Checking The Transmission Between Btss In Ring Topology; Figure 4-8 Site Device Panel Tab Page - Huawei BTS3900 GSM Commissioning Manual

4 Commissioning the BTS (Transmission Available)

Figure 4-8 Site Device Panel tab page

Step 3 On the BTS side, check the physical connection between the BBU of the level 1 BTS and BBU
of the level 2 BTS. Normally, the T1 of the first E1/T1 of the level 2 BTS should be connected
to the R2 of the second E1/T1 of the level 1 BTS, and the R1 of the first E1/T1 of the level 2
BTS should be connected to the T2 of the second E1/T1 of the level 1 BTS.
l
l
Step 4 On the BTS side, see
BTS and BBU of the level 3 BTS.
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4.2.3 Checking the Transmission Between BTSs in Ring Topology

This describes how to check the transmission between BTSs in ring topology. The following
description is based on three BTSs in ring topology.
Prerequisite
The physical connection between BTSs in ring topology on the BTS side is complete.
Context
l
4-8
If the link is normal, the status of the LIU1 LED on the level 1 BTS and the LIU0 LED on
the level 2 BTS changes from ON disconnected to OFF connected.
If the link is still not normal, contact Huawei technical support engineers on the BTS side
for troubleshooting.
Step 3
Figure 4-9 shows the connection between BTSs in ring topology. A, B, C, and D show the
positions where the link may be broken during the ring topology transmission.
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to check the physical connection between the BBU of the level 2
BTS3900(A) GSM
Commissioning Guide
Issue 02 (2009-04-20)