Court Fremont, CA 94539 USA Phone : 1+510-252- 1462 Fax : 1+510-252 -1695 Email : support@viper sat.co ...

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    Customer Support 1-10 Vipersat CDM-570/570L User Guide { This Page is Intentionally Blank } ...

  • Cables to Go CDM-570 - page 23

    Chapter 2 - Quick Start Configuration 2-1 C HAPTER Q UICK S TA R T C ONFIGURATION Introduction This chapter describes the minimum configuration of a Vipersat CDM-570/ 570L Modem/Router that is necessary in order for the equipment to function in a Vipersat network. The Vipersat CDM-570 /570L stores its co nfiguration in an ASCII file named the PARAM ...

  • Cables to Go CDM-570 - page 24

    Introduction 2-2 Vipersat CDM-570/570L User Guide Caution: Do not conn ect the TX and RX cables to test equipment without the use of a DC voltage bloc k. If BUC or LN B power is disa bled through the CLI, the setting must be Saved to prevent accidental re -enabling during modem reboot or power-cycle. ...

  • Cables to Go CDM-570 - page 25

    Chapter 2 - Quick Start Configuration 2-3 Initial Configuration Initial Configuration Note: Many of the settings required for equipment configu ration are based on the LAN/WAN and Satellite network design, and should be obtained from the networ k administra tor. T erminal Connection These procedures are performed using the CLI from a workstation co ...

  • Cables to Go CDM-570 - page 26

    Initial Configuration 2-4 Vipersat CDM-570/570L User Guide Setting V ipersat CDM-570/570L Operating Parameters The following is an example of using the CLI to brin g a Vipersat CDM-570/ 570L with factory default settings to the configuration which allows the Viper- sat functions to be accessible. When the parameter file ( param image ) of the CDM-5 ...

  • Cables to Go CDM-570 - page 27

    Chapter 2 - Quick Start Configuration 2-5 Initial Configuration Figure 2-1 Main Menu screen 2. From the Administration screen shown in figure 2-2, select the Features Configuration command by entering F at the command prompt. Figure 2-2 Administration screen 3. From the Feature Configuration menu shown in figure 2-3, verify whether or not the Viper ...

  • Cables to Go CDM-570 - page 28

    Initial Configuration 2-6 Vipersat CDM-570/570L User Guide Figure 2-3 Feature Configuration screen Figure 2-4 Feature and Unlock Code dialog Tip: The network administrator will have the feature and unlock codes. These are stored by the MAC address for the target CDM-57 0/570L. The target unit’s MAC address can be found by entering an I and then a ...

  • Cables to Go CDM-570 - page 29

    Chapter 2 - Quick Start Configuration 2-7 Initial Configuration 6. Save the settings to flash by entering S at the command prompt . 7. Enter X at the command prompt to exit the Feature Configur ation menu and return to the Administration screen. 8. Ensure that the Working Mode is set to Router-Vipersat . If it is not, enter C and change the setting ...

  • Cables to Go CDM-570 - page 30

    Initial Configuration 2-8 Vipersat CDM-570/570L User Guide Configure the Route T able Routing in a V ipers at Network CDM-570/570L modem/ro uters operating in Vipersat mode do not use the small or large network described in the CDM-570/570L Installation and Opera- tion Manual . There is no HDLC address in a Vipersat network; instead, the CDM-570/57 ...

  • Cables to Go CDM-570 - page 31

    Chapter 2 - Quick Start Configuration 2-9 Initial Configuration that must be created is a gateway address for routing the data traffic that is received by the unit. 1. From the Main Menu shown in figure 2-1, select Route Table by entering R at the command prompt. 2. From the Configuring the Route Table screen shown in figure 2-6, enter 1 at the com ...

  • Cables to Go CDM-570 - page 32

    Initial Configuration 2-10 Vipersat CDM-570/570L User Guide If this Hub unit is providing the TDM outbound, a route statement or state- ments defining satellite communications with the Remote units must be entered as well. One recommended option is to enter a single super-route that will handle satellite communications with all of the remote subnet ...

  • Cables to Go CDM-570 - page 33

    Chapter 2 - Quick Start Configuration 2-11 Initial Configuration Set the Vi persat Configuration 1. Enter V at the Main Menu command prompt shown in figure 2-1 to selec t the Vipersat Configuration menu shown in figure 2-8. Figure 2-8 Vipersat Configuration screen (H ub) 2. Enter R at the command prompt to toggl e the Unit Role to either Hub or Rem ...

  • Cables to Go CDM-570 - page 34

    Initial Configuration 2-12 Vipersat CDM-570/570L User Guide 6. Enter V at the command prompt to set the Receive Multicast Address . The Receive Multicast Address is the multicast IP address assigned to the VMS and to all units in the network. The Hub modem transmits the multi- cast to this IP address, and the Remotes receive the multicast on this a ...

  • Cables to Go CDM-570 - page 35

    Chapter 3 - Using the Command Line Interface (CLI) 3-1 C HAPTER U SING THE C OMMAND L INE I NTERFACE (CLI) General This chapter describes the use of the CLI for configuring and monitoring the CDM-570/570L Modem Route r in a Vipersat network. Ea ch CLI screen related to a CDM-570/570L operating i n Vipersat mode is presented, along wit h a detailed ...

  • Cables to Go CDM-570 - page 36

    General 3-2 Vipersat CDM-570/570L User Guide not applied. However, if these changes are not saved prior to a system reset or power cycle, they will be lost. Exit To Exit the current menu screen an d return to the previous screen in the menu tree, enter X at the command prompt. T elnet Logout Enter L at the command prompt to Logout of the Telnet ses ...

  • Cables to Go CDM-570 - page 37

    Chapter 3 - Using the Command Line Interface (CLI) 3-3 Menu Descriptions Menu Descriptions This section details the CLI command menus and briefly discusses the function of each of the commands available on each menu. Main menu The Main Menu , shown in figure 3-1, allows co nfiguring both the modem and router functions of the target CDM-570/ 570L. N ...

