Asterisk PBX for use with VoIPtalk Setup (SIP Trunk)

Click here to find out how to configure your Asterisk PBX to receive incoming calls from VoIPtalk.

Once you have received you SIP account activation details then you are ready to make calls using your Asterisk server.

Outgoing PSTN SIP Trunk:

The preferred method of configuring Asterisk is by using a combination of the sip.conf and extensions.conf files. The sip.conf file enables you to have much more configuration control over your SIP connection, allowing you to control things such as codec priorities, trunking, etc. For connection to VoIPtalk, a basic sip.conf entry would be:
```
[general]
register => USERID:PW@voiptalk.org/USERID

[voiptalk]
type=friend
username=USERID
secret=PW
fromuser=USERID
host=voiptalk.org
dtmfmode=rfc2833
fromdomain=voiptalk.org
context=default
insecure=very
```
The corresponding entry in extensions.conf would be:
```
[outbound]
exten => USERID,1,Dial(SIP/extension)
exten => _0[1-9].,1,Dial(SIP/voiptalk/${EXTEN})
exten => _00[1-9].,1,Dial(SIP/voiptalk/${EXTEN})
```
where USERID is your VoIPtalk ID, PW is your VoIPtalk password and voiptalk is the name of the SIP entity created in sip.conf for your VoIPtalk account.
SIP to SIP Calls:

To make free SIP calls to any VoIPtalk ID add the following to extensions.conf:
```
exten=> _8[1-9].,1,Dial(SIP/${EXTEN}@voiptalk)
```
Dialling Other Networks:

Please configure your extensions.conf locally for other networks.
To access our special numbers, you will need to add an extra dial string into your dial plan:
```
exten => _9XX,1,Dial(SIP/${EXTEN}@voiptalk)
```
All special numbers are 4 digits on length and start with the 09 prefix.
- 0900 - Dial VoIPtalk Customer Services
- 0902 - Welcome Message
- 0903 - Speak your extension
- 0904 - Echo test
- 0923 - Speaking Clock

Note: In the interests of security, please do not use your default context for outbound call validation.