BayTech Telplex TX102, Telplex TX104, Telplex TX108 Owner's Manual
OWNER'S MANUAL
TELPLEX MODELS TX102,
TX104 AND TX108
STATISTICAL MULTIPLEXERS
Revision 1.04 and 3.03
BayTech Publication #U140E069-05
Thank you for selecting a Telplex statistical multiplexer.
The data provided in this Owner's Manual explains the various ways you
can operate your Telplex and configure it to your own computer system.
We suggest that you read this manual carefully before attempting to
install the Telplex and that you place special emphasis on correct cabling
and configuration. If you have any problems with your installation, please
contact a BayTech applications engineer for assistance at 1-800-523-
2702.
BayTech also manufactures data communications devices that provide
port sharing and expansion, port contention, buffered or non -buffered
printer sharing, network print servers, and data acquisition multiplexing.
If you would like information on any of these models, please contact
BayTech customer service.
We welcome any comments you may have about our products. And we
hope that you will continue to look to BayTech for your data
communications needs.
NOTE: The information contained in this document is subject to
change without notice.
Copyright 1994 by Bay Technical Associates, Inc.
Telplex, LaserShare, Print Master and TRAN-X are registered
trademarks of Bay Technical Associates, Inc.
IBM, IBM PC, IBM PC/AT, IBM PC/XT are products and registered
trademarks of International Business Machines Corporation.
Hewlett-Packard LaserJet is a product and registered trademark of the
Hewlett-Packard Company.
All products or company names are trademarks of their respective
holders.
TABLE OF CONTENTS
1 GENERAL INFORMATION ................................................................................................... 1
2 SPECIFICATIONS.............................................................................................................. 5
3 INSTALLATION .................................................................................................................. 9
3.1 UNPACKING ..................................................................................................... 9
3.2 SOFTWARE UTILITY DISKETTE .......................................................................... 9
3.3 POWER ........................................................................................................... 10
3.4 FACTORY DEFAULT CONFIGURATION .............................................................. 11
3.5 COMPOSITE PORT CABLING............................................................................. 12
3.5.1 MODEM CONNECTION ...................................................................... 12
3.5.1.1 TX104/TX108 MODEM CONNECTION ................................... 12
3.5.1.2 TX102 MODEM CONNECTION ............................................ 14
3.5.2 CABLE CONNECTION ....................................................................... 15
3.5.2.1 TX104/TX108 CABLE CONNECTION .................................... 15
3.5.2.2 TX102 CABLE CONNECTION .............................................. 16
3.6 TERMINAL PORT CABLING................................................................................ 17
3.6.1 TX104/TX108 TERMINAL PORT CONNECTION ...................................... 17
3.6.2 TX102 TERMINAL PORT CONNECTION ............................................... 19
4 OPERATION ..................................................................................................................... 20
4.1 TERMINAL PORT OPERATION ........................................................................... 20
4.1.1 GENERAL ........................................................................................ 20
4.1.2 USER-PROGRAMMABLE OPERATIONS............................................... 20
4.1.2.1 SERIAL PORT CONFIGURATION ....................................... 20
4.1.2.2 DATA BLOCK SIZE............................................................ 21
4.1.2.3 LOCAL ACCESS ............................................................... 21
4.1.2.4 STATUS MESSAGES.......................................................... 21
4.1.2.5 SERIAL PORT DESTINATION ............................................. 23
4.1.2.6 UNIT NUMBER ................................................................. 23
4.2 COMPOSITE OPERATION .................................................................................. 24
4.2.1 GENERAL ........................................................................................ 24
4.2.2 USER-PROGRAMMABLE OPERATIONS............................................... 24
4.2.2.1 BAUD RATE ..................................................................... 24
4.2.2.2 LINE TYPE ....................................................................... 24
4.2.2.3 PROGRAMMABLE STRINGS............................................... 25
4.3 OPERATING MODES ......................................................................................... 26
4.3.1 SYSTEM/LOCAL MODE...................................................................... 26
4.3.2 LOCAL UNIT AND REMOTE UNIT CONFIGURATION MODE.................. 28
4.3.3 MUX MODE....................................................................................... 29
4.3.4 DIAGNOSTICS MODE........................................................................ 30
4.3.4.1 DIAGNOSTICS MODE FOR MULTI-DROP UNITS.................. 30
4.3.4.2 DIAGNOSTICS MODE FOR STANDARD UNITS.................... 33
4.3.5 ACCESS MODEM COMMAND MODE................................................... 35
4.3.6 OPERATION MODE AT POWER-UP .................................................... 35
4.4 LED INDICATORS............................................................................................. 36
4.4.1 MULTI-DROP UNITS - LED DESCRIPTION .......................................... 36
4.4.2 STANDARD UNITS - LED DESCRIPTION ............................................ 37
