Hi Dufour,
We have not tried this, but I think that it will accomplish what you are looking for;
Selective Call Forwarding
You can selectively apply call forwarding for a busy or no-answer ephone-dn based on the number that callers have dialed to reach the ephone-dn: the primary number, the secondary number, or either of those numbers expanded by a dial-plan pattern.
An ephone-dn automatically creates one POTS dial peer when it is given a primary number using the number command. If the ephone-dn is given a secondary number, it creates a second POTS dial peer. If the dialplan-pattern command (under telephony-service configuration mode) is used to expand the primary and secondary numbers for ephone-dns, it creates two more dial peers, resulting in the creation of the following four dial peers for the ephone-dn:
A POTS dial peer for the primary number
A POTS dial peer for the secondary number
A POTS dial peer for the primary number as expanded by the dialplan-pattern command
A POTS dial peer for the secondary number as expanded by the dialplan-pattern command
Normally, call forwarding is applied to all dial peers created by an ephone-dn. However, if you use the primary, secondary, or dialplan-pattern keywords in the call-forward busy and call-forward noan commands, you apply those types of call forwarding only to the dial peers you have specified, based on the exact called number that was used to route the call to the ephone-dn.
For example, the following commands set up a single ephone-dn (ephone-dn 5) with four dial peers:
telephony-service
dialplan-pattern 1 40855501.. extension-length 4 extension-pattern 50..
ephone-dn 5
number 5066 secondary 5067
In this example, selective call forwarding can be applied as follows:
Use the primary keyword to forward calls when callers dial 5066.
Use the secondary keyword to forward calls when callers dial 5067.
Use the dialplan-pattern keyword to forward calls when callers dial 4085550166 or 4085550167.
12.4(9)T
12.4(4)XC
Selective call forwarding - Call forwarding for busy and no-answer ephone-dns can be applied selectively based on the number that a caller dials for a particular ephone-dn: the primary number, the secondary number, or either of those numbers expanded through the use of a dial-plan pattern.
From this CME 4.0 doc
http://www.cisco.com/en/US/products/sw/voicesw/ps4625/products_configuration_guide_chapter09186a00806a8300.html#wp1005556
Hope this helps!
Rob
