Caller ID when transfering calls

[agree]

Hi, I have 2 gateways one is for incoming calls and a second for outgoing calls. The problem is, the incoming provider sets the caller id without a 1 prefix
for ex. 1212-123-456 will be 212-123-456. When I transfer an incoming call the outbound gateway takes the same caller id and appears wrong on mobile phones . is there a way to set the outbound route should append a 1 to when transferring a call or to append a 1 to incoming calls?

THANKS

 

[agree]

I solved it by adding to inbound route dialplan , effective_caller_id_number=1${caller_id_number}