TC32 - Communication, networks and systems
Overview of Work in TC32
TC32 and its Task Groups are currently undertaking the following
Private Integrated Services Networks (PISNs)
have formed the basis of voice communication in the enterprise
environment since the mid 1980s. Based on ISDN (Integrated Services
Digital Network) technology, a PISN provides circuit-switched
connectivity at rates based on 64 Kbit/s in support of voice,
fax, data, low-speed video, etc. A PISN comprises inter-connected
Private Integrated services Network eXchanges (PINXs) (e.g., PBXs).
Interconnection is achieved by various means such as leased lines
or via public ISDNs.
Work in TC32 has resulted in the publication of Ecma Standards
and Technical Reports and ongoing work on the following aspects
- scenarios for the interconnection of PINXs;
- numbering and addressing in PISNs;
- services in PISNs;
- inter-PINX signalling - "QSIG";
- signalling for PISN access - "SSIG".
TC32-TG14 has undertaken these topics.
Most of TC32 publications have been contributed to ISO/IEC JTC1
and have resulted in the publication of corresponding fully-aligned
International Standards by ISO and IEC and endorsing ENs or ETSs
In addition, TC32 has addressed Broadband (PISNs)
based on Asynchronous Transfer Mode (ATM). Ecma has published
Standards on services in B-PISNs and on inter-PINX signalling
Computer Supported Telecommunication Applications
is a standardized Computer-Telephony Integration (CTI) interface
that provides "third party" interactions between computer applications
and a telecommunication network (e.g., a PISN). "Third party"
means that the computer application is not constrained to act
on behalf of just a single telephone user. CSTA is specified in
a number of Ecma publications. The specification focuses on the
needs of private telephony networks but also takes into account
the requirements of other public and private networks.
The current "phase III" version of the specification was published
by ISO and IEC in July 2000. An XML version of the CSTA protocol
was published by Ecma in June 2001.
Ongoing work in TC32-TG11 includes
the use of CSTA with Voice over Internet Protocol (IP) (e.g. H.323
and SIP protocols) and the use of CSTA to support multimedia communications
(including email and chat).
IP-based multimedia communications in a business
TC32-TG17 was formed in mid-1999
and is focusing on the interoperation of PISNs and Internet Protocol
(IP) Networks for voice or multimedia communications, with emphasis
on the following aspects:
- interworking of PISNs and IP networks via a gateway, including
QSIG-H.323 and QSIG-SIP interworking
- connection of PISN components via IP network infrastructures
(i.e., QSIG tunnelling over TCP/IP, over H.323 or over SIP).
Already published are a Technical Report, TR/81, analyzing the
complex standards situation in this field, and five Ecma Standards
(ECMA-307, ECMA-308, ECMA-309, ECMA-326 and ECMA-332) specifying
supplementary service interworking between QSIG and H.323/H.450,
and a further Ecma Standard (ECMA-333) for tunneling QSIG over
H.323 networks. Work is in progress on further Standards for interworking
between QSIG and H.323/SIP. Investigations are continuing into
other aspects, including QSIG tunnelling over TCP/IP and SIP,
mobility, security and SIP supplementary services.
Near Field Communication
TC32-TG19 was established in August
2002 to standardise the Interface and Protocol for Wireless Proximity
Communication systems, the first Standard, ECMA-340
is titeled NFCIP-1.