Configuring the Slave Chain

This describes how to configure a slave chain to add a path between BTSs or between a BTS and the BSC.

Scenario	BSC initial configuration
Mandatory/Optional	Optional. A slave chain should be added when there are insufficient transmission paths between BTSs or between a BTS and the BSC.

CAUTION:

• A site chain should not be added between BTSs that are configured on the Abis interface boards in different subracks.
• If two BTSs are configured on two boards that are in different work modes, a slave chain cannot be established between the two BTSs.
• The IP-based BTS does not support the configuration of the slave chain.
• If the BTS is in HDLC transmission mode and the OML is configured on port 1 of the BTS, no slave link can be configured on port 0 of the BTS.

Prerequisites

Preparation

NOTE:

The following takes how to add a slave chain between a DBS3900 GSM and a GEIUB in the GMPS as an example.

Table 1 Example of the data negotiated and planned for configuring a site chain

Parameter	Example	Source
GE(O)IUB Subrack No.	0 Subrack	BSC internal planning
Board Slot No.	Slot 26	BSC internal planning
Port No.	GEIUB Port 2	BSC internal planning
Site Port No.	1 Site Port	BSC internal planning

Procedure

1. On the BSC6000 Local Maintenance Terminal, right-click the BTS to be operated.
2. Choose Add or Delete Site Chain from the shortcut menu. A dialog box is displayed, as shown in Figure 1.
   Figure 1 Add or Delete Site Chain dialog box
   
   

3. Select the BTS, and then click Add or Delete Chain. A dialog box is displayed, as shown in Figure 2.
   Figure 2 Add and Delete Site Chain dialog box (2)
   
   

4. Click New Port. A dialog box is displayed, as shown in Figure 3.
   Figure 3 Add Site Chain dialog box
   
   

5. Set the parameters by referring to Table 1.
6. Click OK to save the settings and return to the dialog box shown in Figure 2.
7. Click OK to return to the dialog box shown in Figure 1.
8. Click Finish. The configuration of the site chain is complete.