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Manual Multi-Tech Systems MMV1600

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  • Multi-Tech Systems MMV1600 - page 1

    MultiMux MMV1600/3200 Series Dat a/V oice/Fax Priority S t atistical Multiplexer Owner's Manual ...

  • Multi-Tech Systems MMV1600 - page 2

    NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial installation. This equipment generates, uses and can radiate radio frequen ...

  • Multi-Tech Systems MMV1600 - page 3

    Owners Manual 82020109 Revision J MultiMux (#MMV1600C) (#MMV3200C) This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi-Tech Systems, Inc. All rights reserved. Copyright © 1997, by Multi-Tech Systems, Inc. Multi-Tech Systems, Inc. makes no representations or warranties with respect t ...

  • Multi-Tech Systems MMV1600 - page 4

    T able of Content s Chapter 1 - Introduction and Description 1.1 Introduction .......................................................................................... 1-1 1.2 About This Manual ............................................................................... 1-1 1.3 Background ........................................................ ...

  • Multi-Tech Systems MMV1600 - page 5

    Chapter 5 - Commands 5.1 Introduction .......................................................................................... 5-1 5.2 Command Description ......................................................................... 5-5 5.2.1 General Commands ................................................................ 5-5 5.2.2 Channel Parameter ...

  • Multi-Tech Systems MMV1600 - page 6

    T ables 3-1 LED Indicators ..................................................................................... 3-2 4-1 Cabling Procedure ............................................................................... 4-1 4-2 V.35 Interface ....................................................................................... 4-4 4-3 Configuratio ...

  • Multi-Tech Systems MMV1600 - page 7

    1.1 Introduction Congratulations! Your new MultiMux MMV1600/3200 series is one of the finest statistical multiplexers on the market today. The MMV1600/3200 series high speed Priority Statistical Multiplexer (PSM) supports up to 16 or 32 asynchronous input channels, two synchronous composite links or a synchronous composite link and a sync data chan ...

  • Multi-Tech Systems MMV1600 - page 8

    Chapter 8- Service, Warranty and Tech Support Chapter 8 provides instructions on getting service for the MultiMux at the factory, a statement of the limited warranty, information about our user bulletin board service, and space for recording information about your multiplexer prior to calling Multi-Tech's Technical Support. ...

  • Multi-Tech Systems MMV1600 - page 9

    1.3 Background Any data communications environment that has more than one asynchronous line going between common locations can probably benefit by installing a pair of statistical multiplexers (stat muxes). A stat mux performs the function of combining several asynchronous data communication channels into one composite synchronous signal that can b ...

  • Multi-Tech Systems MMV1600 - page 10

    channels, there is considerable flexibility in the choice of the composite channel protocol and speed. The use of a synchronous protocol like HDLC provides for error detection and retransmission over the composite link. Thus, asynchronous terminals, which have no inherent error-recovery capability, can enjoy end-to-end data integrity. With the impl ...

  • Multi-Tech Systems MMV1600 - page 11

    received by the local telephone or fax machine. The voice/fax board has two identical voice/fax channels. Each channel can connect to a private branch exchange (PBX, a small telephone switch), a telephone or fax machine. Each channel has three connectors labeled E&M, FXO and FXS. The E&M (Ear and Mouth) connection is for connecting to the E ...

  • Multi-Tech Systems MMV1600 - page 12

    When the voice/fax board is used, connections can be made for either channel 1 or channel 2 or both channels and the types of connections are the same for both channels. If a PBX is being used at both the local and remote locations and an E&M trunk connection is desired, then the E&M connections are used for the desired channels. If a PBX i ...

  • Multi-Tech Systems MMV1600 - page 13

    1.5 System Features 1.5.1 Voice/Fax With the addition of the voice/fax board into the MultiMux, you now can have voice and fax traffic along with your normal data communications on the same composite link. The two voice/fax channels provide all the necessary interfaces to access a private branch exchange (PBX, a small telephone switch) and all the ...

  • Multi-Tech Systems MMV1600 - page 14

    DA T A DAT A CHANNEL DEVICE INITIA TED P ACING Channel Device Channel Device Mux Mux MUX INITIA TED FLOW CONTROL Pacing stops the output of data from the mux Flow control stops the input of data to the mux 1.5.7 Channel Switching A feature of the MultiMux MMV1600/MMV3200 series is its ability to switch channels between mux units. That is, an indivi ...

  • Multi-Tech Systems MMV1600 - page 15

    port is also connected to a printer, the reports can provide an easy means of generating data for better network management. 1.5.13 Dynamic Buffering A basic requirement of all muxes is some sort of buffering capability to temporarily hold channel data while it is being assembled into a block. In the early days, a mux was sometimes judged by the si ...

  • Multi-Tech Systems MMV1600 - page 16

    1.6 FCC Regulations for Telephone Line Interconnection 1. This equipment complies with Part 68 of the FCC rules. On the outside surface of this equipment is a label that contains, among other information, the FCC registration number and ringer equivalence number (REN). If requested, this information must be provided to the telephone company. 2. A s ...

  • Multi-Tech Systems MMV1600 - page 17

    1.8 Specifications 1.8.1 Async Data Channels Number of Channels Up to sixteen (#MMV16XXC), or up to thirty-two (#MMV32XXC) Maximum Speed 19,200 bps All Channels Channel Speeds All standard speeds from 300 bps to 19.2K bps Data Format Asynchronous: 5, 6, 7, or 8 data bits, with 1,1.5, or 2 stop bits Parity Odd, even, or none Local Echo On or off sel ...

