User's Manual Part 2

RBS 2308 and RBS 2309 User’s Guide
In this example, Fa
r End and RBS refer to the figure above.
Maximum input sign
al level at the Far End is -15 dB.
The cable attenuati
on is not known.
1. Set LBO A to “Long h
. ALBO, -15 dB”.
The cable attenuati
on is measured by the RBS to 5 dB.
2. The value of LBO A i
s set automatically by the RBS.
3. Set LBO B, C and D (n
ot connected) to
“Short h., 0 - 133 feet
”.
Example 8 Calculating LBO Parameters Automatically for Long Haul
Defining LBO Parameters when Transmission Characteristics are
Unknown
This section describes how to define the LBO parameters if none of the
parameters carrier-advised code, maximum input signal at the c ustomer
interface, cable attenuation, or cable length are known.
1. On the Configuration menu, click Define and PCM.
2. Set the parameters according to the table below. Click OK when all
parameters are set.
Table 48 PCM Parameters Settings for Transmission Interface T1,
Transmission Characteristics Unknown
PCM Parameter Settings
Transmission Interface DS1(T1)
Network Topology
See Site Installation Documentation
Sync Source See Site Installation Documen
tation
LBO A “Long h., 0 dB”
“Long h., 0 dB”, if usedLBO B
“Short h., 0 – 133 fe et”, if unu
sed
“Long h., 0 dB”LBO C
“Short h., 0 – 133 fe et”, if unused
“Long h., 0 dB”, if usedLBO D
“Short h., 0 – 133 fe et”, if unused
FDL Use
See Site Installation Documentation
7.6.12 Defining TEI
This section describes how to define the TEI value for the IXU.
To enable the BSC to communicate with the IXU of an RBS in a cascade chain,
a unique TEI value between 12 and 63 needs to be set for each RBS in the
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EN/LZT 720 0027 Uen R8A 2006-06-27