Wiring Of Synchronisation Ports - Aastra X series Installation And Implementation Manual

This delay can be made up for through MMC (see Chapter - Programmation multi-sites, § 11.4).
Adjustment is made in 100 m steps on the slave PBXs, with the following formula applied:
8xN + totalL
where N = number of slave PBXs from master PBX
and totalL = total length of cable between master and slave PBX
Example figure above:
• L1 = 50m, L2 = 200m, L3 = 27 m
• Compensation for slave site 1:
8x1 + 50 = 58 m => compensation < 100m
• Compensation for slave site 2:
8x2 + 50 + 200 = 266 m => compensation < 300m
• Compensation for slave site 3:
8x3 + 50 + 200 + 27 = 301 m => compensation < 400m
Note: The maximum cumulative length of the cable must not exceed 1952 m.
The cumulative length of the cable between a slave N and slave N+2 must not exceed
600 m.
8.3.2

Wiring of synchronisation ports

ISDN straight wiring:
AMT/PTD/TR/0020/2/7/EN
Signal
1st pair
2.048 MHz clock
PHDECT
2nd pair
DECT clock
NHDECT
Table6: Wiring of synchronisation ports
10/2008
RJ45 J6
PHBIT 3
NHBIT 6
4
5
RJ45 J3
3
6
4
5
Page 8-152