  • Multi-Tech Systems MMV1600 - page 18

    1.8.6 Voice Channels Number of Channels Two independent channels Voice Digitization Rates 9600 and 16K bps Automatic Fax Group 3 Fax Rates Modulation/ (2400, 4800, 7200 and 9600) Demodulation Interfaces E&M 2 and 4 wire, FXS, FXO Signaling DTMF Line Interface RJ48 Jack for E&M and RJ11 Jacks for FXS and FXO 1.8.7 Command Modem: Description ...

  • Multi-Tech Systems MMV1600 - page 19

    2.1 Introduction The MultiMux MMV1600/MMV3200 Series is available in two models, a sixteen and thirty-two channel unit with an internal command modem, optional composite link DSUs and two optional voice/fax channels, dial-up capability from a remote location into the command modem and a command port for local AT command configuration information. T ...

  • Multi-Tech Systems MMV1600 - page 20

    2.2 Configuration 1 Configuration 1 is a data-only configuration. This configuration has two Multi-Tech MultiMux MMV1616C/56 which are sixteen channel multiplexers with internal 56K bps composite link DSUs linking sites one and two over a Digital Data Service (DDS) network provided by your telco facility. The local site has the MMV1616C/56 connecte ...

  • Multi-Tech Systems MMV1600 - page 21

    Configuration 1 Local Site Channel Parameters Local Channel Parameters/ Node #02 STP FLOW ENQ/ PASS PASS DEST DEST LINK CHN SPD WD BIT PAR CTRL ACK ECHO PACE EIA XON CHN NODE A/B 01 19200 8 1 NONE XO N/XOFF OFF OFF OFF OFF OFF 01 01 A 02 19200 8 1 NONE XO N/XOFF OFF OFF OFF OFF OFF 02 01 A 03 19200 8 1 NONE XO N/XOFF OFF OFF OFF OFF OFF 03 01 A 04 ...

  • Multi-Tech Systems MMV1600 - page 22

    2.3 Configuration 2 Configuration 2 is two MultiMux MMV1616C sixteen channel multiplexers with two external Multi-Tech 56K bps Digital Service Units (DSUs) linking the two sites over a Digital Data Service (DDS) network. The RS232C interface on The DSUs is connected to COMPOSITE LINK A EXTERNAL MODEM/DSU connector on the back panel of the MMV1616C. ...

  • Multi-Tech Systems MMV1600 - page 23

    2.4 Configuration 3 Configuration 3 (Figure 2-3) is the networking configuration with one MultiMux MMV1616C and two MMV1608 multiplexers with the multiplexer at remote site 1 (Node 2) utilizing dual composite links. This networking configuration allows the local site (Node 1) with the host minicomputer to communicate with remote sites 1 and 2. Remo ...

  • Multi-Tech Systems MMV1600 - page 24

    communicating with Node 3. Node 1 is configured with channels one through eight assigned a destination node of 2 and channels nine through sixteen assigned a destination node of 3. Node 2 has channels one through eight set with a destination node of 1 which is the local site. Node 3 has channels one through eight set for destination channels nine t ...

  • Multi-Tech Systems MMV1600 - page 25

    2.5 Configuration 4 Configuration 4 is the data/voice/fax configuration with two MultiMux MMV1608C/56/V multiplexers with single composite link connecting a minicomputer and the station side of a PBX at the local site to a group of remote terminals and printer on the data part of the network and a telephone and fax machine on the remote voice/fax c ...

  • Multi-Tech Systems MMV1600 - page 26

    commands. Whether the second voice/fax channel is used depends on whether one or two instruments (telephone or fax machine) are connected. The parameters for the remote site can be displayed using the VL (List the Voice/Fax Channel Parameters) command. The voice/fax channel parameters for the remote site are shown in the Configuration 4 Remote Site ...

  • Multi-Tech Systems MMV1600 - page 27

    2.6 Configuration 5 Configuration 5 is the data/voice/fax configuration with two MultiMux MMV1608C/56/V multiplexers with single composite link connecting a minicomputer and a PBX trunk at the local site to a group of remote terminals and printer on the data part of the network and a second PBX trunk on the voice/fax channels. The E&M configura ...

  • Multi-Tech Systems MMV1600 - page 28

    Configuration 5 Local site Voice/Fax Channel Parameters LOCAL VOICE/FAX PARAMETERS CHANNEL1 LOCAL VOICE/FAX PARAMTERS CHANNEL 2 PARAMETER STATUS PARAMETER STATUS DESTINATION CHANNEL: 01 DESTINATION CHANNEL: 02 DESTINATION NODE: 01 DESTINATION NODE: 01 LINK A/B/D: A LINK A/B/D: A DIGITIZING RATE: 16000 DIGITIZING RATE: 16000 OUTPUT LEVEL ATTEN.: 14 ...

  • Multi-Tech Systems MMV1600 - page 29

    2.7 Configuration 6 Configuration 6 is the data/voice/fax configuration with two MultiMux MMV1608C/56/V multiplexers with single composite link connecting a minicomputer and a telephone and/or fax machine at the local site to a group of remote terminals and printer on the data part of the network and a second set of telephone and/or fax machine on ...

  • Multi-Tech Systems MMV1600 - page 30

    Configuration 6 Local Site Voice/Fax Channel Parameters LOCAL VOICE/FAX PARAMETERS CHANNEL1 LOCAL VOICE/FAX PARAMTERS CHANNEL 2 PARAMETER STATUS PARAMETER STATUS DESTINATION CHANNEL: 01 DESTINATION CHANNEL: 02 DESTINATION NODE: 01 DESTINATION NODE: 01 LINK A/B/D: A LINK A/B/D: A DIGITIZING RATE: 16000 DIGITIZING RATE: 16000 OUTPUT LEVEL ATTEN.: 12 ...

