Aastra NeXspan C, Руководство по установке

Страница: 24 / 196

Page 24 01/2007 AMT/PTD/PBX/0020/2/4/EN
In cases where old wire is to be reused, it is recommended to carry out 4 tests:
1 cross-talk measurements at 100 kHz (decoupling check and detection of any cross-talk)
2 near-end cross-talk measurements (> or = 60dB)
3 degeneration measurements at 10khz (alpha < 6 dB)
4 loop resistance measurements (R loop = R termi R cable)
To facilitate connection to the base station, it is recommended to use:
• either a female RJ45 wall jack, and approximately 20 cm of flat RJ45-RJ45 cable,
• or a long male RJ45 jack if the cable is to be connected directly to the base station.
When installing the base station on the support, feed the cable through the indented upper part
of the base station designed for this purpose.
Note: the DECT base station is a restricted access device. Installation and maintenance
must only be performed by qualified personnel.
Old M6241 base station connections
The base station is connected to its environment using 4 connectors:
• J1: HE14 connector - 5 pins, used for a debug console (reserved for the factory)
• J201: RJ45 female connector for connection to the PBX:
- 4
pins are used for connection to the S0 Basic Rate Interface (pins 3 to 6)
-
2 pins are used for connection to the synchronization signal (pins 1 and 2), for
synchronization by 3rd pair
.
Note: The RSx pair carries the S0 BRI receive signals from the PBX.
The ESx pair carries the S0 BRI transmit signals to the PBX.
Pin 1 2 3 4 5 6 7 8
Signal SYNC+ SYNC- ESa RSa RSb ESb - -