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Chapter 4: Configuring your MVPGSM
Multi-Tech Systems, Inc. MVPGSM 36
SIP Call Signaling Parameter Definitions
Field Name Values Description
SIP Parameters
Signaling Port port Port number on which the MultiVOIP GSM UserAgent software module will be
waiting for any incoming SIP requests. Default = 5060
Use SIP Proxy Y/N Allows the MultiVOIP GSM to work in conjunction with a proxy server.
Allow Incoming
Calls Through SIP
Proxy Only
Y/N When selected, incoming calls are accepted only if those calls come through the
proxy.
Proxy Domain
Name / IP Address
n.n.n.n Network address of the proxy server that the MultiVOIP GSM is using.
Alternate Proxy 1
and 2
-- A first and a second alternate SIP proxy server can be specified for use by the
VOIP for situations where the Primary proxy server is otherwise unavailable.
SIP Proxy
Parameters
This is the preferred SIP proxy server for controlling the traffic of the current
VOIP.
Append SIP Proxy
Domain Name in
User ID
Y/N When checked, the domain name of the SIP Proxy serving the MultiVOIP GSM
gateway will be included as part of the User ID for that gateway. If unchecked,
the SIP Proxy’s IP address will be included as part of the User ID instead of the SIP
Proxy’s domain name.
Port Number port Logical port number for proxy communications. Default = 5060
Default Subscriber This is used as the default end point register with a Proxy.
Default Username name If the Username is not populated in the Phone Book, this is the Username that
will be used. This works the same for the password as well.
Password passwor
d
Password for proxy server function. See “Default Username” description above.
Re-Registration
Time
10
–
65535
seconds
This is the timeout interval for registration of the MultiVOIP GSM with a SIP
proxy server. The time interval begins the moment the MultiVOIP GSM gateway
registers with the SIP proxy server and ends at the time specified by the user in
the Re-Registration Time field (this field). When/if registration lapses, call traffic
routed to/from the MultiVOIP GSM through the SIP proxy server will cease.
However, calls in progress will continue to function until they end.
Proxy Polling
Interval
60 - 300 The interval between the VOIP gateway’s successive attempts to connect to and
be governed by a higher level SIP proxy server. The Primary Proxy is the highest
level gatekeeper. Alternate Proxy 1 is second; Alternate Proxy 2 is the lowest
order SIP proxy server.
TTL Value SIP proxy
“Time to
Live”
value.
(in
seconds)
As soon as a MultiVOIP GSM gateway registers with a SIP proxy server (allowing
the proxy server to control its call traffic) a countdown timer begins. The TTL
Value is the interval of the countdown timer. Before the TTL countdown expires,
the MultiVOIP GSM gateway needs to register with the gatekeeper in order to
maintain the connection. If the MultiVOIP GSM does not register before the TTL
interval expires, the MultiVOIP GSM gateway’s registration with the proxy server
will expire and the proxy server will no longer permit call traffic to or from that
gateway. Calls in progress will continue to function even if the gateway becomes
de-registered.