Multi-Tech Systems MVP210-SS - Manual (Page 13)

MultiVOIP User Guide Overview
13
Capacity. MultiVOIP model MVP810SS is an eight-channel unit, the
model MVP410SS is a four-channel unit, and the MVP210SS is a two-
channel unit. All three of these MultiVOIP units have a 10/100Mbps
Ethernet interface and a command port for configuration.
SIP Survivability. The MVP210SS, MVP410SS and MVP810SS have a
special capacity that reaches beyond ordinary voip functionality: they
can direct call traffic for phones connected to their channels or phones
connected to channels of other SIP gateways in the network (this is
basic SIP server functionality). The MVP-SS unit would normally be
located at a remote branch office served by a central SIP server (PBX) at
the organization’s main office. The MVP-SS is intended as a backup in
case the network’s main SIP server (often a PBX) fails or loses contact
with the group of gateways at the remote branch office. If the main SIP
server fails, the MVP-SS allows branch office phone users to call each
other and access the PSTN via POTS lines or a key telephone system.
Internet
Main Office
Branch Office
Central SIP Server
(Main PBX)
Router
PSTN
Router
LAN
SIP Phone 1
SIP Phone 2
SIP Phone 3
Ordinary
SIP
Gateway
PSTN
SIP Survivability
Server &
Gateway
POTS
or KTS
Figure 1-3: SIP Survivability MultiVOIP in system
A single MVP210SS, MVP410SS or MVP810SS can provide SIP server
functionality for as many as 500 other voip gateways. However, the
number of phone lines that these units support (4 for the MVP410SS; 8