  • Cables to Go CDM-570 - page 38

    Menu Descriptions 3-4 Vipersat CDM-570/570L User Guide Figure 3-2 Administration screen Enter an F at the prompt to display the Feature Configuration screen shown in figure 3-3. Feature Configuration Figure 3-3 Feature Configuration screen ...

  • Cables to Go CDM-570 - page 39

    Chapter 3 - Using the Command Line Interface (CLI) 3-5 Menu Descriptions The Feature Configuration screen shown in figure 3-3 allows enablin g and disabling CDM-570/570L fea tures. Use this me nu to enable and disable V ipersat featu res such as: • Vipersat STDMA • Vipersat Auto Switching • Vipersat File Streamer Note: You must enable and dis ...

  • Cables to Go CDM-570 - page 40

    Menu Descriptions 3-6 Vipersat CDM-570/570L User Guide Vi pe r s at S T D MA In order to utilize the Vipersat STDMA feature in the target Vipersat CDM-570/ 570L, this feature must be enable d. Enter A at the command prompt to toggle on or off. Vipersat Auto Switching In order to utilize the auto switching capabilities of the target Vipersat CDM-570 ...

  • Cables to Go CDM-570 - page 41

    Chapter 3 - Using the Command Line Interface (CLI) 3-7 Vipersat Configuration V ipersat Configuration Enter V at the command prompt from the CDM-5 70/570L Main Menu sh own in figure 3-1 to display the Vipersat Configuration screen shown in figure 3-5. Figure 3-5 Vipersat Configuration screen (Hub) This menu lists the available commands for configur ...

  • Cables to Go CDM-570 - page 42

    Vipersat Configuration 3-8 Vipersat CDM-570/570L User Guide Figure 3-6 STDMA screen (Hub, Dynamic Cycle type) Figure 3-7 STDMA screen (Remot e) STDMA This menu item is read-only and shows the current state of STDMA in the CDM-570/570L. In order to change the STDMA state in the CDM-570/570L, refer to the section “Feature Configuration ” on page ...

  • Cables to Go CDM-570 - page 43

    Chapter 3 - Using the Command Line Interface (CLI) 3-9 Vipersat Configuration STDMA Tx Rate This menu item shows the STDMA transmit rate in bps. This item is read-only and cannot be modified in this m enu. Hub T ype This menu item is only displayed if the CDM-570/570L is being used as a Hub in the network. Vipersat STDMA has five modes of op eratio ...

  • Cables to Go CDM-570 - page 44

    Vipersat Configuration 3-10 Vipersat CDM-570/570L User Guide 1 -- Fi xed In the Fixed mode, all re motes have the same slot size regardles s of type of traf- fic or load. 2 -- Dynamic Sl ot In the Dynamic Slot mode, the slot size for each remote is computed based on the time (at the current data rate) needed to transmit all the Bytes in Queue. If t ...

  • Cables to Go CDM-570 - page 45

    Chapter 3 - Using the Command Line Interface (CLI) 3-11 Vipersat Configuration This mode is designed to accommodate the needs of a remote which will not be continuously connected to the network, but which has the need to be able to make an on-de mand connec tion when requi red, such as a mobile remote. Note that the switch occurs as soon as the hub ...

  • Cables to Go CDM-570 - page 46

    Vipersat Configuration 3-12 Vipersat CDM-570/570L User Guide group. The burstmap is a proprietary message sent from the Hub to all re motes, at regular intervals, specifying the relative start time and duration for each terminal to transmit. To change the current address, enter N at the command prompt to display the dialog sh own in figure 3 -10. F ...

  • Cables to Go CDM-570 - page 47

    Chapter 3 - Using the Command Line Interface (CLI) 3-13 Vipersat Configuration Figure 3-12 Cycles per Burst Map prompt Slot Guardband This menu item displays the current length of the slot guardband in milli- seconds and the size o f the guardband in bytes for the target CDM-570/570L. Figure 3-13 Slot Guardband prompt On a Hub unit, this value can ...

  • Cables to Go CDM-570 - page 48

    Vipersat Configuration 3-14 Vipersat CDM-570/570L User Guide Note: Refer to the Viper Calcu lator for determining p reamble length values to enter at the command prompt. If you n ot have a copy of the latest Viper Calculator, co ntact your Comtech Vipe rsat Networks representative to inquire about a copy. Slot Dat a Length This menu item displays t ...

  • Cables to Go CDM-570 - page 49

    Chapter 3 - Using the Command Line Interface (CLI) 3-15 Vipersat Configuration Slot St art in Cycle This menu item is an information-only display for Remote modems, and indi- cates how much time passes from the start of the spin cycle until this Remote is provided a time slot. In the example shown in figure 3-7, the Remote is provided the first slo ...

  • Cables to Go CDM-570 - page 50

    Vipersat Configuration 3-16 Vipersat CDM-570/570L User Guide Figure 3-17 Adding a Remo te to the STDMA group Once a Remote has been added to the group, its Status in the gro up is displayed by the use of the following letters: • U = Used – This Remote is being used in the burstmap Once a remote has been added to the STDMA group, this status wil ...

  • Cables to Go CDM-570 - page 51

    Chapter 3 - Using the Command Line Interface (CLI) 3-17 Vipersat Configuration Remote Count The Remote Coun t menu item in figure 3-16 is an information only display showing the total number of Remotes that currently belong to the STDMA group for thi s Hub modem. Set Remote Policies This menu item, which appears for GIR and Entry Chan nel Hub types ...

  • Cables to Go CDM-570 - page 52

    Vipersat Configuration 3-18 Vipersat CDM-570/570L User Guide The Remote Policies screen for an Entry Channel Hub type allows the SCPC data rates and switch types to be specified for when a Remote wil l switch and the desired starting point for communications. Figure 3-21 Entry Channel Switch Rates screen Entering the Remote number at the command pr ...