4.5 SELECT SWITCH .............................................................................................. 38
4.6 DATA FLOW CONTROL ..................................................................................... 39
4.6.1 HARDWARE HANDSHAKING............................................................. 40
4.6.1.1 CTS OUTPUT FLOW CONTROL.......................................... 40
4.6.1.2 DTR INPUT FLOW CONTROL ............................................ 40
4.6.1.3 RTS/DSR PASS THROUGH ................................................ 41
4.6.2 XON/XOFF FLOW CONTROL.............................................................. 41
4.6.2.1 XON/XOFF OUTPUT FLOW CONTROL RECEIVE DATA
DIRECTION (RECV) .......................................................... 41
4.6.2.2 XON/XOFF INPUT FLOW CONTROL TRANSMIT DATA
DIRECTION (XMIT) ............................................................ 42
5 CONFIGURATION PROCEDURE........................................................................................ 42
5.1 MAIN CONFIGURATION MENU .......................................................................... 44
5.1.1 MULTI-DROP UNIT MAIN CONFIGURATION MENU.............................. 44
5.1.2 STANDARD UNIT MAIN CONFIGURATION MENU................................ 45
5.2 STATUS........................................................................................................... 46
5.3 SERIAL PORT CONFIGURATION ....................................................................... 47
5.4 BLOCK SIZE, PORT LOCAL ACCESS AND STATUS MESSAGES............................ 51
5.5 PROGRAMMABLE STRINGS............................................................................... 54
5.6 SET SERIAL PORT DESTINATION ...................................................................... 57
5.7 SET THIS UNIT NUMBER ................................................................................... 58
5.8 COMPOSITE PORT CONFIGURATION ................................................................ 59
5.9 EXIT................................................................................................................. 61
6 APPLICATION EXAMPLES ................................................................................................. 61
6.1 "POINT-TO-POINT" APPLICATION ....................................................................... 61
6.2 "STAR" APPLICATION ........................................................................................ 63
7 MAINTENANCE................................................................................................................. 65
7.1 RETURNS TO THE FACTORY ............................................................................ 65
7.2 REPACKING FOR SHIPPING............................................................................. 65
8 TECHNICAL SUPPORT...................................................................................................... 66
9 FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFACE STATEMENT. 67
APPENDIX A
RECOMMENDED CABLING................................................................................................................ 68
A.1 BETWEEN TX104 OR TX108 AND IBM PC, PC/XT OR PS/2
(DB-25) ............................................................................................................ 68
A.2 BETWEEN TX104 OR TX108 AND IBM PC/AT (DE-9).............................................. 69
A.3 BETWEEN TX104 OR TX108 AND HP LASERJET .................................................. 71
A.4 TX102 MODULAR CABLING................................................................................ 72
A.4.1 COMPUTER INTERFACE................................................................... 72
A.4.2 PRINTER/PLOTTER INTERFACE........................................................ 73
A.4.3 MODEM INTERFACE......................................................................... 73
A.4.4 TELPLEX INTERFACE........................................................................ 74
A.4.5 RJ-45 CABLE PINOUT....................................................................... 74
APPENDIX B
TELPLEX TX104/TX108 UNIT ASSEMBLY LAYOUT (FRONT AND REAR PANELS)..................................... 75
APPENDIX C
INDEX.............................................................................................................................................. 76
1
11 GENERAL INFORMATIONGENERAL INFORMATION
VERY IMPORTANT!!! Determine what type of TX102, TX104, or
TX108 you have purchased. There are two different types of Telplex:
multi-drop (Rev. 3.03) and standard (Rev. 1.04). Multi-drop units are
identified by a TYPE A sticker on the rear panel. Standard units do not
have a TYPE A sticker. Certain parts of this manual will pertain only to a
multi-drop unit and not the standard unit or vice versa. You will be
instructed to disregard certain parts of this manual if the corresponding
information is not relevant to a specific type of Telplex.
The Telplex TX102, TX104 and TX108 statistical multiplexer (stat mux)
units are used to link EIA-232 serial devices (e.g., computers, terminals
and printers) located at multiple sites together over single telephone
lines or cables. Such devices are connected to terminal ports on the
Telplex. A local TX102, TX104, or TX108 is connected to a remote
Telplex via a composite port.
The remote Telplex may be a TX102, TX104, TX108, TX4, TX28, or
TX60 for multi-drop units. The TX28 and TX60 are expandable units that
may have up to twenty-eight and sixty terminal ports respectively. The
TX28 and TX60 may have multiple composite ports installed to allow
connections to multiple sites. A standard TX102, TX104, or TX108 will
connect to an identical unit at the remote site.
The TX102, TX104, or TX108 will multiplex two, four, or eight lines of
data respectively. The multiplexed data is sent sequentially over a single
telephone line or cable via the local unit's composite port. The data is
automatically demultiplexed by a remote Telplex with distribution of data
to designated terminal ports.
