We have a site which has just installed SIP trunking to replace the BRI trunks. The system is in the UK.

The BRI trunks detected the local area code so if someone dialled 123456 then it automatically knew it was a local call and the area code prefix wasn't required.

The SIP trunks don't do this. Many of our users are dialling 123456 and the carrier is saying it cannot connect the call.

How can we add a prefix of the area code say 02101 when the first digit dialled after the 9 is not a zero?

LCR should be able to do what you are asking

Thanks for your reply. sorry I didn't give full information of what I have tried but I don't seem to be able to get a prefix. screen shots are below:

You'll need to put the LCR as feature code 9 and put the sip trunk back on 805 etc. Also make sure LCR is switched on in 210.

Make sure to put 9 back into any call forwards/speed dials/hot line after you set it as the LCR digit.