User's Manual Part 2

RBS 2109 User’s Guide
Table 40 PCM Parameter Settings for Transmission Interface T1, Long Haul
Automatically
PCM Parameter Setting
Transmission Interface DS1(T1)
Network Topology See Site Installation Documentation.
Sync Source See Site Installation Documentation.
LBO A
LBO B
LBO C
LBO D
See instructions below
FDL Use See Site Installation Documentation.
The instructions below describe how to set the PCM parameters automatically.
For RBS 1 only:
1. Set LBO A (C) to ‘‘Long h. ALBO, <value of the maximum
input signal
level> dB’’.
2. If stand-alone, then set unused ports to ‘‘Short h., 0 – 133 feet’’. Unused
ports are always set to ‘‘Short h., 0 – 133 feet’’.
The RBS automatically sets the correct value in the IDB when the IDB
is installed.
Note: The following instructions are for multidrop only.
If multidrop is used, the line attenuation for RBS 1 must be measured according
to the instructions below.
For RBS 1:
1. Set LBO B (D) to ‘‘Long h., 0 dB’’. Used B (D) ports in multidrop are always
set to ‘‘Long h., 0 dB’’.
2. On the RBS 2000 menu, click Connect.
3. On the Configuration menu, click Install IDB.
The RBS automatically sets the correct value in the IDB.
The RBS remains in Local mode after the IDB has been installed.
4. On the Maintenance menu, click Monitor.
5. In the Available monitors box, select ‘‘Line Attenuation for PCM-A’’ (C) and
click → to add ‘‘PCM’’ in the Monitors to start box. See figure below.
129EN/LZT 720 0090 Uen R1A 2004-09-17