  • Cables to Go CDM-570 - page 53

    Chapter 3 - Using the Command Line Interface (CLI) 3-19 Vipersat Configuration Figure 3-24 Global Switch Type prompt Delete Remote Entering D at the command prompt shown in fig ure 3-16 brings up the Delete Remote dialog shown in figure 3-2 5. Figure 3-25 Delete Remote prompt Enter the number of the Remote CDM-57 0/570L at the command prompt t o de ...

  • Cables to Go CDM-570 - page 54

    Vipersat Configuration 3-20 Vipersat CDM-570/570L User Guide Figure 3-27 View Remote(s) screen The display is for information only and pressing any key will return you to the menu shown in figure 3-16. Remove Timeout Entering R at the command prompt shown in figure 3-16 will display the Remove Timeout dialog shown in figure 3-28. Note that the me n ...

  • Cables to Go CDM-570 - page 55

    Chapter 3 - Using the Command Line Interface (CLI) 3-21 Vipersat Configuration Figure 3-29 Remove Retry Time out prompt When a Remote is removed from the STDMA group, as described in the section “Remove Timeout” above, entering a value in the Remove Retry Timeout dialog abov e defines the amount of time (in seconds) that i s allowed to pass bef ...

  • Cables to Go CDM-570 - page 56

    Vipersat Configuration 3-22 Vipersat CDM-570/570L User Guide Figure 3-31 STDMA Statistics screen (Remote) The window of time that is used to average the accumulation of sta tistics can be set by entering W at the command prompt in the Hub screen, then entering the number of seconds (from 1 to 20). To clear (reset to 0) these statistics, enter C at ...

  • Cables to Go CDM-570 - page 57

    Chapter 3 - Using the Command Line Interface (CLI) 3-23 Vipersat Configuration the Nominal Data Slot Size and the Minimum Data Slot Size parameters. These parameters are operator selectable. The spee d with which STDMA reacts to changes in dynamic load is a function of the Statistics Accumulation Window parameter and the Cycles per Burst Map parame ...

  • Cables to Go CDM-570 - page 58

    Vipersat Configuration 3-24 Vipersat CDM-570/570L User Guide Figure 3-34 STDMA/SCPC Auto Switching screen (Remote) Auto Switching The Auto Switching item is for information only and shows the current config- uration of the target CDM-570/570L. This feature is Enabled and Disabled as described in section “Feature Configuration” on page 3-4. Auto ...

  • Cables to Go CDM-570 - page 59

    Chapter 3 - Using the Command Line Interface (CLI) 3-25 Vipersat Configuration Detection of the voice and video traffic occurs in the Remote modem classifier, which looks at traffic that is passed in both directions (Hub-to-Remote and Remote-to-Hub). Once the Voice and Video Switch Detection features are enabled, the Remote modem will send an Autom ...

  • Cables to Go CDM-570 - page 60

    Vipersat Configuration 3-26 Vipersat CDM-570/570L User Guide most encryption methods, ToS switching provides an alternative means of SCPC switching when encryption prevents the detection of SIP and H.323 protocols. ToS detection occurs in the Remote modem classifier which only looks at traffic that is passed in the LAN-to-SAT (Remote to Hub) dir ec ...

  • Cables to Go CDM-570 - page 61

    Chapter 3 - Using the Command Line Interface (CLI) 3-27 Vipersat Configuration classifier, which looks at traffic that is passed in both directions (Hub-to- Remote and Remote-to-Hub). When an IP packet matches a defined QoS rule, the Remote modem sends an ASR to the VMS that contains the destination address of the detected packet, the defined bit r ...

  • Cables to Go CDM-570 - page 62

    Vipersat Configuration 3-28 Vipersat CDM-570/570L User Guide Figure 3-35 QoS Configuration scre en Enter Q at the command prompt in figure 3-35 to access the QoS Rules Config- uration screen, as shown in figure 3-36. Figure 3-36 QoS Rules Configuration screen Configure the desired number of rules that are necessary for the applications to be used f ...

  • Cables to Go CDM-570 - page 63

    Chapter 3 - Using the Command Line Interface (CLI) 3-29 Vipersat Configuration Figure 3-37 QoS Rules Based Switching screen Determine which QoS rules will be used as a basis for performing SCPC switching, then configure the VMS policy type, the SCPC switch rate, and the timeout value to be associated with each rule. Assigning a 0 (zero) value means ...

  • Cables to Go CDM-570 - page 64

    Vipersat Configuration 3-30 Vipersat CDM-570/570L User Guide Note: Load Switching must be enabled for each CDM-570/570L in a network that is goin g to perform Load Switching in order for the VMS to dynamically optimize network performance as load condi- tions change on these circuit s. Application switching by the VMS, such as for Voice and /or Vid ...

  • Cables to Go CDM-570 - page 65

    Chapter 3 - Using the Command Line Interface (CLI) 3-31 Vipersat Configuration Figure 3-39 STDMA Switch Delay prompt Percent Allo cation The Percent Allocation menu item allows adding a fixed percentage to the channel bandwidth request to accommodate additional bandwidth requirements which may occur after the switch is made from STDMA to SCPC mode. ...

  • Cables to Go CDM-570 - page 66

    Vipersat Configuration 3-32 Vipersat CDM-570/570L User Guide The SCPC Step Down Threshold establishes the percentage o f bandwidth use that will trigger a switch down from the present SCPC rate to a lower rate to ensure efficient bandwidth usage. Typically the default value will be optimum, but if a different threshold is desired, an alternate valu ...