  • Multi-Tech Systems MMV1600 - page 31

    2.8 Configuration 7 Configuration 7 is the data/voice/fax configuration with two MultiMux MMV1608C/56/V multiplexers with single composite link connecting a minicomputer and a PBX E&M trunk at the local site to a group of remote terminals and printer on the data part of the network and a telephone and/or fax machine on the remote voice/fax chan ...

  • Multi-Tech Systems MMV1600 - page 32

    Configuration 7 Local Site Voice/Fax Channel Parameters LOCAL VOICE/FAX PARAMETERS CHANNEL1 LOCAL VOICE/FAX PARAMTERS CHANNEL 2 PARAMETER STATUS PARAMETER STATUS DESTINATION CHANNEL: 01 DESTINATION CHANNEL: 02 DESTINATION NODE: 01 DESTINATION NODE: 01 LINK A/B/D: A LINK A/B/D: A DIGITIZING RATE: 16000 DIGITIZING RATE: 16000 OUTPUT LEVEL ATTEN.: 12 ...

  • Multi-Tech Systems MMV1600 - page 33

    2.9 Configuration 8 Configuration 8 is a LAN to LAN configuration with two MultiMux MMV1608C/56/V multiplexers with a single composite link. The muxes are connecting two local area networks (LANs) through the Sync Data Channel, connecting a communications server on one LAN to a minicomputer at a remote site and connecting voice/fax communications b ...

  • Multi-Tech Systems MMV1600 - page 34

    Chapter 3 - ...

  • Multi-Tech Systems MMV1600 - page 35

    4.1 Introduction This chapter explains how to unpack and install your MultiMux cabinet. 4.2 Unpacking Unpack and check all the items in the MultiMux shipping list to ensure that you have received the correct options and accessories. MultiMux Components A. MultiMux Cabinet B. Owner's Manual C. Power cord D. RJ48 phone cable (for internal DSU) E ...

  • Multi-Tech Systems MMV1600 - page 36

    Sync Data Channel - Port B only If Port B is being connected to a synchronous device, connect the back-to-back cable supplied with your MultiMux to the COMPOSITE LINK B (RS232C/V.35) EXTERNAL MODEM/DSU connector on the back panel of the MultiMux and the other end of the cable to the RS232C connector on the synchronous device. Refer to the synchrono ...

  • Multi-Tech Systems MMV1600 - page 37

    Figure 4-2. Composite Link Cabling 2 Loosen the two pc board chassis lock screws on the back panel. See Figure 4-2. 3 Pry up on the two pc board chassis lock screws to unlock the pc boards in the chassis. Temporarily retighten these screws while in the up position. 4 Disconnect the pc board power cable from the power supply. See Figure 4-3. 5 Parti ...

  • Multi-Tech Systems MMV1600 - page 38

    Figure 4-4. Shunts 11 Partially slide the Aggregate board into the chassis. 12 If the Voice/Fax board is in the chassis, connect the short ribbon cable between the Aggregate board and the Voice/Fax board. This ribbon cable goes on the front left side of the Aggregate board and is the only connector on the Voice/Fax board. Table 4-2. V.35 Interface ...

  • Multi-Tech Systems MMV1600 - page 39

    3 If you are connecting a supervisory console to the MultiMux, connect a terminal or PC to the COMMAND PORT connector via an appropriate RS232C cable. The PC must be running communications software. Note Any cables connected to the computer should be shielded to reduce interference. 4 Apply power to the supervisory console and enter AT and then hit ...

  • Multi-Tech Systems MMV1600 - page 40

    As you change parameters, they will not actually be incorporated into your running system until you execute a Store New Parameters ( &W ) command. Table 4-3. Configuration Procedure Step Procedure Async Channels 14 Execute the parameter display command to display the current channel parameter status for your local MultiMux by entering the follo ...

  • Multi-Tech Systems MMV1600 - page 41

    17 Based on the listed conditions for the Voice/Fax channels, reconfigure the parameters to match your actual Voice/Fax channel requirements by entering commands as described in Chapter 5. As you change parmeters, they will not actually be incorporated into your running system until you execute a Store New Parameters ( &W ) command. ...

  • Multi-Tech Systems MMV1600 - page 42

    5.1 Introduction This chapter presents a command summary followed by a detailed description of each command used in the MultiMux. Each command line must begin with a prefix of AT and may contain any number of commands in a string (no spaces) up to a limit of 40 characters. Most commands include a value and are part of the 40 character total. Hittin ...

  • Multi-Tech Systems MMV1600 - page 43

    F14 Xoff/Xon Character Pacing I0-2 Identification Commands L,L0 List all Channel Parameters L1-L32 List individual Channel Parameters ML Link Used Per Channel P0 Parity None P1 Parity Odd P2 Parity Even R Response Time Priority SB Stop Bit Selection SN Local Source Node Number Table 5-1. Command Summary (Cont.) TYPE COMMAND DESCRIPTION Channel SNGA ...

  • Multi-Tech Systems MMV1600 - page 44

    &T5 Digital Loop &T6 Not Functional &T7 Switch and LEDs &T8 Memory Test &T9 Watch Dog Timer Test &T10 Internal Modem Memory Test &T11 Quick Brown Fox Message Test &T12 Voice/Fax Loopback Test &T13 Sync Data Channel Loopback Test Command A/ Repeat Last Command Modem A Answer B Communications Standard (Bell/CCITT) ...

  • Multi-Tech Systems MMV1600 - page 45

    Store New The Store New Parameters command causes the MultiMux to Parameters store new parameters. Prior to executing the &W command, changes to MultiMux parameters are temporary and do not &W affect the units operation until you execute the &W command. The &W command stores the parameters in nonvolatile memory and will takes aff ...

