Pstn-To-Sip Interworking - 3Com VCX V7122 User Manual

TP-1610/H.323 hot-swap cPCI board.
Optional dual redundant AC or a single DC power supply.

PSTN-to-SIP Interworking

The VCX V7122 gateway performs interworking between ISDN and CAS via E1/T1/J1 digital
spans and SIP IETF signaling protocol. 16 E1, T1 or J1 spans are supported (480 channels)
in a two modules gateway.
The VCX V7122 gateway supports various ISDN PRI protocols such as EuroISDN, North
American NI2, Lucent 5ESS, Nortel DMS100, Meridian 1 DMS100, Japan J1, as well as
QSIG (basic call). PRI support includes User Termination or Network Termination side.
ISDN-PRI protocols can be defined on an E1/T1 basis (i.e., different variants of PRI are
allowed on different E1/T1 spans).
In addition, it supports numerous variants of CAS protocols for E1 and T1 spans, including
MFC R2, E&M wink start, E&M immediate start, E&M delay dial/start, loop-start, and ground
start. CAS protocols can be defined on an E1/T1 basis (i.e., different variants of CAS are
allowed on different E1/T1 spans).
PSTN to SIP and SIP to PSTN Called number can be optionally modified according to rules
that are defined in gateway ini file.
Supported Interworking Features
Definition and use of Trunk Groups for routing IP PSTN calls.
B-channel negotiation for PRI spans.
ISDN Non Facility Associated Signaling (NFAS).
Supports SIP2QSIG IETF draft-ietf-sipping-qsig2sip-04.txt, including interworking
between 180/183 responses with Session Description Protocol (SDP) and Q.931
Progress message.
PRI to SIP Interworking of Q.931 Display (Calling name) information element.
PRI (NI-2) to SIP interworking of Calling Name using Facility IE in Setup and Facility
messages.
Configuration of Numbering Plan and Type for IP ISDN calls.
Interworking of PSTN to SIP release causes.
Interworking of ISDN redirect number to SIP diversion header (according to IETF draft-
levy-sip-diversion-05.txt).
Optional change of redirect number to called number for ISDN
Interworking of ISDN calling line Presentation & Screening indicators using RPID header
<draft-ietf-sip-privacy-04.txt>.
Interworking of Q.931 Called and Calling Number Type and Number Plan values using
the RPID header.
Supports ISDN en-block or overlap dialing for incoming Tel IP calls.
Supports routing of IP Tel calls to predefined trunk groups.
Supports a configurable channel select mode per trunk group.
Supports various number manipulation rules for IP Tel and Tel IP, called and calling
numbers.
16 3Com VCX V7122 SIP VoIP Gateway User Manual
IP calls.