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Caller ID on PSTN FXO line with UC540

perfecta9800
Beginner
Beginner

I have a UC540 with an analogue PSTN line with caller ID activated on that line.

When I use a standard fixed telephone on the above PSTN line, I can see the number of the person who is calling me (Caller ID).

When I connect the same analogue PSTN line on my UC540, I always get 'anonimous'. I can't see the caller's number.

How can I fix this because the caller ID is important to me. On internet, I read that there are two protocols (DTMF and FSK) for caller ID on PSTN lines, but I can't find which protocol the Cisco UC540 is using. I have looked into the settings of the FXO ports on the Cisco UC540, but I can't find any information.

Can anybody help me?

PS: I'm from Belgium (Europe).

3 Replies 3

paolo bevilacqua
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

The protocol is automatically selected depending of the cptone configured under voice-port.

Add these lines to the voice port

voice-port 0/1/0

     caller-id enable

     caller-id alerting line-reversal

     caller-id alerting dsp-pre-allocate

I had this issue with analogue line connected to my FXO port and the above resolved it.

Hope this helps you.

I found this gem to fix my caller-id issue.

Works like a charm.

I am using a GSM gateway and I only needed to add.

translation-profile incoming 4000

Thanks dude!

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