[asterisk-users] CallerID number not being displayed on SIP phones

[Daryl Jones]

I'm having trouble with Cisco 7960 and Linksys SPA-942 SIP phones not 
displaying the Caller-ID number.  The Caller-ID name is displayed, but 
not the number.  Instead, the phones always display the value that's set 
in the fromuser= parameter in sip.conf.  If fromuser= is not set, then 
the literal "asterisk" is displayed in the calling number field on the 
telephone sets.

Can I dynamically set the fromuser= value to the CallerID number in 
extensions.conf?

How can I solve this problem?

Asterisk v1.2.9
Cisco 7960 firmware P0S-3-07-4-00.