Cordless Telephony and Low-Tier PCS

1. Cordless Telephony and Low-Tier
PCS

2. Cordless Telephony and Low-Tier PCS
• This section introduces two cordless telephony technologies,
– CT2 and
– DECT,
• and two low-tier PCS technologies
– PHS and
– PACS.

3. • CT2 was developed in Europe, and has been available since
1989.
• CT2 is allocated 40 FDMA channels with a 32-Kbps speech
coding rate.
• For a user, both base-to-handset signals and handset-to-base
signals are transmitted in the same frequency. This duplexing
mode is referred to as time division duplexing (TDD).
• The maximum transmit power of a CT2 handset is 10mW.

4. • In the call setup procedure, CT2 moves a call path from one
radio channel to another after three seconds of handshake
failure.
• CT2 also supports data transmission rates of up to 2.4Kbps
through the speech codec and up to 4.8Kbps with an increased
error rate.
• CT2 does not support handoff.
• Incoming calls have been supported in an enhanced version of
CT2, but its efficiency has not been proven.