ZiglioNZ:grudge: Here's some information on dialing plans on Cisco units, hope this helps :
http://www.cisco.com/en/US/products/ps10033/products_qanda_item09186a0080a35a44.shtml
he he, it's really a RegEx! Trying now...
Ok, I added SBiddle's Dial Plan and it didn't work.
Found alternative settings here
([2-9]xxxxxx|0[34679][2-9]xxxxxx|0210xxxxxxx|021[12]xxxxxx|021[3-9]xxxxx|02[0279]xxxxxxx|0204xxxxxxx|0240xxxxxx|024[1-9]xxxxxxx|0282[4-5]xxxxxx|050xxxxxxx|070xxxxxxx|080xxxxxxx|00xxxxxxx.|01[08]|017xx|12[356]|[19]11|*55|023xxxxxxxx|01[1234569]x.|02[56]x.|028[013456789]x.|0282[0123467890]|0282[01236789]|05[1-9]x.|08[1-9]x.|0[34679][0-1]x.|1[03456789]x.|11[023456789]x.|12[0124789]x.|*[012346789]x.|*5[012346789]x.)
Good as gold now, I've still got a lot to read about SIP. The protocol itself shouldn't be too hard.
I did a bit of reading for an interview with OpenCloud
That was a while ago... ;-)
Thank you everyone