2
A Telplex pair may be used in a "point-to-point" application where up to
two, four, or eight separate lines of data may be multiplexed and
demultiplexed simultaneously between two sites as shown in Figure 1.
The Telplex TX104 and
TX108 multiplex four or
eight individual
communications lines
into a single composite
channel. These
statistical multiplexers
can be used with
existing modems, short
haul modems, or hardwired back-to-back to
suit your specific
requirements
Figure 1: "Point-to-Point" Application: "Point-to-Point" Application
In this example, Port 1 of Unit 1 communicates with Port 1 of Unit 2, Port
2 of Unit 1 communicates with Port 2 of Unit 2 and so on.
NOTE: Standard units will support point-to-point applications only.
A multi-drop application involving multiple composite ports will connect
several units to a TX60 or TX28 in a "star" configuration. See Figure 2
on the following page.
3
Figure 2: "Multi-drop" Application: "Multi-drop" Application
Individual Telplex models are self-contained devices which can be
desk-top or rack mounted. The baud rate, word size, stop bits, parity,
XON/XOFF handshaking and RTS/DSR pass through for all terminal
ports are programmable. Other programmable features for the terminal
ports include Block Size, Local Access, and Status Messages. Serial
Port Destination and Unit Number are programmable for multi-drop
units. Programmable features for the composite port include the baud
rate, Line Type, and Programmable Strings. All changes are saved in
non-volatile memory to become the new power-up default.
Multi-drop units operate in one of seven modes: System mode, MUX
mode, Local Unit Configuration mode, Remote Unit Configuration
mode, Local Diagnostics mode, Remote Diagnostics mode, or
Access Local Modem mode. Standard units operate in one of four
modes: Local mode, MUX mode, Local Unit Configuration mode, or
Remote Unit Configuration mode.
4
System mode (multi-drop units) and Local mode (standard units) allow
a local terminal to instruct the Telplex to enter into any of the other modes
of operation. Either type of unit communicates in MUX mode when a
successful connection has been made with a remote Telplex. While in
MUX mode, terminal ports on the local Telplex communicate with
designated terminal ports on a remote Telplex.
Local Unit Configuration mode allows a local terminal to program the
various features on the local Telplex. Remote Unit Configuration
mode allows this same terminal to program these features on a remote
Telplex model when a communication link is established with the remote
site.
In Local Diagnostics mode, a terminal connected to a multi-drop unit
may instruct the local Telplex to perform a self-test on all ports. The
terminal may also communicate in full duplex or loopback
communication with a selected port on the local unit. Remote
Diagnostics mode allows a terminal connected to a multi-drop unit or a
standard unit to perform self-test, full duplex, or loopback Diagnostics
with ports on a remote Telplex if there is a communication link. Standard
units allow remote unit diagnostics from Remote Unit Configuration
mode.
Access Local Modem mode allows a terminal connected to a multidrop unit to communicate directly with the composite port and issue
commands to the local modem. This device may also instruct the
Telplex to send two separate user-programmable strings to the local
modem. A terminal connected to a standard unit may perform modem
communication from Local mode.
5
22 SPECIFICATIONSSPECIFICATIONS
INTERFACE: Terminal Ports and Composite Port (Modem
Connection): EIA-232 (CCITT V.24) -12V mark, +12V
space.
Composite Port (Direct Connection)*: EIA-422.
TRANSMISSION: Asynchronous.
CONNECTORS: TX104/TX108 Terminal Ports:
DB-25 female, DCE type;
Composite Port: DB-25 male, DTE type.
TX102 (all ports): RJ-45.
HANDSHAKING: Terminal Ports: Input - DTR, RTS;
Output - CTS, DSR. Selectable XON/XOFF;
Composite Port: Input - CTS, Output - internal protocol.
INTERNAL BUFFER: Receive - 256 character; Transmit -
7.5K per port.
POWER: TX104 and TX108: 115 VAC, 50/60 Hz., 0.2A;
Optional 230 VAC, 50/60 Hz, 0.1A.
TX102: +8 VDC, 200 mA external power required
(supplied with unit).
ENVIRONMENT: 0 degrees to 50 degrees C temperature;
5% to 95% humidity.
DIMENSIONS: TX104 and TX108 - 10.125w x 6.5d x 2.25h
inches; TX102 - 4.17w x 4.705d x 1.5h inches.
WEIGHT: 4 lbs..
* - The composite port of the TX102 uses EIA-232 serial interface
for Direct Connection.
6
LEDs: Power LED; MODE LEDs indicate the mode of
operation the Telplex is operating in, LOCAL and MUX
LEDs are also used to indicate the status of a selected
terminal port's DCD and DTR EIA-232 lines respectively
while the Telplex is in Local Unit Configuration mode.
