CHAPTER5 Cabling the Device
Mediant 800 Gateway & E-SBC | Hardware Installation Manual
➢ To connect the FXO interfaces:
1. Connect one end of an RJ-11 cable to the FXO port (labeled FXO).
Figure 5-7: Connecting FXO Interfaces
2. Connect the other end of the cable to the required telephone interface: (e.g., telephone
exchange analog lines or PBX extensions).
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 a 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 lifeline splitter cable is a separate orderable item.
● Analog Lifeline cabling is applicable only if the device is ordered with FXS
interfaces.
● The number of supported Lifelines depends on the device’s hardware configuration.
For the combined FXS/FXO configuration, one Lifeline is available; for the 12-FXS
configuration, up to three Lifelines are available.
Cable specifications:
■ Cable: Splitter cable with RJ-11 connector on one end and two RJ-11 jacks (plugs) on the other
end
■ Connector Type: RJ-11
■ Connector Pinouts:
Figure 5-8: RJ-11 Connector Pinouts for FXS Lifeline
➢ To cable the FXS Lifeline:
1. Connect the lifeline splitter to FXS Port 1.
2. On the lifeline splitter cable, do the following:
a. Connect the analog telephone to Port A.
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