Setup Call Centric Trunk for E-MetroTel UCx

Here's the text for "PEER Details".  Just copy and paste into your UCX, but change the user account info and secret (the sip password).

username=[insert CallCentric Acct # & SIP extension]
type=peer
secret=[insert sip user password]
qualify=yes
nat=no
insecure=very
host=callcentric.com
fromuser=[insert CallCentric Acct# & SIP extension]
fromdomain=callcentric.com
dtmfmode=rfc2833
disallow=all
context=custom-get-did-from-sip
canreinvite=yes
allow=ulaw

Then, there is the USER details section:

context=to-callcentric

type=friend

defaultuser=[3 digit user extension]

secret=[insert sip user password]

host=dynamic

Lastly, the Register string

[Call Centric account # and SIP extension]:[SIP password]@callcentric.com/[CallCentric Acct no.]