Phones Connected to IAD Cannot Make Calls to Fixed-Line Phones in a Specified Province

Symptom

Phones connected to IAD cannot make calls to fixed-line phones in a specified province but can make calls to fixed-line phones in other provinces. Fixed-line phones in the province can make calls to phones connected to IAD properly.

Network:

POTS-A-IAD-*** NGN

Cause

Network exceptions
Incorrect digitmap configuration on the softswitch

Solution
Check whether the IAD is properly registered with the softswitch.
If yes, go to 5.
If no, go to 2.

Check whether the network is disconnected.
If yes, rectify the network fault.
If no, go to 3.

Run the display sip attribute command to view the IAD protocol mode.
(For SIP mode only) Run the display sip attribute command to view the digit-map position value.

If the digitmap of the softswitch is used, the softswitch sends the digitmap to the IAD in the 200 OK message. Check whether the digitmap delivered by the softswitch is correct, as shown in Figure 1.
◾If no, modify the digitmap configuration on the softswitch.
◾If yes, go to 6.

Figure 1 Digitmap delivered by the softswitch using SIP

(For MGCP mode only) Capture packets to view the digitmap of the softswitch in the MGCP mode.

The softswitch sends the digitmap to the IAD in the RQNT message, as shown in Figure 2. If the number length in the digitmap is configured to 11 digits, but the called number consists of 12 digits, only 11 digits of the called number are reported. Therefore, an incorrect number is reported. Check whether the digitmap is correct.
If no, modify the digitmap configuration on the softswitch.
If yes, go to 6.

Figure 2 Digitmap delivered by the softswitch using MGCP

Contact Huawei technical support.