Installation Manual

Chapter 4
Note:
The S0 Interface Module is also compatible with Alcatel Reflexes sets
Figure 4.60: Example of Configuration with an S0 Interface Module
The S0 module provides an S0 bus supplying power. An external power supply (230V AC/48V
DC adapter) is required.
There are two possible operating modes on the S0 bus:
- Non permanent layer: layer 1 must be set up by the calling end (PCX or terminal) at the
start of each call; layer 1 is shut down at the end of the call
- Permanent layer: operation of the S0 bus depends on the direction in which the initial call
was set up:
• If the call was set up from the PCX to the terminal, layer 1 is kept when the call ends.
• If the call was set up from the terminal to the PCX, layer 1 is shut down at the end of
the call. It must be set up again for the following call. If operation is incompatible with
the terminal used, there are two possible solutions: Either layer 2 is kept, this prevents
layer 1 being shut down, or, layer 1 is set up from the PCX by making a call to the
terminal. The call does not need to get through.
4.9.1.2 Compliant Standards
4.9.1.2.1 Safety Requirements
4.9.1.2.2 ECM
- EN60950: European requirements
- UL 1950: US requirements
- CAN/CSA-C22.2 No 950-95: Canada
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