Incoming Calls Fail to Be Transferred from the Switchboard to the Extension Using the FXO Port on the IAD132E(T)

Possible Cause

The possible causes are as follows:

• The SoftCo encounters problems.
• The FXO port is not bound to the virtual user (VU) prefix of the SoftCo.
• The IAD is in local switch state.
• No SIP trunk is configured for the IAD.

Solution

1. Verify that the FXO port on the IAD has been bound to the VU prefix.
2. Capture IAD logs and network packages to check whether the IAD sends the Invite message to the SoftCo.
   • If yes, go to Step 3.
   • If no, verify that the SIP trunk has been configured for the IAD. If no SIP trunk is configured, run the sip peercomponent addressstringcommand to add the SoftCo IP address on the IAD.

3. Check whether the IAD is in local switch state.
   • If yes, run the sip local-call disable command to disable local switch.
   • If no, go to Step 4.

4. Contact your service provider for assistance.