The ISDN User Part (ISUP) enabler provides the signaling backbone between switching
elements for basic and supplementary services for the call establishment, supervision,
and release of circuit switched network connections for telecommunications services.
ISUP supports analog and digital circuits, as well as call management signaling
for data transmission. The ISUP software supports ITU-T, ETSI, ANSI, TTC, NTT, Chinese
and many other national variants of the protocol, enabling Signalware®
based applications to be widely deployed.
Functions:
The ISUP software provides the means to:
- Establish, maintain, and release calls and connections
- Supervise and manage the circuit infrastructure
ISUP controls the circuits used to carry either voice or data traffic. In addition,
the state of circuits can be verified and managed using ISUP. The management of
the circuit infrastructure can occur both at the individual circuit level and for
groups of circuits.
Services:
Services that can be defined using ISUP include:
- Switching (e.g. Softswitch)
- Voice Mail
- Internet Offload
ISUP is ideal for applications such as switching and voice mail in which calls are
routed between endpoints.
When used in conjunction with TCAP and SIGTRAN, ISUP becomes an enabler for Internet
offload solutions in which Internet sessions of relatively long duration can be
isolated from relatively brief phone conversations.
Features:
Ulticom®'s Signalware® ISUP software provides the ability for a customer
to define, in configuration files, the ISUP messages and parameters, not implemented
by their call control application. This enables ISUP applications that have been
developed as per the ITU standards to be easily adapted to support any number of
ITU country variants. The configuration files contain the messages, parameters,
and the expected action to be taken when Signalware processes the messages, parameters
or redefines the parameter IDs. Signalware® also enables greater application
flexibility by providing both stateful and stateless processing of messages.
The ISUP software is supported both on Signalware SS7 and Signalware SIGTRAN.
The ISUP software supports the development of distributed applications in a primary/standby
mode of operation. The Signalware library supports application registration and
restart as well as failover of an application to a standby process on a second computing
element within the Signalware cluster.
The ISUP software supports the following standards:
- ANSI - T1.113.1 to T1.113.4
- GR-246, Telcordia ISUP (T1.113.1 to T1.113.4)
- ITU - Q.761, Q.762, Q.763 and Q.764
- TTC - JT-Q762
- TTC - JT-Q763
- TTC - JT-Q764
- ETSI - EN 300 356-1
- Appendix 4 ISUP Specifications (Inter-network) NTT Articles of Agreement Concerning
Interconnection
- Appendix 4.1 ISUP Specifications Network Signalling Part (Intra-Network), NTT Articles
of Agreement Concerning Interconnection
- Common Channel Signaling (CCS) System Integrated Services User Part,
EG.s3.003, Version 4.0
August, 1991 (Telefonica - Spain)
- Czech and Slovak ISUP,
MTP/ISUP CS v1
May 1995
- Network Connection Reference CR14,
Hong Kong Telecom, Issue 1
June 1992
- Nationale Feinspecifikation Signalisierung (F.1) Paket 4,
Version 4 (D1 ISUP)
- PCN to Singapore ISUP Interworking at the Point of Interconnection,
Issue: Auto 1
December 1994
- SS#7 (Israel) - ISUP,
E0044
December 1993
- UAE ISUP
June 1990
Interconnect User Part (IUP) supports
the following standards:
- PNO-ISC-004, October 1996
PNO-ISC-006, February 1996