[cisco-voip] caller id in hunt groups

[Alex de GRUITER]

You can use on-net translations so that the source number appears as
the hunt pilot DN. Instructions follow (original source:
http://www.ccievoicestudy.com/Cisco/VoIP/On-Net_Masking/)

Using translation patterns it is possible to mask DN A when it calls
DN B so that it appears as DN C.

* Configure a translation pattern to match the number of digits used
in the dial plan (i.e. 4 digits is XXXX)
* Configure the translation pattern in the CSS assigned to DN A
* Configure the Called Party Mask as the DN of Phone C
* Configure the CSS on the translation pattern with a CSS that
includes DN B. Important: ensure DN B does not appear in the CSS of DN
A, since this would be a most specific match

Note that Calling Name is still presented, irrespective of Mask. This
can either be restricted under the translation pattern, or the
alerting name under the line can be altered.