Tuesday, September 16, 2014

Fix "Unknown" CLID on CUCM phone

I'm trying to get an Android app on the Cisco DX series phones to pull the caller ID field of the current call. If the call comes through UCCE, the caller ID number (or string, in this case) comes through fine. If the call goes directly to the extension, the expected caller ID is displayed while the phone is ringing, but then displays "Unknown" as the caller ID at the top of the call screen - and this is what my Android app is seeing.

To fix this, I had to turn off all options except "Caller Number" in the "Forwarded Call Information Display on Device" section of the device's line settings. Here's a screenshot of the settings on a device:


and here's where you would change it in the auto-registration template:

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