VG for calls with access via SIP URL
You can configure a gateway with a SIP URL as the access number that the device accesses over
one of the SP trunks. For example, you can set the gateway access number as SP1("some-sip- s
erver.mydomain.com"), or SP2("192.168.15.111:5062"), etc.
When using an SP trunk to access a (SIP) gateway, the device:
● Doesn't use the outbound proxy, ICE, or STUN regardless of the settings on the SP trunk.
● Uses only the device's local address as the SIP Contact, and ignores any NATed address
discovered by the device.
● Uses the gateway's SIP URL to form the FROM header of the outbound INVITE.
● Uses the gateway's AuthUserID and AuthPassword for authentication.
● Applies the symmetric RTP concept.
For more information on Voice Gateway parameters, see the Voice Gateway Parameter Guide table
in the Parameter Reference Guide.
Trunks
Each supported voice service on your device is referred to as a
trunk
, from the telco term for a
physical wire or wires that deliver phone services to homes or businesses.
Each trunk is represented with 2-letter abbreviation and a 1-based instance identifier:
● SP1 = the SP1 Voice Service (with ITSP A, B, C, D, E, or F)
● SP2 = the SP2 Voice Service (with ITSP A, B, C, D, E, or F)
● SP3 = the SP3 Voice Service (with ITSP A, B, C, D, E, or F)
● SP4 = the SP4 Voice Service (with ITSP A, B, C, D, E, or F)
● PP1 = the OBiTALK Service
When configuring your phones, you can omit the instance identifier if it’s equal to 1. For example,
PP is equivalent to PP1. You use these short-hand notations heavily when configuring your phone,
as they’re found in call routes, call forward numbers, and speed dials parameters. Unless stated
otherwise, the abbreviated trunk names are case insensitive.
Trunk Groups
A trunk group is a group of trunks. If a call is routed to a trunk group, your phone picks one of the
available trunks from the group to make the call.
The availability of a trunk is based on the following criteria:
● Whether the trunk’s digit map allows the number to call, AND
● Whether the trunk has capacity to make one more call
You can configure as many as four trunk groups on your phone.
Trunks
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