Remaining LEDs indicate composite port's status in
System mode or MUX mode as follows: Transmit (TX),
Receive (RX), Data Set Ready (DSR), Clear To Send
(CTS) and Data Carrier Detect (DCD). In Local Unit
Configuration mode, these LEDs indicate the status of a
selected terminal port's EIA-232 lines as follows: Transmit
(TX), Receive (RX), Ready to Send (RTS), Clear to Send
(CTS), and Data Set Ready (DSR).
SELECT SWITCH: Using Modem Line Type: Used to stop
the multiplexing of characters while the Telplex is in MUX
mode and return the Telplex to System mode when Local
Access is disabled for all terminal ports; also used to send
Programmable String 1 out the composite port.
Using Direct Line Type: Used to stop the multiplexing of
characters while the Telplex is in MUX mode and return the
Telplex to System mode when Local Access is disabled
for all terminal ports.
Also used to temporarily set Port 1's serial configuration
and Local Access to factory default values (fail-safe factory
default access operation).
MOUNTING: Desk-top; rack-mount optional.
WARRANTY: One full year.
7
FACTORY POWER-UP DEFAULT CONFIGURATIONS:
Terminal Ports:
Baud rate: 9600.
Word size: 8 bits.
Parity: None.
Stop bits: 1.
XON/XOFF (TX) : Off.
XON/OFF (RX) : Off.
RTS/DSR Pass Through: Disabled.
Block Size: 32 characters.
Local Access: Enabled on Port 1 only.
Status Messages: Enabled on Port 1 only.
Serial Port Destination (multi-drop units only):
Port 1: Unit 1, Module 1, Port 1
Port 2: Unit 1, Module 1, Port 2
Port 3: Unit 1, Module 1, Port 3
Port 4: Unit 1, Module 1, Port 4
Port 5: Unit 1, Module 1, Port 5
Port 6: Unit 1, Module 1, Port 6
Port 7: Unit 1, Module 1, Port 7
Port 8: Unit 1, Module 1, Port 8
Unit Number (multi-drop units only): 1
Composite Port:
Baud Rate: 9600.
Word Size : 8 bits.
Stop bits: 1.
Line Type: Direct.
* String 1: <NULL>; Sent manually.
* String 2: <NULL>; Sent manually.
* - Applicable only if Line Type is programmed to be
Modem.
8
USER-PROGRAMMABLE CONFIGURATIONS:
Programmed in Local or Remote Unit Configuration mode
(except the composite port). Changes are saved in non-volatile
memory to become the power-up default configuration.
Terminal Ports:
Baud rate: 50, 75, 110, 135, 150, 300, 600, 1200,
2400, 4800, 9600, or 19200.
Word size : 5, 6, 7 or 8 bits.
Stop bits: 1, 1 1/2, or 2.
Parity: Even, odd or none.
XON/XOFF (TX) : On or off.
XON/XOFF (RX) : On or off.
RTS/DSR Pass Through: Enabled or disabled.
Block Size : 1 to 255 characters.
Local Access: Enabled or disabled.
Status Messages: Enabled or disabled .
Serial Port Destination (multi-drop units only):
Individual ports may be assigned to communicate
with Unit 1-32, Module 1-16 and Port 1-8.
Unit Number (multi-drop units only): 1 to 32.
Composite Port: (changed in Local Unit Configuration
mode only)
Baud rate: 50, 75, 110, 135, 150, 300, 600, 1200,
2400, 4800, 9600, 19.2K, 38.4K, 57.6K, or 115.2K
bps.
Line Type: Modem or Direct.
* String 1: Up to 42 characters; may be sent on the
following conditions: Power-up, loss of DCD,
manually, or by pressing the SELECT switch for
more than three seconds.
* String 2: Up to 42 characters; may be sent on the
following conditions: Power-up, loss of DCD, or
manually.
* - Applicable only when using Modem Line Type.
9
33 INSTALLATIONINSTALLATION
This section discusses basic installation instructions pertaining to
unpacking your Telplex, obtaining the software from the supplied
diskette, power considerations, factory default parameters and
composite/terminal port cabling. Operation is described in Section 4,
Section 5 discusses configuration and Section 6 provides specific
configuration examples.
3.13.1 PACKINGPACKING
After opening the box, check the packing list that comes with your
Telplex to ensure that you have received all components. At a minimum
you should have received the unit, this manual and any applicable
addendums, and a software utility diskette. The TX102 will be provided
with an external power supply. Check the unit to make certain it did not
incur damage during shipping. If items are missing or damaged, contact
BayTech technical support at 800-523-2702.
3.23.2 SOFTWARE UTILITY DISKETTESOFTWARE UTILITY DISKETTE
BayTech provides utility software for DOS compatible PCs to assist you
in configuring the Telplex.
IMPORTANT: Copy the BayTech original diskette onto a blank diskette
and store the original in a safe place.
