3Com V6100, User Manual Manual, Page: 19 / 496

V6100 and V7122 User Guide
19
C
HAPTER
1: O
VERVIEW
This document provides you with the information on installation, configuration and operation
of the V7122 SIP gateway, digital V6100 SIP gateway, TP-1610 SIP cPCI board and TP-260
SIP PCI board. As these products have similar functionality (with the exception of their
physical layout and the number of trunks), they are collectively referred to in the guide
(except for in hardware-related sections) as the V7122.
V7122 Overview
The V7122 SIP Voice over IP (VoIP) gateway enables voice, fax, and data traffic to be sent
over the same IP network. The V7122 provides excellent voice quality and optimized packet
voice streaming over IP networks.
The V7122 uses the award-winning, field-proven Digital Signal Processing (DSP) voice
compression technology used in other TrunkPack
TM
series products.
The V7122 incorporates 1, 2, 4, 8 or 16 E1 or T1 spans for connection, directly to Public
Switched Telephone Network (PSTN) / Private Branch Exchange (PBX) telephony trunks,
and includes one or two 10/100 Base-TX Ethernet ports for connection to the network.
The V7122 supports up to 480 simultaneous VoIP or Fax over IP (FoIP) calls, supporting
various Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) protocols
such as EuroISDN, North American NI2, Lucent™ 4/5ESS, Nortel
™
DMS100 and others. In
addition, it supports different variants of Channel Associated Signaling (CAS) protocols for
E1 and T1 spans, including MFC R2, E&M immediate start, E&M delay dial/start, loop start
and ground start.
The V7122 gateway, best suited for large and medium-sized VoIP applications, is a compact
device, comprising a 19-inch 1U chassis with optional dual AC or single DC power supplies.
The deployment architecture can include several V7122 gateways in branch or departmental
offices, connected to local PBXs. Call routing is performed by the gateways themselves or by
SIP Proxy(s).
The V7122 gateway enables users to make low cost long distance or international
telephone/fax calls between distributed company offices, using their existing telephones/fax.
These calls are routed over the existing network ensuring that voice traffic uses minimum
bandwidth.