Panasonic KX-TG454SK Service Manual - 4.2.

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KX-TGE240/242/243/244/245/260/262/263/264/270/272/273/274/275/TG454/TG465/TGEA20/TGA20

4.2.

US-DECT Description

The frequency range of 1.92 GHz-1.93 GHz is used. Transmitting and receiving carrier between base unit and handset is same

frequency. Refer to Frequency Table (P.63). 

4.2.1.

TDD Frame Format

4.2.2.

TDMA system

This system is the cycles of 10 ms, and has 6 duplex paths, but maximum duplex communication path is 5 because of dummy

bearer use.

In 1 slot 417 

s, the 10 ms of voice data is transmitted.

• 2 - Handsets Link

Traffic Bearer

A link is established between base unit and handset.

The state where duplex communication is performed.

Handset doesn't make up duplex in no free RF channels because of interference. (*1)

Dummy Bearer

Base unit sends Dummy-data to the all stand-by state handsets.

Handsets receive that data for synchronization and monitoring request from the base unit.

Base unit doesn't send Dummy bearer in no free RF channels because of interference. (*1)

Note:

(*1) It is a feature under FCC 15 regulation and for interference avoidance.

In the case of checking RF parts, it is better in least interference condition.

417 

μs (available) 417 μs (blind)

5 ms

5 ms

Up Link ( Handset -> Base Unit )

Down Link ( Base Unit -> Handset )

DATA rate : 1.152 Mbps

RX1

RX2

RX3

RX4

RX5

RX6

TX1

TX2

TX3

TX4

TX5

TX6

RX1 RX2 RX3 RX4 RX5 RX6 TX1 TX2 TX3 TX4 TX5 TX6

TX

RX

RX

TX

Traffic Bearer

Dummy bearer

Base unit

Handset 1

(Stand by)

Handset 2

(Link)

Handset 3

(Link)