The diskette contains the following programs: REMCONFG.COD,
SMODE.EXE, TERM.EXE and README.RDM. The Telplex does not
utilize the REMCONFG.COD file. TERM.EXE is a terminal emulation
program used to configure the various features of the unit. SMODE.EXE
is a program used to configure COM ports of DOS compatible machines
to operate at speeds faster than 9600 bps (up to 115,200 bps).
10
Please review the README.RDM file to obtain instructions for
TERM.EXE and SMODE.EXE. To view the README.RDM file on your
screen, first insert the diskette into your PC's disk drive and then enter
the command TYPE README.RDM from your disk drive prompt. To
print this file, enter the command
COPY README.RDM LPT1: from your disk drive prompt.
3.33.3 POWERPOWER
The TX104 and TX108 require 115 VAC, 50/60 Hz power and come
with a three-prong power cord. Do not attempt to operate the unit with a
two-prong socket or adapter. 230 VAC, 50/60 Hz is optional.
The TX102 requires external DC power. Plug the DC jack of the external
power supply into the 9VDC receptacle on the back of the unit. Plug the
AC connector into an AC outlet.
All Telplex models power up when you press the power switch to "ON".
A green LED on the front panel will illuminate when power is applied.
CAUTION: Do not attempt to make any internal changes. Any upgrades
to the main board EPROM must be performed by an authorized service
technician or by BayTech. Please contact BayTech at 1-800-523-2702
for more information.
11
3.43.4 FACTORY DEFAULT CONFIGURATIONFACTORY DEFAULT CONFIGURATION
From the factory, the Telplex terminal ports come with the following
power-up default configuration:
Baud rate: 9600,
Word size : 8 bits,
Stop bits: 1 bit,
Parity: None,
XON/XOFF TX and RX: Disabled.
RTS/DSR pass through: Disabled.
Block Size : 32 characters.
Local Access: Enabled for Port 1 only.
Status Messages: Enabled for Port 1 only.
Serial Port Destination (multi-drop units only):
Port 1: Unit 1, Module 1, Port 1
Port 2: Unit 1, Module 1, Port 2
Port 3: Unit 1, Module 1, Port 3
Port 4: Unit 1, Module 1, Port 4
Port 5: Unit 1, Module 1, Port 5
Port 6: Unit 1, Module 1, Port 6
Port 7: Unit 1, Module 1, Port 7
Port 8: Unit 1, Module 1, Port 8
Unit Number (multi-drop units only): 1
From the factory, the Telplex composite port comes with the following
power-up configuration:
Baud rate: 9600.
Word size : 8 bits.
Stop bits: 1.
Line Type: Direct.
* String 1: Null; sent manually.
* String 2: Null; sent manually.
* - Applicable only if Line Type is Modem..
If your application does not match this factory setup, you must
reconfigure your Telplex as described in Section 5.
12
3.53.5 COMPOSITE PORT CABLINGCOMPOSITE PORT CABLING
The composite ports of multiple Telplex units are connected together via
external modems (Section 3.5.1) or cable (Section 3.5.2).
3.5.13.5.1 MODEM CONNECTIONMODEM CONNECTION
See Section 3.5.1.1 if connecting a modem to a TX104 or TX108 or
Section 3.5.1.2 if connecting a modem to a TX102.
3.5.1.13.5.1.1 TX104/TX108 MODEM CONNECTIONTX104/TX108 MODEM CONNECTION
If an external modem will be used to connect a local TX104 or TX108 to
a remote Telplex, the modem should be connected to the COMPOSITE
EIA-232 port on the back panel of the unit (see Appendix B). The
TX104 or TX108 should be programmed to operate with a Line Type of
Modem (see Section 5.8).
The standard configuration of the COMPOSITE EIA-232 port is DTE
(Data Terminal Equipment) with a DB-25 male connector which uses the
following signals for communication:
TX104 AND TX108 EIA-232 COMPOSITE PORT PIN/SIGNAL DEFINITION
Pin Signal
(EIA-232)
Direction Description
1 PGND --- Protective Ground
2 TX Output Data Out
3 RX Input Data In
4 RTS Output +12 volts when Telplex is powered up
5 CTS Input Transmit enabled when +12 volts. Enabled if no
connection.
7 SGND --- Signal Ground
8 DCD Input Data Carrier Detect. Controlled by modem.
20 DTR Output +12 Volts
13
The EIA-232 port of an external modem is DCE (Data Communication
Equipment) with a DB-25 female connector. Please see Section 3.6 for
a pin definition of a DCE device.
Use the pinout shown in Figure 3 to connect an external modem to the
TX104 or TX108 COMPOSITE EIA-232 port.
TX104 or TX108 MODEM
FEMALE DB-25 MALE DB-25
You may issue commands to the external modem from selected terminal
devices when the Telplex is in Access Local Modem mode. Please see
the technical documentation for your modem to determine which
commands are supported.
WARNING: XON/XOFF flow control must be disabled on the modems.
