AudioCodes Mediant 800 MSBR - Connecting the FXS Analog Lifeline; Figure 5-26: RJ-11 Connector Pinouts for FXS Lifeline; Figure 5-27: Cabling FXS Lifeline - Mediant 800 B MSBR

Hardware Installation Manual 52 Document #: LTRT-10236
Mediant 800 MSBR
5.4.3 Connecting the FXS Analog Lifeline
The device supports Analog Lifeline. If the device loses power, for example, due to a power
outage or the unplugging of its power cable, it automatically routes calls from a POTS
telephone ("lifeline" phone), connected to an FXS port, to the PSTN (instead of the IP
network).
The Lifeline is provided by FXS Port # 1. This port connects to the analog POTS phone and
the PSTN / PBX using an RJ-11 splitter cable (not supplied). The Lifeline splitter connects
pins 1 and 4 to another source of an FXS port, and pins 2 and 3 to the POTS phone. The
RJ-11 connector pinouts are shown in the figure below.
Figure 5-26: RJ-11 Connector Pinouts for FXS Lifeline
 To cable the FXS Lifeline:
1. Connect the lifeline splitter cable to FXS Port 1.
2. On the lifeline splitter cable, do the following:
a. Connect the analog telephone to Port A.
b. Connect an analog PSTN line to Port B.
Figure 5-27: Cabling FXS Lifeline – Mediant 800B MSBR