CAT-iq

CAT -iq ( Cordless Advanced Technology - internet and quality, German: " Cordless advanced Technology - Internet and Quality" ) is a standard for DECT telephony. The idea of ​​CAT -iq took place at the exhibition ITU Telecom World 2006 on 5 December 2006 in Hong Kong.

Basic Features

With CAT -iq standard phone applications can be linked to IP networks. This opens up new applications such as Internet radio and RSS feeds to be used in cordless phones.

With CAT -iq a higher data rate of up to 384 kbit / s between base station and handset is specified. This is achieved with so-called "long slot formats " within the previous DECT frequency band 1880-1900 MHz and 1910-1920 MHz, which is available almost worldwide and is not disturbed by other wireless technologies such as Bluetooth or Wi-Fi. Simultaneously, the speech quality is improved by a higher bandwidth, and new speech codec. To the use of G.722 wideband speech codec of the voice mapping is S and thereby reproduce signals up to 7000 Hz with a data rate of 64 kbit / s. Since the codec is not limited to Cat -iq, there is no signal conversion a fundamental compatibility between all devices that support the voice codec that is currently mainly in the field of ISDN and IP telephony. Another advantage of CAT -iq is the guaranteed compatibility of equipment from different manufacturers. In previous DECT standard, this is not regulated in detail and is solved by the manufacturers often proprietary. The planned at CAT -iq Adapted Power control technology offers opportunities to save energy.

Stages of development

  • CAT -iq 1.0 " HD Sound": ETSI TS 102527-1 Broadband voice transmission
  • CAT -iq 2.0 "Multi Line": ETSI TS 102527-3 Advanced services for wideband speech signal
  • CAT -iq 3.0 " Internet Ready": ETSI TS 102527-4, Lite ' Data Services ( basic data services); Software Update Over The Air ( SUOTA ) ( Wireless software update via HTTP -based download programs )

Safety deficiencies

The Federal Office for Security in Information Technology complains that additional interfaces and functions are implemented compared to traditional DECT ( 64 -bit encryption ), without increasing the safety, and writes as follows: " This results in comparison with DECT in a lower level of security. At this point, improving the safety of CAT -iq by the DECT Forum is required " An increase in security is planned with the future CAT-iq standard version 2.1, type and scope but have so far (as of January 2013). Not be published.

Bandwidth (signal processing)
169502
de