  • Cables to Go CDM-570 - page 67

    Chapter 3 - Using the Command Line Interface (CLI) 3-33 Vipersat Configuration Figure 3-41 ToS Switching Control screen T oS Switching Entry After determining what ToS value to use, either application or router classifier, select a ToS entry from the list for configuration or edit. The screen will prompt for inputs to the list of range-checked valu ...

  • Cables to Go CDM-570 - page 68

    Vipersat Configuration 3-34 Vipersat CDM-570/570L User Guide • Enter the TOS SCPC Switch Data Rate - Enter the desired data rate for this service type. Valid entries are from 0 to 10,000 Kbps. This setting will override the VMS set policy value. • Enter the TOS SCPC Timeout - This timer monitors the defined packet flow. Once data stops for the ...

  • Cables to Go CDM-570 - page 69

    Chapter 3 - Using the Command Line Interface (CLI) 3-35 Vipersat Configuration Unit Role The Unit Role configuration determines whether the target CDM-570/570L is to function as a Remote or as a Hub in the Vipersat satellite network. From the Vipersat Configuration screen (figure 3-5), enter R to display the dialog shown in figure 3-45. Figure 3-45 ...

  • Cables to Go CDM-570 - page 70

    Vipersat Configuration 3-36 Vipersat CDM-570/570L User Guide Network ID The Network ID that is assigned to the unit defines to what network the target CDM-570/570L will belong. All units used in a network will have the same Network ID. Enter B at the command prompt in the Vipersa t Configurati on screen (figure 3-5) to display the dialog shown in f ...

  • Cables to Go CDM-570 - page 71

    Chapter 3 - Using the Command Line Interface (CLI) 3-37 Vipersat Configuration configuration data, includ ing the CDM-570/570L’s IP address. When the VMS receives the unicast response, it registers the CDM-570/570L on the network. Enter V at the command prompt in the Vipersat Configuration screen (figure 3-5) to display the dialog sh own in figur ...

  • Cables to Go CDM-570 - page 72

    Vipersat Configuration 3-38 Vipersat CDM-570/570L User Guide N:M redundancy (protected) configurations. The message interval can be spe ci- fied by the administrator through the VMS. Enter P at the command prompt in the Vipersat Confi guration screen (figure 3-5) to toggle this feature between Enabled and Disabled . Home S tate Revert This menu ite ...

  • Cables to Go CDM-570 - page 73

    Chapter 3 - Using the Command Line Interface (CLI) 3-39 Vipersat Configuration Figure 3-51 DPC Configuration screen (STDMA mode) Figure 3-52 DPC Configuration screen (SCPC mode) Note: The following descriptions will refer to the CDM-570/57 0L as either modulator or demodulator for simplicity and understanding. Before enabling DPC, the operator shou ...

  • Cables to Go CDM-570 - page 74

    Vipersat Configuration 3-40 Vipersat CDM-570/570L User Guide Calibrated Dat a Rate This menu item is for information only and displays the Calibrated Data Rate in Kbps for the target CDM-570/570L. There is a proportional relationship between data rate and power level; as the data rate increases, there is a corresponding increase in transmit power l ...

  • Cables to Go CDM-570 - page 75

    Chapter 3 - Using the Command Line Interface (CLI) 3-41 Vipersat Configuration Figure 3-54 Minimum Power Level prompt (CDM-570L) The value entered sets the minimum power level allowed by all SCPC modula- tors. Max St ep Down Power The Maximum Step Down Power value sets the largest step reduction in trans- mit power permitted when the DPC is adjusti ...

  • Cables to Go CDM-570 - page 76

    Vipersat Configuration 3-42 Vipersat CDM-570/570L User Guide T arget EbNo The Target EbNo is the desired operating receive level for closed loop servo control. This is the value used by the receiving CDM-570/570L for comparison with the actual received Eb/No. This information is sent back to the transmitting terminal for output power level adjustme ...

  • Cables to Go CDM-570 - page 77

    Chapter 3 - Using the Command Line Interface (CLI) 3-43 Vipersat Configuration Enter Q at the command prompt in the DPC Configuration screen to display the Speed Up EbNo dialog shown in figure 3-59. The default va lue for this parameter is 5 dB. Figure 3-59 Speed Up EbNo prompt T arget DPC Address The Target DPC Address identifies the modem that is ...

  • Cables to Go CDM-570 - page 78

    Vipersat Configuration 3-44 Vipersat CDM-570/570L User Guide prompt in the Vip ersat Configuration screen to display the Home State Configuration screen shown in figure 3-61. The parameters entered using this menu define the settings the target CDM-570/ 570L will go to when it returns to its Home State, either as the result of a command by the VMS, ...

  • Cables to Go CDM-570 - page 79

    Chapter 3 - Using the Command Line Interface (CLI) 3-45 Vipersat Configuration Tip: This command is useful when a CDM-570/570L’ s initial set up is completed and th e unit is functioning as desired in a network. Force Modem to Home St ate If at any time it is desired to have a CDM-570/570L return to its Home State, this command (enter Y ) can be ...

  • Cables to Go CDM-570 - page 80

    Vipersat Configuration 3-46 Vipersat CDM-570/570L User Guide Figure 3-64 Transmit Data Rate prompt Note that the valid range for this parameter will vary depending on the modula- tion type, codin g rate, and FAST feature data rat e. T ransmit FEC T ype Enter C at the command prompt to use the dialog shown in Figure 3-65 to enter the FEC Coding Type ...

  • Cables to Go CDM-570 - page 81

    Chapter 3 - Using the Command Line Interface (CLI) 3-47 Vipersat Configuration T ransmit Modulation T ype Entering E at the command promp t to use the dialog shown in figure 3-67 to set the Transmit Modulation Type fo r the target CDM -570/570L’s home stat e. Figure 3-67 Transmit Modulation Type prompt T ransmit Power Level Enter F at the command ...

