Installation manual

PS10270JENAA01 20/10/2004 81
Installing an external mains unit
A mains unit can be added to the M520 and M640 sets to relieve the PBX from excessive
consumption (more than 10 LEDs in frequent use).
Note: This mains unit should be supplied from a single-phase, 230 V AC network, excluding IT
diagram units defined in standard NF EN 60.950.
If the M520 or M640 sets are expanded using an M600 module, the mains unit is connected to
the M600.
In all cases, the mains unit is connected via an RJ 45 (8-pin) connector.
Installing an M600 expansion module
The M600 expansion module provides an additional 20 programmable keys with associated
LEDs to the M520 and M640 telephone sets. Connect the module as shown in the figure below:
Installing an IP cartridge on M760 and M780 sets
M760 and M780 sets can be converted into i760 and i780 IP sets by the addition of an IP
cartridge which enables the sets to be connected to a LAN. There are IP cartridge versions: one
for the M760, and one for the M780.
The procedure for installing a cartridge is given in the M7xx digital set and i7xx IP set Installation
Manual- ref. PS9286BAA01.