Aastra NeXspan C, Руководство по установке

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AMT/PTD/PBX/0020/2/4/EN 01/2007 Page 171
• SYNCHRONIZATION: this parameter indicates the type of synchronization:
• synchronization via M bit of the S frame
• external synchronization using an additional pair (master base station)
• external synchronization using an additional pair (slave base station).
Note: If the DECT base stations are connected to the integrated S0 accesses of the
NeXspan S CPU card, a third pair is required for synchronization (use external
synchronization via an additional pair).
• TS ASSIGNMENT AND FREQUENCY ALLOCATION: these are default values and should
not be changed.
• ANTENNA SELECTION: it is possible to connect two external antennas to the upper
connectors of the base station. In this case, it may be necessary to force antenna selection. In
the majority of cases enter "AUTOMATIC".
• DISTANCE FROM MASTER BS:
1 If synchronization is via the M bit, the distance is that between the base station and the S0
interface master card.
2 If synchronization is external (slave base station), this option compensates for propagation
time due to the distance between the master base station and the slave base station.
• The master base station should be located as close as possible to the distribution frame.
• Specify the distance between the slave base stations and the master base station in
100-meter intervals.
• TYPE OF BUS: SHORT / LONG
This option allows you to manage signal attenuation according to the distance between the
PBX and the master base station (Short bus <130 m and long bus > 130 m).
• Putting the radio base station in service
In the previous screen "RAD. BASE DEFIN."
• Validate the base station parameters.
• The base station is automatically put in service by downloading through a PLL link via
the S0 interface.