Profile, Operation & Configuration; General; Pstn-To-Sip Interworking; Supported Sip Features - AudioCodes Mediant 2000 User Manual

Mediant 2000/SIP User's Manual
4 Profile, Operation & Configuration
4.1

General

The Mediant 2000/SIP Gateway performs interworking between ISDN and CAS via E1/T1/J1
digital spans and SIP IETF signaling protocol. In the current release, up to 16 E1, T1 or J1 spans
are supported (up to 480 channels).
4.1.1

PSTN-to-SIP Interworking

The Mediant 2000/SIP Gateway supports various ISDN PRI protocols such as EuroISDN, North
American NI2, Lucent 5ESS, Nortel 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
MFCR2, E&M wink start, E&M immediate start, E&M delay dial/start, loop-start, and ground start.
Different CAS protocol can be defined for each E1/T1 (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 which
are defined in the ini file.
The following features are supported:
•
Definition and using of Trunk Groups for routing IP! PSTN calls.
•
B-channel negotiation for PRI spans.
•
ISDN Non Facility Associated Signaling (NFAS).
•
PRI to SIP Interworking of Q.931 Display (Calling Name) information element. (Supported
only for EuroISDN, NT!TE calls).
•
Configuration of Numbering Plan and Type for IP! ISDN calls
•
Interworking of PSTN to SIP release causes
•
Interworking of ISDN to diversion number (defined in IETF draft-levy-sip-diversion-05.txt)
4.1.2

Supported SIP Features

The Mediant 2000/SIP main features are:
•
Works with Proxy or without Proxy, using an internal routing table.
•
Fallback to internal routing table if communication with the Proxy server fails
•
Supports two redundant Proxy servers. If main Proxy fails, the MP-1xx automatically switches
to the first redundant Proxy.
•
Proxy Registration, such as:
REGISTER sip:proxyname SIP/2.0
VIA: SIP/2.0/UDP 212.179.22.229;branch=z9hG4bRaC7AU234
From: <sip:Username@sipgatewayname>;tag=1c29347
To: <sip:Username@sipgatewayname>
Call-ID: 10453@212.179.22.229
Seq: 1 REGISTER
Expires: 3600
Contact: sip:Username@212.179.22.229
Content-Length: 0
Version 4.2 Beta
4. SIP Operation & Configuration
39 June 2003