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Chapter 3 - Front and Rear Panel Descriptions
3.3 Connectors
The cable connections for the DataTalker are made at the back panel. Refer to Chapter 5 for
cabling installation procedures. Refer to Appendix C for cabling diagrams. The DataTalker back
panel is shown in Figure 3-2.
MODEM
DSU/TA
DIAL-UP LEASED DIGITAL
VOICE/FAX CHANNEL 1
FXO FXS
EXTERNAL COMPOSITE
DATA/COMMAND
RS232C/V.35
E&M
INTERNAL COMPOSITE
POWER
GND
VOICE/FAX CHANNEL 2
Power Switch
Frame Ground
Figure 3-2. Back Panel (Desktop Version)
3.3.1 Frame Ground Connector (GND)
Use the GND connector to connect the DataTalker frame ground to the PBX’s frame ground
when the DataTalker is configured for E&M operation. (The frame ground connector for the rack
version is on back of the RackTalker rack.)
3.3.2 POWER Connector
The POWER connector shown in Figure 3-2 is the receptacle for the DC power module supplied
with the desktop DataTalker. The rack-mounted DataTalker has an AC power connector that
plugs into the power bus on a Multi-Tech RackTalker rack when the DataTalker is inserted.
3.3.3 DATA/COMMAND Connector
Use this female DB-25 connector to connect the DataTalker to a data channel device such as a
terminal, PC, or router, or to configure the DataTalker in command mode. The data channel
device can be synchronous or asynchronous. In command mode, an ASCII terminal or a PC with
a serial port can be used to configure the DataTalker. The connector’s function (data or
command) is determined by the position of DIP switch position 3.
3.3.4 EXTERNAL COMPOSITE RS232C/V.35 Connector
Use this male DB-25 connector to connect to an external modem, DSU, ISDN terminal adapter,
or any device that is synchronous, full duplex, and supplies clocking signals on pins 15 and 17.
The connection interface can be either RS232C or V.35, selected by moving an internal V.35
shunt.
3.3.5 VOICE/FAX CHANNEL 1 FXS Connector
Use the FXS (Foreign eXchange Station) connector to connect the DataTalker to an analog
station instrument (telephone, fax machine, or key telephone system). The FXS connector is an
RJ-11 jack. If a second voice/fax channel is installed, it has an identical connector.
3.3.6 VOICE/FAX CHANNEL 1 FXO Connector
Use the FXO (Foreign eXchange Office) connector to connect the DataTalker to a analog station
card on the local PBX (Private Branch eXchange). This connection is also commonly referred to
as an OPX (Off Premises eXtension). The FXO connector is an RJ-11 jack. If a second voice/fax
channel is installed, it has an identical connector.