asterisk users - Dec 2004 - Aditional local number when calling from ISDN thtough Capi to local extension ?

Hi,

I have BRI ISDN access. Now I'd like to call from ISDN phone and type phone
number of Asterisk server like 123456 and then imediately add numbers for
local extensions (like 12345611), so call would go directly local extension
11.

I'd like to achieve this functionality through Fritz and Capi. Is this
possible ? In what ways can I do that ?

Thanks in advance,

regards,

Rob.