  • Multi-Tech Systems MMV1600 - page 46

    $DSUACL - SELECTS CLOCKING FOR INTERNAL DSU LINK A. $DSUBCL - SELECTS CLOCKING FOR INTERNAL DSU LINK B. $DSUASP - SELECTS SPEED FOR INTERNAL DSU LINK A. $DSUBSP - SELECTS SPEED FOR INTERNAL DSU LINK B. EXTERNAL DSU/MODEM $MUXACL - SELECTS CLOCKING WHEN USING EXTERNAL DSU/MODEM PORT A. $MUXBCL - SELECTS CLOCKING FROM EXTERNAL SYNC DEVICE ON PORT B. ...

  • Multi-Tech Systems MMV1600 - page 47

    COMMAND EXAMPLE : ATV2LIFXSL- SETS THE LOCAL INTERFACE OF CHANNEL 2 TO FXS WITH LOOP START. FOR HELP ON A SPECIFIC COMMAND, ENTER ATH FOLLOWED BY A COMMAND LETTER. 5.2.2 Channel Parameter Commands Channel Off The channel off command turns the selected channel off. This Command command turns off a particular channel or all channels depending o ...

  • Multi-Tech Systems MMV1600 - page 48

    data transfers are regulated so that no data is lost. DA T A DA T A CHANNEL DEVICE INITIA TED P ACING Channel Device Channel Device Mux Mux MUX INITIA TED FLOW CONTROL Flow control stops the input of data to the mux Pacing stops the output of data from the mux ENQ/ACK These two commands control the selection of a special flow Flow Control control s ...

  • Multi-Tech Systems MMV1600 - page 49

    Xon/Xoff Flow Control and Pacing, you will F11-F12 end up with Xon/Xoff Pacing, and with CTS Flow Control plus Pacing, data flow will be controlled by the presence of the DTR (pin 20) signal on the RS232 interface. F11 turns on Inverted DTR so that a high signal stops data flow and a low starts data flow. F1 2 turns off Inverted DTR so that it acts ...

  • Multi-Tech Systems MMV1600 - page 50

    operations, do not use too much of the buffer and reduce the throughput of the other channels to unsatisfactory levels. In such cases, the interactive user who needs immediate responses would experience unreasonable delays. The Response Time Priority numbers 0, 1, 2, 3 establish the relative time each group of channels must wait for data. The lower ...

  • Multi-Tech Systems MMV1600 - page 51

    Select Local The Select Local Parameters command lists the local channel Parameters parameters and enables you to update them. After execution of this command, all other commands will act on the local &SL parameter set. An &W command stores the parameters. When power is turned on, the local parameter mode is in effect. Select The Select Dow ...

  • Multi-Tech Systems MMV1600 - page 52

    When the Sync Data Channel is used and the MultiMux is providing the clocking, a word of caution; the Mux Speed command should not be set so high that the Sync Data Channel over runs the composite link. Things to consider are that if a voice/fax board is installed, voice takes the highest priority (voice compression is either 9.6K or 16K of the ban ...

  • Multi-Tech Systems MMV1600 - page 53

    EXTERNAL 64K INTERNAL OFF CONFIGURATION OF PORT A: COMPOSITE LINK DSU TYPE SPEED CLOCKING LOOPBACK EXTERNAL 56K INTERNAL OFF CONFIGURATION OF PORT B: SYNC DATA PROTOCOL SPEED CLOCKING LOOPBACK ANY SDLC 56K INTERNAL OFF List Composite This command lists the status of the link configuration parameters. Link Settings The display indicates the conditio ...

  • Multi-Tech Systems MMV1600 - page 54

    E L EE E L EE T O MS T O MS CR C O T CR C O T AA T T AA T T RN R E RN R E RS L M RS L M IR X C M RD O IR X C M R D O E CM T I C W D E CM T I CW D RV TS T V N E RV T S T V N E #X X # #X X # 5.2.5 Voice/Fax Channel Commands The Voice/Fax Channel commands control the traffic of the voice and fax communication over the composite link network. T h e Voi ...

  • Multi-Tech Systems MMV1600 - page 55

    2 to transfer data using the dynamic link selection which allows the MultiMux to select the least busy link. Voice/Fax Channel The Voice/Fax Channel Digitizing Rate command selects from Digitizing Rate two digitized or compressed rates 9600 or 16000 bps. At the 16000 bps rate, the voice transmission will be clearer. The V(1/2)DR V1DR9600 places voi ...

  • Multi-Tech Systems MMV1600 - page 56

    4.75db V(1/2)OL8 -6.0db 4.0db V(1/2)OL9 -6.75db 3.25db V(1/2)OL10 -7.5db 2.5db V(1/2)OL11 -8.25db 1.75db V(1/2)OL12 -9.0db 1.0db V(1/2)OL13 -9.75db 0.25db V(1/2)OL14 - 10.5db -0.5db V(1/2)OL15-11.25db -1.25db V(1/2)OL16 -12.0db -2.0db V(1/ 2)OL17 -12.75db -2.75db V(1/2)OL18 -13.5db -3.5db V(1/2)OL19 -14.25db - 4.25db COMMAND LEVEL COMMAND LEVEL 2-W ...

  • Multi-Tech Systems MMV1600 - page 57

    ATV(1/2)LIFXSL FXS w/Loop Connects a single Start Line telephone/fax with a loop start line to the mux. ATV(1/2)LIE&M(1-5) E&M Interface Connects to E&M trunk (D/W)(2-4) side of a PBX. (1-5) Selects E&M type 1-5. (D/W) Selects E&M dial or wink (2/4) Selects E&M 2 or 4-wire Voice/Fax Channel The Voice/Fax Remote Channel Inter ...