  • Cables to Go CDM-570 - page 82

    Vipersat Configuration 3-48 Vipersat CDM-570/570L User Guide Note that this screen dialog example displays the frequency range for the CDM- 570L L-Band modem. For the CDM-570, the range displayed will be either 50 to 90 MHz or 100 to 180 MHz. Receive Dat a Rate Enter N at the command prompt to use the dialog shown in Figure 3-70 to set the Receive ...

  • Cables to Go CDM-570 - page 83

    Chapter 3 - Using the Command Line Interface (CLI) 3-49 Vipersat Configuration Figure 3-72 Receive Coding Rate prompt Note that Coding Rates 3 (1/2), 4 (2/3), and 8 (1/1) are not valid selections when operating in Vipersat mo de with Turbo Product Coding. Receive Modulation T ype Enter Q at the command prompt to use the dialog shown in Figure 3 -73 ...

  • Cables to Go CDM-570 - page 84

    Vipersat Configuration 3-50 Vipersat CDM-570/570L User Guide Figure 3-74 Vipersat Summary screen The Node ID number that appears in this screen verifies that the unit is regis- tered with the VMS and is active in the network. This number is automaticall y assigned by the VMS. The two frequency listings are for the modulator ( 0 ) and the demodulato ...

  • Cables to Go CDM-570 - page 85

    Chapter 3 - Using the Command Line Interface (CLI) 3-51 Vipersat Configuration Figure 3-75 Vipersat Migration prompt Refer to Appendix D, Firmware Installation , in this document for additional information on the use of this command. ...

  • Cables to Go CDM-570 - page 86

    Vipersat Configuration 3-52 Vipersat CDM-570/570L User Guide { This Page is Intentionally Blank } ...

  • Cables to Go CDM-570 - page 87

    Appendix A - Network Addressing A-1 A PPENDIX N ETWORK A DDRESSING This Appendix is an overview of network addressing and how it applies to configuring the CDM-570/570L for use in Vipersat Networks. The subjects covered are: • OSI Model • Binary Math • IP Addressing • Network Address Translation • Subnets • Network Segments • Default ...

  • Cables to Go CDM-570 - page 88

    The OSI Reference Model A-2 Vipersat CDM-570/570L User Guide The OSI Reference Model OSI is an acronym for Open Systems Interconnection. This is a network model created by ISO (the International Standardization Organizat ion.) The OSI model is the basic stan dard which forms the basis for all n etworking protocols. Figure A-1 The Seven OSI Protocol ...

  • Cables to Go CDM-570 - page 89

    Appendix A - Network Addressing A-3 The OSI Reference Model Layer 3 / Network Layer – Layer 3 is responsible for routing packet s through multiple networks. The Layer 3 protocol operates without regard to the underly- ing protocols in use. For example, routers operate at Layer 3. ...

  • Cables to Go CDM-570 - page 90

    Binary Math A-4 Vipersat CDM-570/570L User Guide Binary Math Network devices communicate using BITS, where a bit is a single digit repre- sented by a 1 or a 0, or by using BYTEs, where a byte is made up of eight bits in any combination of 1’s or 0’s. A byte is also referred to as an octet. Figure A-2 Bits and Bytes An octet can be converted to ...

  • Cables to Go CDM-570 - page 91

    Appendix A - Network Addressing A-5 Binary Math The conversion to decimal is done whenever binary values need to be read or entered by humans as their decimal equivalents. ...

  • Cables to Go CDM-570 - page 92

    IP Addressing A-6 Vipersat CDM-570/570L User Guide IP Addressing An IP (Internet Protocol) address is a unique set of numbers assigned to a device on a network to uniquely identify that device (by its IP address). An IP address is a unique number composed of four octets, with each octet separated by a dot. This notation style is called dotted decim ...

  • Cables to Go CDM-570 - page 93

    Appendix A - Network Addressing A-7 IP Addressing • 16-bit node number Figure A-4 IP Address Classes A, B, C Class C • 192.0.1.x to 223.25 5.254.x • 2,097,152 Class Cs exist • Can have 254 hosts on each Class C • 24-bit network number • 8-bit node number Class D • 224.0.0.0 to 239. 255.255.255 • Reserved for Multicast (messages sent ...

  • Cables to Go CDM-570 - page 94

    IP Addressing A-8 Vipersat CDM-570/570L User Guide Private Network IP Addresse s RFC 1918 defines blocks of addresses for use on private networks: • 10.0.0.0 – 10.255.255.255 • 172.16.0.0 – 172.31.255.25 5 • 192.168.0. 0 – 192.168.255.25 5 Network Address T ranslation (NA T) Private networks can only connect to the public Internet by us ...

  • Cables to Go CDM-570 - page 95

    Appendix A - Network Addressing A-9 IP Addressing Subnetting is required if the network is segmented. Subnet Mask The Subnet Mask is used by the host to determine if a destination IP address is on the local or on a remote network segment. The table in Figure A-6 shows the default subnet mask used for each class of IP address. Figure A-6 Default Sub ...

  • Cables to Go CDM-570 - page 96

    IP Addressing A-10 Vipersat CDM-570/570L User Guide Figure A-7 ANDing an IP address and a subnet mask A calculator, available from SolarWinds, performs these IP and subnet mask calculations and can be found at: http://support.solarwinds.net/updates/SelectProgramFree. cfm Network Segment s A “Network Segment” is a portion of a network that is bo ...

  • Cables to Go CDM-570 - page 97

    Appendix A - Network Addressing A-11 IP Addressing Each of the four su bnets can, in turn, support 64 members. The example subnet used above yielded 4 subnets, but you can use a different mask to meet the specific requirements of your network. Default Gateways A default gateway is a network device, usually a router, that is responsible for routing ...

  • Cables to Go CDM-570 - page 98

    IP Addressing A-12 Vipersat CDM-570/570L User Guide • The first six characters are issued to the organization. • The second six characters are assigned to the hardware interfac e by manufacturing. Figure A-10 Network Node MAC Addresses ...