Failure to do so will result in erroneous characters appearing in addition
to the data being sent.
1
2
3
4
5
6
7
8
20
1
2
3
4
5
6
7
8
20
PGND
TXD
RXD
RTS
CTS
DSR
SGND
DCD
DTR
<
<
<
>
>
>
>
DTR
DCD
SGND
DSR
CTS
RTS
RXD
TXD
PGND
Figure 3Figure 3: Straight DB-25 Cable
14
3.5.1.23.5.1.2 TX102 MODEM CONNECTIONTX102 MODEM CONNECTION
The modem should be connected to the COMPOSITE EIA-232 port on the
back panel of the TX102 and the unit programmed to operate with a Line
Type of Modem (see Section 5.8). The TX102 composite port has an RJ-45
modular connector. Most modems do not have RJ-45 modular connectors.
Therefore, adapters are required to convert the modem's DB-25 connector to
a module connector. BayTech has a complete line of RJ-45 adapters that
will make your installation quick and trouble free. See Appendix A.4 for the
recommended adapter/cable pinouts. Figure 4 and Figure 5 are drawings of
an RJ-45 receptacle and plug. The pin assignments are given.
Figure 4. RJ-45 Receptacle Figure 5. RJ-45 Plug
The TX102's composite port uses the following signals:
TX102 EIA-232 COMPOSITE PORT RJ-45 PIN/SIGNAL DEFINITION
Pin SignalDirection Description
1 DTR Output Data Terminal Ready. +12 volts when power is applied to
Telplex.
2 GND ---- Signal Ground
3 RTS Output Request To Send. +12 volts when power is applied to Telplex.
4 TX Output Transmit Data
5 RX Input Receive Data
6 DCD Input Data Carrier Detect. Controlled by external modem.
7 GND ---- Signal Ground
8 CTS Input Clear To Send. Telplex transmit enabled when +12V. Internally
enabled if no connection.
15
3.5.23.5.2 CABLE CONNECTIONCABLE CONNECTION
See Section 3.5.2.1 if connecting a TX104 or TX108 to a remote Telplex
via cable or Section 3.5.2.2 if connecting a TX102.
3.5.2.13.5.2.1 TX104/TX108 CABLE CONNECTIONTX104/TX108 CABLE CONNECTION
If you wish to connect the composite port of a local TX104 or TX108 to a
remote Telplex via cable, use the COMPOSITE EIA-422 port on the
back panel of the TX104 or TX108 (see Appendix B). You must
program the unit to use a Line Type of direct (see Section 5.8). The pin
definition for the EIA-422 port is shown in the following table:
TELPLEX EIA-422 COMPOSITE PORT PIN/SIGNAL DEFINITION
Pin SignalDirection Definition
1 PGND --- Protective Ground
2 RX+ Input Receive Data (+)
3 TX+ Output Transmit Data (-)
5 CTS Input Transmit Enable
7 SGND --- Signal Ground
11 --- --- Termination resistor strapping point
14 RX- Input Receive Data (-)
16 TX- Output Transmit Data (-)
20 DTR Output +12 volts when Telplex is powered on
Use a cable with the pinout and connector types shown in Figure 6 on
the following page to connect the EIA-422 ports of two Telplex units
together:
16
TX104/TX108 EIA-422 TX104/TX108 EIA-422
DB-25 FEMALE DB-25 FEMALE
NOTE: The EIA-422 port will give you the capability of using a cable up
to 4000 feet between two Telplex units.
3.5.2.23.5.2.2 TX102 CABLE CONNECTIONTX102 CABLE CONNECTION
If you wish to connect the composite port of a local TX102 to a remote
Telplex via cable, use the COMPOSITE EIA-232 port on the back panel
of the TX102. You must program the unit to use a Line Type of Direct
(see Section 5.8). See Section 3.5.1.2 for the pin/signal definition of the
composite port.
IMPORTANT: When connecting a TX102 to a remote Telplex via cable,
you must use the EIA-232 composite port on the remote unit. This port is
usually connected to an external modem. Do not use the EIA-422 port
on the remote unit.
Some remote Telplex models will require an RJ-45 adapter to convert
the EIA-232 composite port's DB-25 connector to an RJ-45 connector.
The following Telplex models require an adapter to connect to the TX102
via cable: TX104, TX108, and TX24-V41B module. The adapter
required for these models is 25FRJ45PC-1. The pinout for this adapter
and the required cable are shown in Appendix A.4.4.
RX+
TX+
TX-
SGND
CTS
16
7
5
3
2
1 PGND
14 RX-
DTR
20 20
14
1
2
3
5
7
16
DTR
RX-
PGND
CTS
SGND
TX-
TX+
RX+
Figure 6
17
WARNING: Do not use a cable longer than 150 feet to connect the
TX102 to a remote Telplex.
