I have successfully built and made asterisk talk SIP extension to SIP extension, read all the docs, and about 1000 emails from the archive. The trunk side of Asterisk, from the docs perspective, is a smidgin TDM-centric, Analogue, T1, zaptel.conf etc..... Asterisk cares not about the externally presented digits as the telco KNOWS which time-slot or analogue line the call came from I live in an hybrid H323 IP trunk world, and when dialing out, I see the dialled digits in the (non-asterisk) H323 debug traces along the with the 4 digit extension code as the src digits. How do you prepend the remainder of the number to the src digits? extension = 2201 external view 460 899 2201 Or do I need to make up two extension values, and only use one internally, and the other externally...... Ta muchly -- \_ Roger De Salis rdesalis at fx dot net dot nz </' FX Networks +64 21 481 452 /) Wellington, New Zealand roger at desalis dot gen dot nz (/ ` Bentley win Le Mans! - What next, English win cricket in Aus?