Geneva– The ITU agreed on three important new standards for voiceband modems in Edinburgh, Scotland, last week, at a meeting of the ITU-T Working Party 1/16
responsible for modem specifications.
Building on the success of the now ubiquitous V.90 Recommendation for modems at data rates up to 56kbit/s, important enhancements have now been agreed in new
Recommendation ITUT-T V.92. The enhancements are:
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an increase of more than 40% in the maximum data rate towards the network to a new maximum of 48
kbit/s on the best connections;
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significantly quicker start-up times on recognized connections, and;
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the ability to put the modem ‘on-hold’ when the network indicates that an incoming call is waiting.
These enhancements will give significant benefits to the modem user with improved access to interactive services, and the option of exploiting voice response
facilities associated with Internet browsing.
The Chairman of ITU-T Study Group 16, Mr Pierre-André Probst noted "These important new features will further improve the Internet users experience by significantly
reducing connect times and providing improved access to new Internet services."
The meeting, jointly hosted by industry leaders 3Com, Conexant Systems, Lucent Technologies and Motorola, also initiated approval of a new Recommendation on data
compression techniques in V.44, and a Recommendation V.59 which defines new procedures for facilitating modem and connection fault-finding.
The new data compression Recommendation is based on the LZJH compression algorithm developed by US-based Hughes Network Systems and gives an improvement in
compression of more than 25% beyond the existing Recommendation V.42bis, and a data compression ratio in the region of 6:1 for a typical Web browsing connection.
The net result is data throughput rates in excess of 300 kbit/s compared with typical values of 150–200
kbit/s today, thus significantly reducing download times and
speeding up web browsing. These rates are still below those available from emerging DSL technologies, but have the advantage of not requiring any special installation
on the part of the network provider, leaving upgrades to the direct control of ISPs and users.
“Much attention is going to DSL technologies these days, but the voiceband modem will remain the pre-dominant worldwide access technology for many years to come
and these important new Recommendations will help users to get the most from this technology” said John
Magill, the Chairman of the ITU-T Working Party 1/16.
For further information, please contact:
Mr John Magill
Tel: +44 1666 51 01 05
Fax: +44 1666 51 01 49
E-mail: johnmagill@probecom.co.uk |
Mr. Fabio Bigi
Deputy Director, ITU Telecommunication
Standardization Bureau
Tel: +41 22 730 5860
Fax: +41 22 730 5853
Email: fabio.bigi@itu.int |
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