Multitech MultiVOIP MVP210 - Page 62

Chapter 4 – Configuring Your MultiVOIP
62 MultiVOIP® Voice/Fax over IP Gateways
Configuring SIP Server
The MultiVOIP 210/410/810-SS models have the additional capability of SIP survivability. This section describes
the settings for SIP server mode.
SIP Server Confi
g
uration Parameter Definitions
Field Name Values Descri
p
tion
Operating Mode Survivability
-or-
stand-alone
In “Survivability” mode, the MVP-SS unit can function as a SIP server for other gateways in its
network in case that network loses contact with the network’s main SIP server (typically a
PBX). When in “Survivability” mode the unit is a backup SIP server.
In “Stand-Alone” mode, the MVP-SS functions as a primary SIP server for other gateways. In
this mode, the MVP-SS operate to technical advantage with ‘smart’ SIP phones. Such smart SIP
phones can choose the SIP server under which they operate and, consequently, can be
controlled by either the SIP-based PBX or by the MVP-SS
Survivability Status
Check
Register,
Options
One of two status-check packets is sent to the main SIP Proxy servers to which the MVP-SS
serves as a backup. This packet determines if the MVP-SS takes over SIP server functions or
stays in normal backup mode. “Options” and “Register” are two SIP request “methods.” The
Options method solicits information but does not set up a connection. The Register method
conveys information about a user’s location to the SIP server. The “Register” method may
entail more data overhead than the “Options” method. If your SIP server supports these
methods, you can use either one. If only one is supported, use the supported method.
Re
g
istrar O
p
tions
Allow Undefined
Registrations
Y/N If undefined registrations are allowed, then gateways other than those listed in the
Predefined Endpoints list can register with the MVP-SS unit as it functions in its SIP server
mode. If undefined registrations are not allowed, then incoming registrations are allowed if
they originate from endpoints at accepted domains or IP addresses.
Accept Registrations
for:
any/specific
domains
Defines if registrations to the MVP-SS SIP server are accepted from any domain or only from
specified domains. Multiple domains can be listed, separated by semicolons. The “any
domains” option is intended for private networks not accessible via Internet.
Domain Names name Endpoints (separated by semicolon) from which the MVP-SS accepts registrations.
Accept Registrations
for:
n.n.n.n
-or-
any IP
addresses
Determines if registrations to the MVP-SS SIP server are accepted from any IP address or only
from specified IP addresses. Multiple IP addresses can be listed (separated by semicolon). The
“any IP addresses” option is intended for private networks not accessible via Internet or PSTN.
IP Addresses n.n.n.n List of IP addresses (separated by semicolon) of endpoints from which the MVP-SS accepts
registrations.
Re-Registration
Time
in seconds;
(default is
3600)
The time after which the UserAgent Client registers with the proxy server. Expired registration
indicates the gateway lost contact with the main SIP server and that the MVP-SS unit enters
‘survivability’ mode. In this mode, the MVP-SS unit completes calls acting as a backup to the
main SIP server. Normally, the MVP-SS initiates re-registration before the interval lapses.