I’ve successfully used the settings below with Asterisk@Home 1.3 & 1.5 and Teliax Pay-As-You-Go:
Add a IAX Trunk:
Maximum channels: (blank)
Outgoing Dial Rules
1+NXXNXXXXXX
1{AC}+NXXXXXX
Trunk Name: teliax
PEER Details:
allow=ulaw
auth=md5
context=from-pstn
disallow=all
host=voip-co2.teliax.com
nat=yes
secret={Your Teliax secret}
type=friend
username={Your Teliax userid}
User Context: (leave this blank)
User Details: (leave this blank)
Register String:
{Your Teliax userid}:{Your Teliax secret}@voip-co2.teliax.com
NOTE1: Replace {Your Teliax userid} with your Teliax user id.
NOTE2: Replace {Your Teliax Secret} with your Teliax SIP secret.
THIS IS NOT YOUR WEB PAGE PASSWORD! Your secret can be determined on the Teliax site by looking here: Support / SIP-IAX Account Settings / Password
Next add a DID Route: (Only if your Teliax account includes a DID number)
DID Number: {Your Teliax DID Number}
Set Destination: Use ‘Incoming Calls’ settings
Phone System 