  • Cables to Go CDM-570 - page 99

    Appendix B - Automatic Switching B-1 A PPENDIX A UTOMATIC S WITCHING General Automatic switching is a feature of VMS which allows dynamically changing network configuration in response to changes in either traffic type (application switching) or network traffic loads (load switching.) The following discussions apply to the Vipersat CDM-570/570 L, C ...

  • Cables to Go CDM-570 - page 100

    Load Switching B-2 Vipersat CDM-570/570L User Guide excess margin. The main difference between switching from STDMA t o SCPC and adjusting within SCPC is that in STDMA mode, the current available band- width is constantly changing while in SCPC mode it is constant between switches. Furthermore, switches from STDMA to SCPC mode are always caused by ...

  • Cables to Go CDM-570 - page 101

    Appendix B - Automatic Switching B-3 Load Switching 3. Determine if a load switch is needed. Table 2.1 STDMA ACK Message Table B-1 If there is adequate upstream bandwidth available, the values of these two metrics will be the same. However, if there i s not enough bandwidth to satisfy the traffic requirements of the remote, or i f the remote has ex ...

  • Cables to Go CDM-570 - page 102

    Load Switching B-4 Vipersat CDM-570/570L User Guide remote is divided by the total Bytes in Queue for all remotes to give the percentage allocation for each remote.) • Dynamic Slot Mode - The slot size for each remote is computed based on the time (at the current data rate) needed to transmit all the Bytes in Queue. If the result is less than the ...

  • Cables to Go CDM-570 - page 103

    Appendix B - Automatic Switching B-5 Load Switching Table B-2 Figure B-1 Hub autoswitching menu • Auto Switching - This is a Vipersat Feature which is enabled in the CDM Features Menu. If Auto Switching is not enabl ed, Load Switching will be ignored. • Load Switching - This is a type of Automatic Switching that is based on the amount of traffi ...

  • Cables to Go CDM-570 - page 104

    Load Switching B-6 Vipersat CDM-570/570L User Guide Load Switching Process Each time the hub receives an STDMA ACK, it computes the average load for that remote. (See Appendix A for a discussion of how the average is computed.) This average is then compared to the bandwidth currently allocated to the remote. For example, if a remote gets a 50 ms sl ...

  • Cables to Go CDM-570 - page 105

    Appendix B - Automatic Switching B-7 Load Switching Table B-3 Figure B-2 Autoswitching menu for a remote • Auto Switching - Same as Hub • Load Switching - Same as Hub • SCPC Step Up Threshold - Same as STDMA Slot Capacity at hub. • SCPC Step Down Threshold - Similar to STDMA Slot Capacity at hub except Step Down is used to trigger a switch ...

  • Cables to Go CDM-570 - page 106

    Load Switch Example B-8 Vipersat CDM-570/570L User Guide Load Switch Example An automatic load switching example, illustrated in the schematic diagram in figure B-3, illustrates how a network can respond to changes in traffic volume or load conditions. The network’s capability and method of response to load changes is determined by the setting an ...

  • Cables to Go CDM-570 - page 107

    Appendix B - Automatic Switching B-9 Load Switch Example 3. The STDMA Hub Controller compares the remote CDM-570/570L’s pre- selected buffer limits with its buffer status and if the buffer status exceeds the preselected limits the STDMA Hub Controller increases the time-slot allocated to that channel. If this brings the buffer status within estab ...

  • Cables to Go CDM-570 - page 108

    Load Switch Example B-10 Vipersat CDM-570/570L User Guide Reduced dat a flow in switched mode (SCPC) In the event the data flow is reduced, for example a streaming file transfer termi- nates, the SCPC switched demodulator detects the reduced flow and notifies the VMS. Then, after a period of time determined by policies set for the network, the VMS ...

  • Cables to Go CDM-570 - page 109

    Appendix B - Automatic Switching B-11 Application switching Application switching Application switching, diagramed in figure B-4, also is capable of changing bandwidth used, but the change is determined entirely by the type of application being requested ignoring load requirements. Table B-5 Table B-6 Figure B-4 Application switching diagram In a s ...

  • Cables to Go CDM-570 - page 110

    Application switching B-12 Vipersat CDM-570/570L User Guide Each application type will have been assigned a bandwidth all ocation when the policy for the remote site is established. The voice applicati on, for example, might have had the bandwidth set in the policy to handle three simultaneous voice connections. When a VoIP pro tocol is detected in ...

  • Cables to Go CDM-570 - page 111

    Appendix B - Automatic Switching B-13 Type of Service (ToS) Switching T ype of Service (T oS) Switching Type of Service (ToS) switching is used on circuits carrying encrypted traffic where the packets cannot be examined to determine the t ype of traffic being carried. Normally, in a non-encrypted Vipersat network, packets are classified by the remo ...

  • Cables to Go CDM-570 - page 112

    Entry Channel Mode (ECM) Switching B-14 Vipersat CDM-570/570L User Guide Entry Channel Mode (ECM) Switching STDMA entry channel mode provides a method for remotes requiring SCPC access channels to enter/re-enter the network initially or after a power or other site outage. The switch time will be variable based on the burst rate (bps) of the STDMA g ...

  • Cables to Go CDM-570 - page 113

    Appendix B - Automatic Switching B-15 Entry Channel Mode (ECM) Switching 1. If the outage was the result of power outage at the site, the remote CDM570(L) will reboot in its home state (ST DMA), acknowledge the receipt of the first burst map causing it to rejoin the network through ECM. The VMS will park the demodulator previously in use and free t ...

  • Cables to Go CDM-570 - page 114

    Entry Channel Mode (ECM) Switching B-16 Vipersat CDM-570/570L User Guide Table B-8 Figure B-6 ECM switch recovery > 3 minutes Unit Reboot 0 Burst Demod Switched Demod VMS Remote State Connected 0 Home State - S T D M A TX Grant Burst ACK > 240 Satellite Delay 250 ms + 30 ms E - E State Disconnected 180 F a i l u r e No Communic ations 180 . 2 ...

