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V7122 GatewayUser Guide
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
Æ
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
Æ
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
Æ
IP calls.
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
Æ
ISDN calls.
Supports ISDN en-block or overlap dialing for incoming Tel
Æ
IP calls.
Supports a digit map pattern to reduce the dialing period when Overlap dialing is used.
Summary of Contents for VCX V7122
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