User guide

Chapter 4: Configuring Your MultiVOIP GSM
Multi-Tech Systems, Inc. MVPGSM 46
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 checkbox Allows the MultiVOIP GSM to work in conjunction with a proxy server.
Allow Incoming
Calls Through SIP
Proxy Only
checkbox When selected, incoming calls are accepted only if those calls come through the
proxy.
Proxy Parameters
Primary Proxy n.n.n.n Network address of the preferred SIP proxy server for controlling the traffic of
the current VOIP.
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.
Survivable Server
(Self)
n.n.n.n This will display the IP address of the SIP Survivable server.
Append SIP Proxy
Domain Name in
User ID
checkbox 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.
Monitoring Parameters
Polling Method Register
-or-
Options
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 reconfirm the availability of the proxy
server with which it is currently registered to. This is required, as typically the re-
registration time will be on an hourly basis. Whereas to reduce the call failure
rates, periodically (based on the configured TTL value), the MVPGSM has to
confirm the availability of the proxy server with which it is registered to. If the
proxy server is not available, the MultiVOIP GSM gateway will switch over to the
next level of the proxy server.
Proxy Polling
Interval
60 - 300 The interval between the VOIP SIP server’s successive attempts to connect to and
be governed by a higher level SIP proxy server. The Primary Proxy is the highest
level SIP server. Alternate Proxy 1 is second; Alternate Proxy 2 is the lowest order
SIP proxy server.
SIP Call Signaling Parameters continued below…