  • Cables to Go CDM-570 - page 115

    Appendix C - Dynamic Power Control C-1 A PPENDIX D YNAMIC P OWER C ONTROL Introduction Dynamic Power Control (DPC) provides a mechanism whereby VIPERSAT satellite links have their transmit power levels adjusted in order to optimize the receive signal quality (as measured by the demodulator Eb/No). This optimiza- tion process acts to either increase ...

  • Cables to Go CDM-570 - page 116

    C-2 Vipersat CDM-570/570L User Guide Eb/No values as the input function and the modulator’s transmit power as the output function. Only modulator transmit power is controlled by the algorithm since the receive chain has its own automatic gain control. DPC can be applied to any or all of the modems with the exception of t he STDMA burst control de ...

  • Cables to Go CDM-570 - page 117

    Appendix C - Dynamic Power Control C-3 The start point for all enabled modulators is the Nominal Power Level. This level is measured during initial system turn-up and i s the power level at which all modems will initially transmit when a call is established. Once communica- tion is established and data starts to flow, the modulator begins receiving ...

  • Cables to Go CDM-570 - page 118

    C-4 Vipersat CDM-570/570L User Guide DPC Scaling Function Figure C-1 DPC Scaling Function Figure C-1 illustrates the scaling function, based on the ratio of power level to data rate, of the DPC system. Once this ratio is mapped out for the system, the DPC scaling function wil l automatically determine the appropriate power level for any given data ...

  • Cables to Go CDM-570 - page 119

    Appendix C - Dynamic Power Control C-5 able to function and will disable itself, resulting in an error message that is displayed in the CLI. Under most circumstances, the system will be running at the Calibrated Data Rate, at the Calibrated Nominal Power level. When the VMS sends a switch command to the CDM, the modem will go to a different data ra ...

  • Cables to Go CDM-570 - page 120

    C-6 Vipersat CDM-570/570L User Guide { This Page Intentionally Blank } ...

  • Cables to Go CDM-570 - page 121

    Appendix D - Network Migration D-1 A PPENDIX N ETWORK M IGRATION Upgrading CDM-570/CDD-564 Series Modems to Firmware V ersion 1.5.3 General This document co vers the migration of networks with CDM-570 and CDD-56 4 series modems to Firmware version 1.5.3 from any earlier versions of code. It addresses the issues customers will face when migrating th ...

  • Cables to Go CDM-570 - page 122

    General D-2 Vipersat CDM-570/570L User Guide Since there is no way to guarantee all Remote sites will be online during the initial upgrade to v1.5.3, Vipersat is providing this migration procedure and util- ity to facilitate picking up new or offline units. This migration tool includes non-saved control parameters at Hub units only that allow the o ...

  • Cables to Go CDM-570 - page 123

    Appendix D - Network Migration D-3 Firmware Upgrade Firmware Upgrade Upgrade Overview This procedure describes the firmware upgrade process using both the Vipersat Vload Utility and a Telnet connection. For detai led information on using Vload, refer to the Vload Utility User Guide . Caution: This firmware installa tion procedure requires the mod e ...

  • Cables to Go CDM-570 - page 124

    Firmware Upgrade D-4 Vipersat CDM-570/570L User Guide 6) "Get Information" and load v1.5.1 base modem code to "Oldest" and reset all the modems to "Latest". 7) Load v1.5.1 modem code to "Oldest" (replacing the older image in the other location). 8) Load v1.5.3 router firmware to the "Oldest" Bulk Im ...

  • Cables to Go CDM-570 - page 125

    Appendix D - Network Migration D-5 Firmware Upgrade Figure D-2 Initial Vload screen Figure D-3 Add All dialog Note that the Receive Multicast Address is the same as the Transmit Multicast Address for the VMS. This IP address can be found unde r the VMS ViperView tree view “Vipersat Manager”. ...

  • Cables to Go CDM-570 - page 126

    Firmware Upgrade D-6 Vipersat CDM-570/570L User Guide Figure D-4 Get Information for IP Addr ess It is very important to get information after each step. VLOAD needs to be aware of the current config uration of the modems when maki ng decisions abou t "Oldest" and "Latest". Upgrade Router to v1.5.3 This step will upgrade the Bul ...

  • Cables to Go CDM-570 - page 127

    Appendix D - Network Migration D-7 Firmware Upgrade Figure D-5 Put Application screen (Consecutive Load) Save and Reboot to Latest Using either VMS or CLI, Save each unit to flash and reboot with Hard Reset to Latest . Figure D-6 Hard Reset screen Note that all other parameters are set to defaults and do not require any changes. ...

  • Cables to Go CDM-570 - page 128

    Firmware Upgrade D-8 Vipersat CDM-570/570L User Guide Get Information for Router v1.5.3 Figure D-7 Unit Information screen (Router) The new unit information will show that Image 1 Version=1.5.3 and that the Application Version=1.5.3. The application CurrentBoot should = the image slot location of 1.5.3, and NextBoot=Latest and Save=Oldest. The next ...

  • Cables to Go CDM-570 - page 129

    Appendix D - Network Migration D-9 Firmware Upgrade Figure D-9 Configuration File Te xt If this text is not displayed, Save to flash again, get the configuration and check for them in the configuration file once more. Note that the contents of the text lines will differ based on the actual con figuration and modem type. Upgrade Base Modem to v1.5.1 ...

  • Cables to Go CDM-570 - page 130

    Firmware Upgrade D-10 Vipersat CDM-570/570L User Guide Figure D-11 Download v1.4.5 and Hard Reset screen When the file transfer is completed, Hard Reset the Modem(s). Upgrade Image 1 on Base Modem to v1.5.1 Get Unit Information to show that v1.4.5 modem code is loaded in Image 1 and that the Base Modem Current Image = Image 1. Which ima ge this is ...