  • Multi-Tech Systems MMV1600 - page 58

    Test Mode 7 Test Mode 7 is the Switch and LED operational test. By running your MultiMux in this test mode, you can switch the eight &T7 DIP-switches and verify that they work by corresponding LEDs being lit. Test Mode 8 Test Mode 8 is the Non-Volatile Memory test. Its function is to check the proper operation of the MultiMuxs storage of ope ...

  • Multi-Tech Systems MMV1600 - page 59

    6.1 Introduction The following procedures assume that your MultiMuxes (local and remote) have been installed properly (refer to Chapter 4) and the appropriate channel devices have been connected to each channel. 6.2 MultiMux Operating Procedures The MultiMux operating procedures cover entering parameters for both your local and remote MultiMux unit ...

  • Multi-Tech Systems MMV1600 - page 60

    The following will be displayed on your system monitor if your MultiMux is configured with Port B as a synchronous data channel: Configuration of Port A: Composite Link DSU TYPE SPEED CLOCKINGLOOPBACK EXTERNAL 56K INTERNAL O FF Configuration of Port B: Sync Data DSU TYPE SPEED CLOCKINGLOOPBACK ANY SDLC 56K INTERNAL OF F Based on the listed composit ...

  • Multi-Tech Systems MMV1600 - page 61

    8To reconfigure a channel based on your actual channel requirements, enter commands as described in Chapter 5 of this manual. To save new parameters, you must again execute an AT&W command. 9If you are downline loading remote parameters, 8-position DIP switch SW1 must be in the UP (open) position; refer to the 8-position DIP Switch in the Confi ...

  • Multi-Tech Systems MMV1600 - page 62

    DIALTONE/WINK (E&M): N/A DIALTONE/WINK (E&M): N/A WINK TIMER N/A WINK TIMER N/A REMOTE INTERFACE TYPE: FXS REMOTE INTERFACE TYPE: FXS GROUND/LOOP START (FXS): LOOP GROUND/LOOP START (FXS): LOOP 2 OR 4 WIRE (E&M): 2 WIR E 2 OR 4 WIRE (E&M): 2 WIRE DIALTONE/WINK (E&M): N/A DIALTONE/WINK (E&M): N/A Table 6-2. Voice/Fax Operatin ...

  • Multi-Tech Systems MMV1600 - page 63

    Table 6-2. Command Modem Operating Procedures (Cont.) Step Procedure 4You are now communicating with your remote MultiMux. Any commands you now execute will be done by the remote unit. For instance, to request status of the remote system execute the List Channel Parameters Command by entering the following: ATL (hit Return) The following, which wil ...

  • Multi-Tech Systems MMV1600 - page 64

    7.1 Introduction The MultiMux is designed to make it easy to operate and maintain. The procedures in this chapter will help isolate any problem you have to a specific component of your network, at which point you will be instructed to call the appropriate personnel or execute commands to adjust operating conditions. There are no specific repair pro ...

  • Multi-Tech Systems MMV1600 - page 65

    7.3 Test Cables If you are using the MultiMux internal DSU, there are two test cables provided which can be used to help checkout your system (refer to Figure 7-1). The MultiMux Test cable is a special back-to-back composite link test cable that can connect your two MultiMuxes locally before installing them using a phone line. This cable will allow ...

  • Multi-Tech Systems MMV1600 - page 66

    not communicating not installed on Supervisory supervisory console, refer to comm with mux command Console. software users manual forinstallation. port 2. Bad cable or cable 1. Check RS232 cable connections connection between superv isory console and COMMAND PORT on MultiMux for loose connection or bent pins, refer to Supervisory Console Install ...

  • Multi-Tech Systems MMV1600 - page 67

    RD LEDs ON 2. Connect composite link cable between mux and modem. Composite link and all 1. Mux memory failure 1. Enter ATL and record all channel channels down with parameters before running memory RD and all channel test. Perform memory test by entering RCV LEDs ON &T2 command. All stored parameters will be destroyed. 2. Reconfigure all chann ...

  • Multi-Tech Systems MMV1600 - page 68

    T able 7-2. V oice/Fax T roubleshooting Guide Condition Possible Cause Corrective Action Volume levels not 1. Input level gain setting too 1. Increase input level gain setting on sufficient on local low on remote voice/fax remote voice/fax channel a couple voice/fax channel channel. db and recheck voice quality, refer to the V(1/2)IL command in Cha ...

  • Multi-Tech Systems MMV1600 - page 69

    interface connector type. 3. Voice/fax ribbon cable 1 . R e c onnect the voice/fax ribbon cable n o t connected. between the voicefax and aggregate board. Refer to the installation procedures in Chapter 4. 2. Call Tech Support for assistance, refer to Chapter 8. 4. MV2 Board failure 1. Perform the voice/fax loopback test (test 12), refer to voice/f ...

  • Multi-Tech Systems MMV1600 - page 70

    7.5 Channel Device Testing The first step in system testing is to check the operation of the multiplexer network section from each channel device to the MultiMux and back again to the channel device. These procedures will let you see if data from the channel device is passing through the MultiMux properly, by echoing channel keystrokes through the ...

  • Multi-Tech Systems MMV1600 - page 71

    7.6 DSU and Communications Line Testing After determining that the channel-device-to-MultiMux portion of the multiplexer network is operating properly, the next steps are to check the operation of the local DSU, the communications line and the remote DSU. By performing the procedures in Table 7-4, the MultiMux can send data (keystrokes) from the ch ...

