Specifications

Product Description

IP Office Release 7.0

Page 253

Issue 22.a.- (21 March 2011)

E1R2 Channel Associated Signaling

Provided by the IP400 PRI E1R2 and IP500 Universal PRI cards.

The IP400 PRI E1R2 cards are available in two versions supporting either RJ45 or coax network connections.

Each card provides channels that can be configured for MFC, Pulse or DTMF dialing dependent on the

requirements of the network.

Session Initiation Protocol (SIP)

IP Office supports SIP trunking. SIP trunks allow IP Office users to take advantage of new telephony services

being offered by ‘Internet Telephony Service Providers (ITSPs)’. In many cases, these telephony services can

offer substantial savings in comparison to traditional exchange lines. The IP Office solution allows all users,

regardless of their phone type, to make and receive SIP calls. SIP trunks are handled like any other line on IP

Office, affording all the call routing and toll control needed to manage inbound and outbound calls.

SIP trunks on IP Office require the provisioning of voice compression channels through the installation of VCM

modules within the control unit. RTP Relay is also supported to allow the IP stream through SIP after call setup.

A license for the maximum required number of simultaneous SIP calls is also needed. Up to 128 simultaneous

calls are supported.

IP Office also supports the T38 protocol which allows Fax over IP.

There are several possible network topologies for SIP trunk systems, as shown in the following diagrams.

Option 1: Service provider with a Session Border Controller (SBC), which solves NAT traversal issues – this is

the most reliable and preferred method.