Page 8-151
10/2008
AMT/PTD/TR/0020/2/7/EN
8.3
Synchronisation on M6501 L/R/RM IP PBX and Succession
6500 Media Gateway with OCT4/OCT4 I
8.3.1
Principle
In a network containing several PBXs fitted with an OCT4 or OCT4 I card (M6501 L/R/RM IP
PBX and Succession 6500 Media Gateway), it is not necessary to wire the DECT base stations
with a third pair for synchronisation. The OCT4/OCT4 I cards are connected by an ISDN cable
via a synchronisation port. This cable carries the multi-frame and bit clocks.
Figure 7-5: Multi-site synchronisation with OCT4/OCT4I
Each OCT4/OCT4 I card has two synchronisation ports (RJ45 connectors ): a secondary port, J6
(output) and a primary port, J3 (input).
The secondary port of the master or N slave is connected to the primary port of the first slave or
slave N+1.
The DECT clocks are transmitted from one PBX to another with a timeout depending on:
•
the length of the connection cable
•
the timeout set for the transmitters/receivers of each PBX.
OCT4 I
J3 J6
OCT4 I
J3 J6
OCT4 I
J3
J6
OCT4 I
J3 J6
Paster site
Slave site 1
Slave site 2
Slave site 3
Link 1
Link 2
Link 3
L1
L2
L3
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