  • Cables to Go CDM-570 - page 131

    Appendix D - Network Migration D-11 Firmware Upgrade Figure D-13 Download v1.5.1 and Hard Reset screen Download Base Modem v1.5.1 to Image 2 Get Unit Information to show that the current Base Modem image is Image 2, which is v1.5.1 firmware. Figure D-14 Unit Information screen (Ba se Modem Image 2) Repeat the Download procedure for the Base Modem v ...

  • Cables to Go CDM-570 - page 132

    Firmware Upgrade D-12 Vipersat CDM-570/570L User Guide Figure D-15 Unit Information screen (Ba se Modem v1.5.1 ) Download Router v1.5.3 to Image 2 Download the v1.5.3 firmware file to the Router Image 2. This insures that the latest firmware code is loaded in all images. Get Unit Information one last time and Save the file when prompted. This file ...

  • Cables to Go CDM-570 - page 133

    Appendix D - Network Migration D-13 Firmware Upgrade the v1.5.3 firmware will lose communications during this time, so a planned maintenance outage is necessary. It is only necessary to download 1 image of the Router to v1.5.3 and reset the Remotes in order for them to rejoin the network, unless the associated Burst Controller is running BFAT. If t ...

  • Cables to Go CDM-570 - page 134

    Firmware Upgrade D-14 Vipersat CDM-570/570L User Guide Figure D-18 Vipersat Configuration screen The Vipersat Migration Parameter "M" is available only on Hub non-expansion units. Figure D-19 Vipersat Migration prompt Select O to set the old framing mode to v1.5.2 or earlier. This parameter must be set in both outbound and inbound units t ...

  • Cables to Go CDM-570 - page 135

    Appendix D - Network Migration D-15 Firmware Upgrade The straggler Remotes will now frame on the T DM outbound signal. The asso- ciated Burst Controller(s) will frame on the inbound signals from these Remotes ONLY. Download the v1.5.3 Router firmware and Reset the straggler Remotes. Return the network to N (1.5.3) compatibility. ...

  • Cables to Go CDM-570 - page 136

    Firmware Upgrade D-16 Vipersat CDM-570/570L User Guide { This Page is Intentionally Blank } ...

  • Cables to Go CDM-570 - page 137

    Appendix E - Glossary E-1 A PPENDIX G LOSSARY A ALC A utomatic L imit C ontrol is a closed loop mechanis m controlling the gain stabilization of the HP A ’ s RF output power . APL A synchronous P arty L ine – A VIPERSAT term for RS-485 multi-drop bus used for control of indoor equipment. See also SPL. ARP A ddress R esolution P rotocol – A pr ...

  • Cables to Go CDM-570 - page 138

    E-2 Vipersat CDD-564L User’s Guide BPSK B inary P hase S hift K eying – A modulation technique in which the carrier is phase shifted +/- 180 degrees. See also QPSK C C-Band A frequency band commonly used for satellite communications (and sometimes terrestrial microwave). For terrestrial earth stations the receive frequency band is 3.7-4.2GHz an ...

  • Cables to Go CDM-570 - page 139

    Appendix E - Glossary E-3 E Eb/No Eb/No Ratio Eb = energy per bit No = noise power density per Hz. The bit error rate (BER) for digital data is a decreasing function of this ratio. Eb is the energy of an information bit. Eb is measured in Joules, or equivalently in Watts per Hertz. EEPROM E lectrical E rasable P rogrammable R ead O nly M emory. Thi ...

  • Cables to Go CDM-570 - page 140

    E-4 Vipersat CDD-564L User’s Guide Group ID A number assigned to equipme nt which defines it as a member of a group when addressed by the burst controller. GUI G raphical U ser I nterface – A form of graphical shell or user interface to a computer operating system. H HDLC H igh Level D ata L ink C ontrol – A standard defining how data may be ...

  • Cables to Go CDM-570 - page 141

    Appendix E - Glossary E-5 K Kb/s K ilo B its per S econd - 1000 bits/second. A measure of transmission speed. See also bps & Mb/s. Ku-Band A frequency band used for satellite communications. For terrestrial earth stations the receive frequency band is in the range 10.95 – 12.75GHz and trans- mit 14.0 – 14.5GHz. See also C-band. L L-Band A f ...

  • Cables to Go CDM-570 - page 142

    E-6 Vipersat CDD-564L User’s Guide N NAT N etwork A ddress T ranslation - An Internet standard that enables a local-area network (LAN) to use one set of IP addresses for interna l (private) traffic and a second set of addresses for external (public) traffic. NOC N etwork O peration C enter (NOC) has access to any earth station installed using the ...

  • Cables to Go CDM-570 - page 143

    Appendix E - Glossary E-7 R RF R adio F requency – A generic term for signals at frequencies above those used for baseband or IF. RFC R equest F or C omment – The de-facto Internet standards issued by the Internet Engineering Task Force (IETF). RIP R outing I nformation P rotocol RS-232 A common electrical/physical standard issued by the IEEE u ...

  • Cables to Go CDM-570 - page 144

    E-8 Vipersat CDD-564L User’s Guide T TCP/IP T ransmission C ontrol P rotocol / I nternet P rotocol – A standard for networking over unreliable transmission paths. See also UDP. TDMA T ime D ivision M ultiple A ccess – A multiple access technique where users contend for access to a c ommon channel on a time-shared bas is. See also FDMA and STD ...

  • Cables to Go CDM-570 - page 145

    Appendix E - Glossary E-9 W Wizard A specialized program which performs a specific function, such as installing an application (installation wizard). ...

  • Cables to Go CDM-570 - page 146

    E-10 Vipersat CDD-564L User’s Guide { This Page Intentionally Blank } ...

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