Connecting Incoming Calls Through the FXO Port on the IAD Takes as Long as 15 Seconds

Hi, all!

Have a nice day to you!

This topic describes how to deal with the problem that connecting incoming calls through the FXo port on the IAD takes as long as 15 seconds.

Possible Cause

The possible cause is that the CLIP service has not been enabled for the PSTN number.

Solution

1. Check whether the CLIP service is enabled for the PSTN number. (You can test the CLIP service directly on the PSTN network.)

• If no and the CLIP service is required, contact the carrier to enable the CLIP service.
  

• If no and the CLIP service is not required, go to Step 2.
  

Configure the FXO port.

Run the following command:

TERMINAL(config)#sip user 0 fxo-clip no

NOTE:

This command is available only for IADV300R001C03SPC900, IADV300R001C04SPC300, and later versions. You are advised to upgrade older versions to one of the preceding versions.

Thanks for reading!