  • Multi-Tech Systems MMV1600 - page 72

    7.7 MultiMux Functional Testing Procedures There are tests available on the MultiMux which check various functions within the MultiMux logic. These tests will assist you in trouble shooting problems which are not related to the composite communications channel or local channel devices. The two tests described below will check the non-volatile memor ...

  • Multi-Tech Systems MMV1600 - page 73

    7.8 Voice/Fax Channel Testing The voice/fax loopback test is confined to the MultiMux that the test is being run on. the loopback test communicates between the two channels on the voice/fax board without going outside the MultiMux. An important factor to consider before running this test is to ensure that the local and remote interfaces for both ch ...

  • Multi-Tech Systems MMV1600 - page 74

    7.9 Sync Data Channel Testing The Sync Data Channel Loopback test is used when the MultiMux has configured Port B for the sync data mode. This test simulates a modem or DSU in sync loopback mode. To use this test, configure the synchronous device for loopback test in which port B loops the data back to the synchronous device. T able 7-7. Sync Dat a ...

  • Multi-Tech Systems MMV1600 - page 75

    Chapter 8 - Service, W arranty and T ech Support Warranty Multi-Tech Systems, Inc., (hereafter MTS) warrants that its products will be free from defects in material or workman- ship for a period of two, five, or ten years (depending on model) from date of purchase, or if proof of purchase is not provided, two, five, or ten years (depending on ...

  • Multi-Tech Systems MMV1600 - page 76

    Extended two-year overnight replacement service agreements are available for selected products. Please call MTS at (888) 288-5470, extension 5308 or visit our web site at http://www.multitech.com/programs/orc/ for details on rates and coverages. Please direct your questions regarding technical matters, product configuration, verification that th ...

  • Multi-Tech Systems MMV1600 - page 77

    Appendix A ASCII Character Code/Hex/Decimal Conversion Chart CTRL CODE HEX DEC CODE HEX DEC CODE HEX DEC CODE HEX DEC @ NUL 00 0 SP 20 32 @ 40 64 60 96 A S OH 01 1 ! 21 33 A 41 65 a 61 97 B ST X 02 2  22 34 B 42 66 b 62 98 C ETX 03 3 # 23 35 C 43 67 c 63 99 D EOT 04 4 $ 24 36 D 44 68 d 64 100 E E NQ 05 5 % 25 37 E 45 69 e 65 101 F AC K 06 6 & ...

  • Multi-Tech Systems MMV1600 - page 78

    Appendix B RS232C Interface Specification The MultiMux RS232C interface circuits have been designed to meet the electrical specifications given in the EIA (Electronic Industries Association) RS232C and CCITT (Consultative Committee of International Telegraph and Telephone) standards. All signals generated by the mux are approximately 10 volts when ...

  • Multi-Tech Systems MMV1600 - page 79

    Appendix C Cabling Diagrams Channel Cable DCE to Channel cabling (with EIA pass Thru) PIN NO. 1 2 3 4 5 6 7 8 20 22 25 1 2 3 4 5 6 7 8 20 22 25 To MultiMux Channel Connector To DCE Device (Communication Device i.e. Modem) CHASSIS GROUND (AA) TRANSMIT DA T A (BA) RECEIVE DA T A (BB) REQUEST TO SEND (CA) CLEAR TO SEND (CB) DA T A SET READY (CC) SIGNA ...

  • Multi-Tech Systems MMV1600 - page 80

    Command Port Cables DCE to DCE cabling PIN NO. 1 2 3 4 5 6 7 8 20 22 25 1 2 3 4 5 6 7 8 20 22 25 To MultiMux Command Port Connector To DCE Device (Communication Device i.e. Modem) CHASSIS GROUND (AA) TRANSMIT DA T A (BA) RECEIVE DA T A (BB) DA T A SET READY (CC) SIGNAL GROUND (AB) DA T A TERMINAL READY (CD) PIN NO. DCE to DTE cabling PIN NO. 1 2 3 ...

  • Multi-Tech Systems MMV1600 - page 81

    PIN NO. 1 2 3 4 5 7 8 15 17 20 25 1 2 3 4 5 7 8 15 17 20 25 To External Synchronous Modem/DSU Connector To MultiMux External Modem/DSU Connector CHASSIS GROUND (AA) TRANSMIT DA T A (BA) RECEIVE DA T A (BB) REQUEST TO SEND (CA) CLEAR TO SEND (CB) SIGNAL GROUND (AB) CARRIER DETECT (CF) TRANSMIT CLOCK (DB) RECEIVE CLOCK (DD) DA T A TERMINAL READY (CD) ...

  • Multi-Tech Systems MMV1600 - page 82

    25-PIN CONNECTOR (FEMALE) 1 2 3 4 5 7 6 8 15 17 20 24 1 3 2 5 4 7 20 24 6 8 15 17 Frame Ground Transmit Data Receive Data Request T o Send Clear T o Send Signal Ground Data Set Ready Carrier Detect Transmit Clock Receive Clock Data T erminal Ready Internal Clock 25-PIN CONNECTOR (FEMALE) Frame Ground (AA) Receive Data (BB) Transmit Data (BA) Clear ...

  • Multi-Tech Systems MMV1600 - page 83

    E&M (I-V) Voice/Fax Channel Cable White-Green Green-White White-Orange White-Blue Blue-White Orange-White Brown-White White-Brown M Input E Output T1 4-Wire Output R 4-Wire Input, 2-Wire T 4-Wire Input, 2-Wire R1 4-Wire Output SG (Signal Ground) Output SB (Signal Battery) Output E&M CABLE RJ45 Plug * Cable wire is solid 24AWG. If connecting ...

