I have asterisk hooked up to 3 ISDN2 lines in the UK. At present we have 14 extensions, each bound to a seperate external number (e.g. 020 7613 ***0, 020 7613 ***1, 020 7613 ***2 etc). When we make outbound calls, the callerid for our number is always the first extension, 020 7613 ***0.
Is there any easy way to get the callerid to show the number bound to that specific phone, rather than the first one?