3.63.6 TERMINAL PORT CABLINGTERMINAL PORT CABLING
If connecting a terminal device to a TX104 or TX108, refer to Section
3.6.1. Refer to Section 3.6.2 if connecting to a TX102.
3.6.13.6.1 TX104/TX108 TERMINAL PORTTX104/TX108 TERMINAL PORT
CONNECTIONCONNECTION
IMPORTANT: Before you proceed with cabling, you must know whether
the terminal devices that you will connect to your Telplex are DTE (Data
Terminal Equipment) or DCE (Data Communication Equipment). The
following devices are generally DTE: terminals, printers, and computers
like the IBM PC. The following devices are DCE: modems and some
computers.
The standard configuration of the TX104 and TX108 is all terminal ports
DCE with DB-25 female connectors. DCE ports use the following
signals for communication:
TELPLEX EIA-232 TERMINAL PORT PIN/SIGNAL DEFINITION
Pin SignalDirection Definition
1 PGND --- Protective Ground
2 TX Output Data In
3 RX Input Data Out
4 RTS Input Request To Send. Input for RTS/DSR pass through feature
5 CTS Output Clear To Send. Handshake In, enable/disable the transmission
of characters
6 DSR Output Data Set Ready. If RTS/DSR pass through is enabled, this line
follows the state of the remote Telplex's RTS line. If RTS/DSR
pass through is disabled, this line is a constant +12 volts.
7 SGND --- Signal Ground
8 DCD Output Data Carrier Detect. Follows the state of the composite's DCD
line.
18
20 DTR Input Data Terminal Ready. Enable/disable the receiving of
characters.
19
If you are interfacing a DCE device to a DTE device, use a one-to-one
straight cable as shown in Figure 7. If you are interfacing a DCE device
to a DCE device, used a crossed cable as shown in Figure 8.
TELPLEX - DCE DTE DEVICE
MALE DB-25 MALE/FEMALE DB-25
TELPLEX - DCE DCE DEVICE
MALE DB-25 MALE DB-25
NOTE: Please refer to Appendix A for recommended cabling between
the TX104 or TX108 and various computers and printers.
1
2
3
4
5
6
7
8
20
1
2
3
4
5
6
7
8
20
PGND
TXD
RXD
RTS
CTS
DSR
SGND
DCD
DTR
<
<
<
>
>
>
>
DTR
DCD
SGND
DSR
CTS
RTS
RXD
TXD
PGND
Figure 7
>
<
<
>
<
PGND
TXD
RXD
RTS
CTS
DSR
SGND
DTRDTR
SGND
DSR
CTS
RTS
RXD
TXD
PGND
20
7
6
5
4
3
2
1
1
2
3
4
5
6
7
20
>
Figure 8
20
3.6.23.6.2 TX102 TERMINAL PORT CONNECTIONTX102 TERMINAL PORT CONNECTION
The terminal ports on the TX102 have RJ-45 module connectors. Most
serial computers, terminals, and printers do not have RJ-45 modular
connectors. Therefore, adapters are required to convert either DB-25 or
DE-9 connectors to modular connectors. BayTech has a complete line
of RJ-45 adapters and cables that will make your installation quick and
trouble free. The TX102's terminal port use the following signals for
communication:
TX102 TERMINAL PORT RJ-45 PIN DEFINITION
Pin SignalDirectio
n
Description
1 DTR Output Data Terminal Ready. -12 volts when Telplex buffer is full.
2 DCD Output Data Carrier Detect. Follows the composite port's DCD line.
3 RTS Output Request To Send. If RTS/DSR pass through is enabled, this line
follows the remote unit's DSR line. If RTS/DSR pass through is
disabled, this line is +12 Volts when the Telplex is powered on.
4 TX Output Transmit Data
5 RX Input Receive Data
6 DSR Input Data Set Ready. Input for RTS/DSR Pass through feature.
7 GND ---- Signal Ground
8 CTS Input Clear To Send. OK to transmit when +12 volts. Internally
enabled if no wire is connected.
Figure 4 and Figure 5 on page 13 show the RJ-45 receptacle and plug.
Please refer to Appendix A for the recommended adapter and cable
pinouts.
21
44 OPERATIONOPERATION
Section 4.1 discusses terminal port operation, Section 4.2 discusses
composite port operation, Section 4.3 discusses the different operating
modes, Sections 4.4 and 4.5 discusses the LEDs and SELECT switch
functions, and Section 4.6 discusses data flow control.
4.14.1 TERMINAL PORT OPERATIONTERMINAL PORT OPERATION
4.1.14.1.1 GENERALGENERAL
The TX102, TX104, and TX108 multiplex two, four, or eight lines of data
respectively. Multiplexed data is sent sequentially over a single
telephone communication line or cable. Data is then automatically
demultiplexed by a remote Telplex with distribution of data to designated
terminal ports. Individual terminal ports may be programmed to allow the
device connected to it access to System mode for multi-drop units or
Local mode for standard units.
