; Voice OSS example for a registration-based SIP trunk.
; Replace every value in angle brackets. Provider requirements vary.

[transport-udp-nat]
type=transport
protocol=udp
bind=0.0.0.0:5060
local_net=<PRIVATE_CIDR>
local_net=127.0.0.1/32
external_signaling_address=<PUBLIC_IP>
external_media_address=<PUBLIC_IP>

[carrier-registration]
type=registration
transport=transport-udp-nat
outbound_auth=carrier-auth
server_uri=sip:<SIP_HOST>
client_uri=sip:<ACCOUNT_ID>@<SIP_HOST>
contact_user=voice-ai
retry_interval=60

[carrier-auth]
type=auth
auth_type=userpass
username=<SIP_USERNAME>
password=<SIP_PASSWORD>

[carrier-aor]
type=aor
contact=sip:<SIP_HOST>:5060
qualify_frequency=30

[carrier-endpoint]
type=endpoint
transport=transport-udp-nat
context=from-carrier
disallow=all
allow=ulaw
outbound_auth=carrier-auth
aors=carrier-aor
direct_media=no
rtp_symmetric=yes
force_rport=yes
rewrite_contact=yes

[carrier-identify]
type=identify
endpoint=carrier-endpoint
match=<CARRIER_SIGNALING_CIDR>