How to strip the first digit of a number?

Asterisk Asterisk Support
1

Folks,

Our VOIP provider gives us a file that defines a context called [outgoing]. Here is a sample:

[outgoing]
…
exten => _1NXXNXXXXXX,n,Dial(SIP/+${EXTEN}@${VOICEPULSE_GATEWAY_OUT_A})
exten => _1NXXNXXXXXX,n,GotoIf($[${DIALSTATUS}=CHANUNAVAIL]?${EXTEN}|GatewayB)
exten => _1NXXNXXXXXX,n(GatewayB),Dial(SIP/+${EXTEN}@${VOICEPULSE_GATEWAY_OUT_B})

…

The context used for our internal Cisco phones is FromCiscoPhone.

[FromCiscoPhone]

exten => 101, blah
exten => 102, blah…

At the end of our internal extensions, if the number starts with 9, indicating it is an external phone number, I would simply like to invoke [outgoing]. I also need to strip the first digit (9) before invoking [outgoing].

Can someone please tell me how I can achieve this?

Thank you in advance for your help.

Regards,
Peter

2

try something like:
exten => _9NXXXXXX,1, dial(SIP/${EXTEN:1})
this will strip the first digit of your extension