Adding an SS7 Signaling Link

This describes how to add an SS7 signaling link on the A interface. This link is responsible for the signaling transmission between the BSC and the MSC.

Scenario	BSC initial configuration and BSC capacity expansion
Mandatory/Optional	Mandatory

NOTE:

• The SS7 signaling link can run at 64 kbit/s and 2 Mbit/s. The 2 Mbit/s signaling link can be 2.048 Mbit/s or N x 64 kbit/s (1<N<32). Only one rate type can be selected for one BM subrack.
• Each 2 Mbit/s signaling link can be configured with different bandwidths. The SS7 signaling links are in load sharing mode. Therefore, Huawei recommends that all the SS7 signaling links be configured with the same bandwidth. Each 2 Mbit/s signaling link can be the combination of any timeslots (except for timeslot 0) on an E1.
• One pair of signaling points can be configured with up to 16 SS7 signaling links.
• A minimum of two 2 Mbit/s signaling links must be configured between a pair of signaling points. Huawei recommends that these two signaling links be configured on different E1s/T1s or different STM-1s.
• Each GMPS or GEPS can be configured with up to thirty-two 64 kbit/s SS7 signaling links.
• Each GMPS or GEPS can be configured with up to eight 2 Mbit/s SS7 signaling links. In E1 transmission mode, the total bandwidth of all the links should not exceed 4 Mbit/s. In T1 transmission mode, the total bandwidth of all the links should not exceed 3 Mbit/s.
• The GEIUA/GOIUA board is already configured with other links of different type. You should reset the GEIUA/GOIUA if you need to configure this link.
• To improve the reliability of signaling links, on each Ater interface board (in the case of BM/TC separated mode) or A interface board (BM/TC combined mode), the total bandwidth cannot exceed 2M, and the number of signaling links cannot exceed two. It is recommended that the signaling links be distributed evenly on multiple interface boards.

Prerequisites

Preparation

NOTE:

• The following procedure takes how to configure a 64 kbit/s SS7 signaling link on the GEIUA in the GTCS as an example.
• For details about the configuration of the 2 Mbit/s signaling link, refer to Configuring High-Speed Signaling.

Table 1 Example of the data negotiated and planned for adding an SS7 signaling link

Parameter	Example	Source
Ater Connection Path Index	0	BSC internal planning
BM Subrack No. of Ater Connection Path	0	BSC internal planning
Rate Type	64 kbit/s	Negotiation with the peer
A Subrack No.	7	BSC internal planning
A Slot No.	20	BSC internal planning
A Port No.	0	BSC internal planning
Ater Timeslot Mask	TS19	BSC internal planning
A Interface Timeslot Mask	TS16	Negotiation with the peer
SLC	1	Negotiation with the peer
SLC Send	1	Negotiation with the peer

Procedure

1. On the BSC6000 Local Maintenance Terminal, right-click GEIUA in the GTCS.
2. Choose Configure SS7 Signaling Link from the shortcut menu. A dialog box is displayed, as shown in Figure 1.
   Figure 1 Configure SS7 Signaling Link dialog box
   
   

3. Click Add. A dialog box is displayed, as shown in Figure 2.
   Figure 2 Adding an SS7 signaling link (MTP2)
   
   

4. On the MTP2 tab page, set the parameters by referring to Table 1.
   NOTE:

   The number of timeslots on the A interface must be the same as that on the Ater interface.

5. Click the MTP3 tab. The tab page is displayed, as shown in Figure 3.
   Figure 3 Adding an SS7 signaling link (MTP3)
   
   

6. Set the parameters by referring to Table 1.
7. Click OK to return to the dialog box, as shown in Figure 1.
8. Click Finish. The addition of the SS7 signaling link is complete.