  • Multi-Tech Systems MMV1600 - page 84

    Appendix D Command Modem Commands Answer A The Answer Mode forces the command modem into answer mode. Entering ATA when in the Command mode will immediately bring the command modem off-hook, out of the command mode and into the On-Line Answer mode, and cause it to retransmit its carrier signal over the phone line. If no responding carrier tone is r ...

  • Multi-Tech Systems MMV1600 - page 85

    Hanging Up, You can make the command modem hang up (go On Hook), or and go Off Hook, with the H command. Entering ATH1 (upper case) Bringing the will bring the line Off Hook just as if you had picked up the Phone Line telephone handset. The command modem remains in command Off Hook mode. H0-1 You can hang up by entering ATH0 o r ATH (remember that ...

  • Multi-Tech Systems MMV1600 - page 86

    in the when the command letter R is entered at the end of a Dialing dialing command. When this is done, the command modem will switch to Answer mode as soon as the number is dialed R and then transmit a carrier signal to the other modem. For example, entering ATD5551212R and hitting Return would cause the number 555-1212 to be dialed and cause the ...

  • Multi-Tech Systems MMV1600 - page 87

    13 DATA Command modem connected as data modem during auto answer. You can also choose to completely eliminate the display of all of the Result Codes. This is accomplished by executing the Q command. View Active The View Active Configuration and User Profiles &V command Configuration displays the commands and S-Register settings along with the a ...

  • Multi-Tech Systems MMV1600 - page 88

    The ATX4 command causes the command modem to wait for a dial tone before dialing. This command is referred to as the smart dialing method where as the ATX3 command is referred to as blind dialing. The CONNECT xxxx result codes are activated and the BUSY result code is enabled if a busy signal is detected from the called command modem. The ATX4 comm ...

  • Multi-Tech Systems MMV1600 - page 89

    pause is desired, more than one comma may be entered , consecutively, with each one causing a two second pause. You also have the option of changing the length of the pause of the comma, from two seconds to any other value from 0 up to 255 seconds. This is accomplished by accessing S-Register S8, which we explain in Appendix E. Each comma used in a ...

  • Multi-Tech Systems MMV1600 - page 90

    Appendix E Indicators/Switches and Connectors Indicators Figure E-1. M ultiMux Front Panel Table E-1. LED Indicators Indicator Description Channel XMT/RCV The Channel Transmit (XMT) and Receive (RCV) indicators show the activity level on each channel. MultiMux MMV1608 uses Channel One through Channel Eight indicators, MMV1616 uses Channel One throu ...

  • Multi-Tech Systems MMV1600 - page 91

    FCR The Flow Control Received (FCR) indicator lights when the remote MultiMux's buffers are full and the local MultiMux has been told to stop sending data. The FCR indicator will only come On when flow control is active. The FCR indicator lights for both internal DSU and an external link device. RD The Remote Down (RD) indicator lights when th ...

  • Multi-Tech Systems MMV1600 - page 92

    Figure E-2. B ack Panel ON/OFF Switch This switch provides AC power to the MultiMux when placed in the On (UP) position and removes power when in the OFF (down) position. Power Connector The power connector is a receptacle for the 3-prong grounded power cord supplied with the MultiMux. CHANNEL 1-16, CHANNEL 1-32 Channel 1 through channel 16 or chan ...

  • Multi-Tech Systems MMV1600 - page 93

    The voice/fax channel 2 E&M (Ear and Mouth) connector is used to connect channel 2 of the MultiMux to the trunk side of the local private branch exchange (PBX, a small switch). This connector is used when the voice/fax feature is included in the MultiMux. The E&M connector is an RJ48S 8-position keyed jack. VOICE/FAX CHANNEL 2 FXS Connector ...

  • Multi-Tech Systems MMV1600 - page 94

    The aggregate board 8-position DIP switch SW-5 is shown in Figure E-3 and the function of each position is as follows: Switch position 1: Closed Initiate Downline Load Off Open(UP) Initiate Downline Load On (used for downline loading only) Switch position 2: Closed External Link A Device Selected Open (UP) Internal Link A DSU Selected Switch Positi ...

  • Multi-Tech Systems MMV1600 - page 95

    Appendix F Flow Control Background Flow control refers to the techniques used by computer devices and multiplexers to stop and restart the flow of data from each other. Flow control is necessary so that a channel device does not receive more data than it can handle or vice versa (the MultiMux receives more data than its buffers can accommodate). Fl ...

  • Multi-Tech Systems MMV1600 - page 96

    In the example below, the flow control on the minicomputer works as follows: 1 2 3 4 5 6 7 8 Mux Link Channel Mini- Computer A. B. C. D. mux process data to the link mux buffers full mux buffers empty mux processes data to the link Data Flow Control off Flow Control on Data A. Data volume from the mini for any particular channel is appropriate for ...

  • Multi-Tech Systems MMV1600 - page 97

    Printer pacing and Flow Control The example below shows how Pacing and Flow Control work on a printer. (Host) Mini- Computer Channel MUX Link MUX Channel (Remote) Printer 1 1 A. B. C. D. E. F. G. H. Printer Prints Data Print Buffer Full Print Data Pace off Flow Control off Flow Control off Flow Control on Flow Control on Printer Prints Data Print D ...

  • Multi-Tech Systems MMV1600 - page 98

    Glossary of T erms A AC (Alternating Current): A power source whose signal crosses a reference voltage (usually called ground or zero). Alternating between a maximum and minimum voltage, AC may also be referred to as a bipolar signal. Contrast with DC. ACK (ACKnowledgement code) (pronounced "ack"): A communications code sent from a receiv ...