NOTE: Standard units will only support a "point-to-point" application as
shown in Figure 1 on Page 2. Port 1 of the local unit will communicate
with Port 1 of the remote unit, Port 2 with Port 2, and so on. Multi-drop
units allow you to program the specific remote port a local terminal port
will communicate with once both units go into MUX mode.
4.1.2.34.1.2.3 USERUSER-PROGRAMMABLE-PROGRAMMABLE
OPERATIONSOPERATIONS
4.1.2.14.1.2.1 SERIAL PORT CONFIGURATIONSERIAL PORT CONFIGURATION
You may program the baud rate, word size, stop bits, parity, XON/XOFF
handshaking and RTS/DSR pass through for individual terminal ports.
Please see Section 2 for a list of available serial parameters. The
Telplex will translate for devices using different configurations. The
factory default Serial Port Configuration is 9600 baud, 8 bit word
size, 1 stop bit, no parity, XON/XOFF handshaking and RTS/DSR
pass through disabled for all ports.
22
4.1.2.24.1.2.2 DATA BLOCK SIZEDATA BLOCK SIZE
Multiplexed data from individual terminal ports is sent and received by
the composite port in blocks. The Block Size for individual terminal ports
may be programmed from 1 to 255 characters. If a terminal port
requires a higher priority, the port would have a larger Block Size than
the other terminal ports. For example, if a port on a main frame
computer system is primarily sending data to a remote terminal, the
main frame port could be programmed to have a higher data block size.
NOTE: It is recommended that the transmit Block Size for a particular
terminal port be no less than 10 characters due to resulting performance
degradation.
The default Block Size is 32 characters for all ports.
4.1.2.34.1.2.3 LOCAL ACCESSLOCAL ACCESS
The Telplex may be programmed to allow selected terminal devices to
enter into System mode. Entry into System mode allows selected users
to instruct the Telplex to enter into any of the other modes of operation
(see Section 4.3). The factory default Local Access is enabled for
Port 1 and disabled for all other ports.
4.1.2.44.1.2.4 STATUS MESSAGESSTATUS MESSAGES
Status messages are sent to selected terminal ports under various
conditions. These messages inform the terminal port(s) if the local
Telplex is waiting for a connection or has a connection with its
designated remote port. Another status message will prompt terminal
ports with Local Access enabled to send +++ to enter into System mode
or Local mode (see Section 4.3.1).
NOTE: Terminal ports with Status Messages disabled will not receive
any of the messages shown in the following illustrations.
23
A standard unit will send a message similar to the following for a TX104
when the Telplex is powered up and when MUX mode is terminated (see
Section 4.3.3):
TX104 in Local mode --- Type +++ to Access Local Mode
When a standard unit enters into MUX mode, the Telplex will send the
following message:
TX104 in MUX mode
A multi-drop unit will send the following message when the Telplex is
powered up and when returning to MUX mode from System mode (see
Section 4.3.1):
TELPLEX IN MUX MODE
Type +++ to Access System Menu
While a local terminal port on a multi-drop unit is waiting for a connection
to its designated remote terminal port, the following message will be
sent:
Waiting for Connection!
After a connection is made, the following message will be sent from a
multi-drop unit:
Connect To Unit X, Module Y, Port Z
where X is the designated unit number, Y is the designated module
number and Z is the designated port number (see Section 4.1.2.5).
If a multi-drop unit has a connection with its designated remote Telplex
and the connection is terminated, the Telplex will send the following
message:
Port Disconnected
Status messages will also be generated when a local terminal enters
into System/Local mode (see Section 4.3.1) or Diagnostics mode (see
Section 4.3.4).
The factory default has Status Messages enabled for Port 1 and
disabled for all other ports.
24
4.1.2.54.1.2.5 SERIAL PORT DESTINATIONSERIAL PORT DESTINATION
NOTE: This section does not apply to standard Telplex units.
Serial Port Destination is the remote Telplex terminal port a local
terminal port will connect to once a communication link is established.
The Serial Port Destination consists of the remote Telplex's Unit
Number, Module Number and Port Number. The Unit Number may
range from 1 to 32, the Module Number may range from 1 to 16 and the
Port Number may range from 1 to 8.
Factory default is Unit 1, Module 1, Port X, where X is the local unit
port number (1 to 8).
4.1.2.64.1.2.6 UNIT NUMBERUNIT NUMBER
NOTE: This section applies to multi-drop units only.
Unit Number is used to identify multiple Telplex units and to direct
terminal port data. Unit Number informs a local Telplex that data coming
in from a remote unit is to be routed to a local port. If a remote terminal
port is to communicate with a local terminal port, the remote terminal port
would have the local Unit Number as part of its Serial Port Destination.
The Telplex Unit Number may range from 1 to 32. Factory default is
Unit 1.
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