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Cordless Telephony¶
Over the years several standards for cordless telephones have come and gone:
| Name | Year | Frequencies | Info |
| CT0 | N/A | N/A | Retronym for non-standardized earlier versions |
| CT1 | 1984 | 40 ch @25kHz UL 914–915 MHz DL 959–960 MHz overlaps GSM channels 120-124 |
Analog CEPT standard, specified in CEPT Recommendation-TR-24-03.PDF and I-ETS 300 235 . The former is the original standard from 1983, the latter is an updated version from ETSI released in 1994 which contains some updates. Operation no longer allowed since 1998 in Germany / 2005 in Austria |
| CT1+ | 80 ch @25kHz UL 885–887 MHz DL 930–932 MHz |
Used in Belgium, Germany, Luxembourg and Switzerland Operation no longer allowed since 2008 in Germany |
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| CT2 | 1985 | 864–868 MHz | British standard MPT1375, later adopted by other countries Operation no longer allowed since 2008 in Germany |
| CT3 | Only available as prototype, first presented at a CEPT conference in Lund, 1987. Became the basis for DECT. (source: DECT Today, May 2016) | ||
| DECT | 1992 | 10 ch @1728 kHz * 24 timeslots 1880–1900 MHz 1900–1980 MHz optional 2010–2025 MHz optional 2400–2480 MHz optional 1920–1930 MHz USA |
Originally Digital European Cordless Telephony, later Digital Enhanced Cordless Telecommunications Digital standard using G.726 as voice CODEC DECT only defines the radio interface. Later DECT-GAP (Generic Access Profile) specified basic functions (call setup / tear-down) ensuring interoperability between vendors |
| CAT-iq | 2006 | see DECT | Cordless Advanced Technology – internet and quality Superset of DECT ensuring more interoperability and adding G.722 as mandatory voice CODEC |
Updated by eloy 25 days ago · 10 revisions
