Com.X Administrator Guide
Page 111
Field
Content
Proxy
The SIP proxy to use when establishing outgoing connections in
peer to peer setups. This will in most cases be left blank when
registering with a service provider, although some service providers
may require registration via a SIP proxy.
Proxy port
The port on which the SIP proxy service resides (defaults to 5060)
From user
Defaults to the extension number of the initiator of the SIP call. If
the provider rejects the registration, the from user might need to be
set to the provider's registration / account / username. The from-
user field only affects SIP calls, and not SIP trunk registration.
This fields overrides the caller ID number sent in the SIP call setup
headers.
From domain
A domain to append to the from-user during call setup. I.e. from-
user@from-domain.
Auth user
An authentication username to use during SIP registration and call
setup.
NAT
When enabled, the system ignores the SIP and SDP headers'
address and port and replies to the sender's address and port. This
should be enabled when the Com.X is located behind a NAT router.
Secure
If this is setting is enabled, after registration with the SIP provider,
all invites will require successful authentication as well as port
number matching.
Disabling this settings allows invites to proceed without further
security requirements after successful registration.
Skype
Indicates that the trunk is to connect to a Skype Connect SIP server
and configures Skype-specific trunk parameters appropriately.
Retry
registration
If network problems result in trunk intermittently becoming
unavailable, enable this option in order to keep retrying registration
every 30 seconds, indefinitely. If this option is disabled, registration
attempts will stop after 10 failed attempts.
Qualify
connection
When enabled, checks the reachability of the peer every 60
seconds.
Note: SIP trunk qualification is an additional (non-standards-
based) feature which allows for monitoring of SIP trunks. Not all
SIP providers support this additional feature. For providers that do
not support this add-on feature, the standard SIP trunking
configuration is recommended (Qualify turned off)
Contact # for
incoming
A DID number to assign to incoming calls on this SIP trunk. This
facilitates inbound routing where the DID is not provided by the SIP
provider.
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