Chapter 4: Profile , Operation , And Configuration; General; Pstn-To-Sip Interworking - 3Com VCX V7122 SIP User Manual

C 4: P
HAPTER
C
ONFIGURATION

General

The VCX V7122/SIP Gateway performs interworking between ISDN and CAS using
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).

PSTN-to-SIP Interworking

The VCX V7122/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 (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
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 (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
which are defined in the INI file.
The following features are supported:
Definition and using of Trunk Groups for routing IP
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
Interworking of PSTN to SIP release causes
Interworking of ISDN to diversion number (defined in IETF draft-levy-sip-diversion-05.txt)
3Com VCX V7122/SIP VoIP Gateway User Manual
, O
ROFILE PERATION
ISDN calls
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AND
PSTN calls
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