[VoIP] Display 10-Digit Caller ID on SIP Phones?

[Jonathan Taylor]

I have an Asterisk 1.4 installation with a combination of SIP phones and
analog phones, connected to both a VoIP gateway and a POTS line.  Most of
the incoming calls come in though the POTS.

Incoming calls are displayed on the SIP phones (Cisco 7940) as
<num>@<address>, where <num> is the 10-digit phone number and <address> is
the IP address of my PBX.

Is there a way to configure the system (or the phone) to display only the
10-digit number?  That would reduce clutter on the display and allow other
phone functions to work more smoothly, IMO.

Thanks