3Com VCX v7111 User Manual page 36

Connecting the V7111 1x PORT RS-232 Port to Your PC
Using a standard RS-232 straight cable (not a cross-over cable) with DB-9 connectors,
connect the V7111 1x PORT RS-232 port (using a DB-9 to PS/2 adaptor) to either COM1 or
COM2 RS-232 communication port on your PC. The pinouts of the PS/2 connector is shown
in Figure 11.
A PS/2 to DB-9 adaptor is not included with the V7111 1x PORT package. For the PS/2 to
DB-9 pinouts, see Figure
For information on establishing a serial communications link with the V7111 1x PORT, see
Establishing a Serial Communications Link with the
PS/2 Connector Pinouts
Figure 11
PS/2 Female Connector and Pinout
2 (TD)
3 (GND) - Ground for Voltage
(RD) - Receive Data
6
PS/2 to DB-9 Adaptor Pinouts
Figure 12
Cabling the V7111 1x PORT/FXS Lifeline
The Lifeline provides a wired analog POTS phone connection to any PSTN or PBX FXS port
when there is no power, or when the network connection fails. Users can therefore use the
Lifeline phone even when the V7111 1x PORT is not powered on or not connected to the
network.
On FXS gateways, a single Lifeline, connected to port #1 using a splitter (not supplied), is
available. On combined FXS/FXO gateways a splitter is not required; all FXS ports are
automatically connected to FXO ports (FXS port 0 to FXO port 4 and so forth). A Lifeline is
not available on FXO gateways.
The Lifelines splitter connects pins #1 and #4 to another source of an FXS port, and pins #2
and #3 to the POTS phone. See the Lifeline splitter pinouts in
Lifeline Splitter Pinouts and RJ-11 Connector
Figure 13
1 2 3 4
36
12.
- Transmit Data
Lifeline Tip
1 -
2 - Tip
3 -
Ring
Lifeline Ring
4 -
V7111.
Figure 13.
®
3Com VCX V7111 VoIP Gateway User Guide