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

PSTN-to-SIP Interworking Features

The gateway performs interworking between ISDN and CAS using 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 gateway supports various ISDN PRI protocols such as EuroISDN, North American NI2,
Lucent 4/5ESS, Meridian 1 DMS100, Japan J1, as well as QSIG. PRI support includes User
Termination or Network Termination side. ISDN-PRI protocols can be defined on an E1/T1
basis (that is, 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 (that is, 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.
The supported internetworking features include the following:
Definition and use of Trunk Groups for routing IP PSTN calls.
B-channel negotiation for PRI spans.
ISDN Non Facility Associated Signaling (NFAS).
PRI to SIP interworking according to <draft-ietf-sipping-qsig2sip-04.txt>.
PRI to SIP Interworking of Q.931 Display (Calling name) information element.
PRI (NI-2, 5ESS) 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 and flexible mapping 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.
Interworking of Calling and Called Subaddress values for SIP ISDN calls.
Supports ISDN en-block or overlap dialing for incoming Tel IP calls.
Supports a digit map pattern to reduce the dialing period when Overlap dialing is used.
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IP calls.
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