  • Multi-Tech Systems MMV1600 - page 99

    Bit-synchronous transmission: A synchronous form of data transmission that focuses on a maximum packet size rather than the length of the characters the packet contains. SDLC is a bit-synchronous protocol. Boot: To start or restart your PC. This term originates from the saying " to pull oneself up by the bootstraps". Bps (bits per second) ...

  • Multi-Tech Systems MMV1600 - page 100

    Device driver: Software that controls how a computer communicates with a device, such as a printer or mouse. Digital signal: Digital devices, such as terminals and computers, transmit data as a series of electrical pulses which have discrete jumps rather than gradual changes. Digital Transmission: A method of electronic information transmission com ...

  • Multi-Tech Systems MMV1600 - page 101

    Frequency: A characteristic of an electrical or electronic signal which describes the periodic recurrence of cycles. Frequency is inversely proportional to the wavelength or pulse width of the signal (i.e., long wavelength signals have low frequencies and s hort wavelength signals yield high frequencies). Full-duplex: A method of transmitting and r ...

  • Multi-Tech Systems MMV1600 - page 102

    Modem: A communications device that enables a computer to transmit information over a telephone line. It converts the computer's digital signals into analog signals to send over a telephone line and converts them back to digital signals at the receiving en d. Modems can be internal and fit into an expansion slot, or external and connect to a s ...

  • Multi-Tech Systems MMV1600 - page 103

    Rack: A frame or cabinet into which components are mounted. The industry standard rack is 19" wide and has variable depth and height. Rackmount: A packaging style available for many types of electronic equipment which enables the installer to mount the equipment in an industry standardized enclosure. The rackmount equipment is fitted with brac ...

  • Multi-Tech Systems MMV1600 - page 104

    V.22bis: The CCITT modulation standard for 2400 bps, full-duplex transmission over a dial-up or 2-wire leased line. V.23: The CCITT modulation standard for 75/1200 bps, half-duplex transmission over dial-up lines. This is not common in North America. V.24: The CCITT hardware interface specification for interchange circuits between the DTE and DCE. ...

  • Multi-Tech Systems MMV1600 - page 105

    Index Symbols &W Command .. .. . .. .. .. . .. .. .. .. . .. .. .. .. . .. .. .. .. . 5- 5 2400 BPS MODEM DIAL-UP LINE Connector 3-5, 4-5 25-pin Female D Connectors . .. ... .. ... ... . 1-17 4-Position DIP Switch .. ... ... ... ... .. ... ... ... . 3-10 8-Position DIP Switch SW1 .... .. ... .. ... .. .. .. 6-4 A Additional Composite Link Comma ...

  • Multi-Tech Systems MMV1600 - page 106

    Command Modem Select Command #MA1 5-27 COMMAND PORT .. ..... ..... .... ..... .... 1-8, 1-9 Command Port . ... ... .. ... ... .. ... .. ... ... 1-1, 1-12 Command Port Cables .. .. ... .. ... .. ... .. ... .. .. C-2 COMMAND PORT Connector .... .... .... ... 4-5 COMMAND PORT TERMINAL/PC Connector 3-6 Command Summary ... .. ... .. ... .. ... .. ... .. ...

  • Multi-Tech Systems MMV1600 - page 107

    .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. ... .. .. 4-1, C-5 E&M to E&M .... .... .... ..... .... .... .... .... .... .... . 2-1 E&M Wink .. .. . .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. . .. .. .. .. . 2-1 Ear and Mouth .... ... ... ... .. ... ... ... ... ... ... .. ... . 1-6 Ear and Mouth (E&M) Indica ...

  • Multi-Tech Systems MMV1600 - page 108

    LED Indicators ... .. ... ... .. ... ... .. ... ... .. ... ... ... . 3-2 Limited Warranty . .. ... .. ... .. .. ... .. .. ... .. 1-2, 8-1 Line Interface . ... .. ... ... .. ... ... .. ... ... .. ... ... .. . 1-18 Link Protocol . .. ... .. ... .. ... .. ... .. ... .. ... . 1-3, 1-18 Link Speed .. ... .. ... ... .. ... ... .. ... .. ... ... .. ... .. ...

  • Multi-Tech Systems MMV1600 - page 109

    Parity ... ... .... ... ... ... .... ... ... ... .... ... ... ... .... .. 1-17 Parity Select Command (P0-P2) . ... ... ... 5-13 Parts of your Mux Network ... .... ... .... .... ... 7-3 Pass EIA Signal Commands (F7-F8) ... 5-11 Pass Xon/Xoff Command (F9-F10) ..... . 5-11 PBX .. ... ... ... .... ... ... ... ... .... ... ... ... ... .... 1-6, 1-8 PBX ...

  • Multi-Tech Systems MMV1600 - page 110

    Source Node Command (SN) ... ... ... .. ... 5-13 Specifications . ... .. ... ... ... .. ... ... ... .. ... ... ... . 1-17 Stat Muxes .. ... ... .... ... .... ... .... ... .... ... .... ... .. 1-3 Statistical Multiplexers ... ... ... .. ... ... ... ... .. .. 1-3 Status Report Baud Rate (#RB) . .. ... ... .. 5-18 Status Report Time (#RT) .... ... ... ...

  • Multi-Tech Systems MMV1600 - page 111

    VOICE/FAX CHANNEL 2 FXO Connector .............................................................. 3-7 VOICE/FAX CHANNEL 2 FXS Connector .............................................................. 3-7 Voice/Fax Channel Parameters .. .. ... ... . 2-10 Voice/Fax Channels ... .. ... ... ... .. ... ... . 1-1, 1-8 Voice/Fax Channel Testing . .. ... ... ...

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