sip.conf:
[sipgf7-us]
host=46.19.209.14
dtmfmode=rfc2833
dtmf=rfc2833
type=peer
context=from-didww
insecure=very
nat=never
allow=all
[sipgf7-eu]
host=46.19.210.14
dtmfmode=rfc2833
dtmf=rfc2833
type=peer
context=from-didww
insecure=very
nat=never
allow=all
extensions.conf:
[from-didww]
exten=> 972775654199,1,Dial(SIP/100)