KX-TCA285RU - Panasonic Telephone Service Manual (repair manual). Page 13

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Technical Description for BT unit

1. WHEN IP DATA FOR INCOMING SIGNAL ENTERS FROM IP LINE

a.  If KX-TCA285 doesn’t have the registered Bluetooth (BT) Headset, the BT module(IC601) doesn’t work and the BT Head-

set function can’t use.

b. If KX-TCA285 has the registered Bluetooth Headset,

IC100 (BBIC) inform “incoming call” data to the BT Module by serial Communication (RF/IF)
The BT module inform “incoming call” data to the BT Headset by radio transmission.
It is as follows and, specifically, the BT Module generates the radio transmission data and the is radiated.

c. BT Headset detected “incoming call Data”.

BT Headset tells the operator having received a message in “Incoming call”.

2. WHEN A CALLING IS MADE BY THE BLUETOOTH(BT) HEADSET

a. When the operator of BT Headset switches STANDBY to TALK,

TALK mode data enters KX-TCA285 and it is demodulated at the BT module of KX-TCA285.

b. Voice signal is connected between IC100(BBIC) and BT module in a PCM Format.

The item of the following explains the operation of transmission and receiver.

3. BT MODULE UNIT RECEIVER OPERATION

BT RF signal is received by a single pattern antenna.

4. BT MODULE UNIT TRANSMISSION OPERATION

 BT RF signal is transmitted by a single pattern antenna.

Rx_Data

Rx_RF

Tx_Data

Tx_RF

GND

BT3.0V

C601

BT3.0V

R602

GND

R603

R605

R606

R607

BT3.0V

GND

Q601

Q602

ANT_BT

1

2

GND

SPI_MOSI

SPI_CSB

SPI_MISO

SPI_CLK

GND

L41

L601

IC601

14

RESETB

19

RF

20

GND8

21

GND9

22

GND10

23

GND11

29 USB_D+
30 USB_D-
31 PCM_IN
32 PCM_CLK

4

GND2

5

CTS

6

RX

7

GND3

11

SPI_CSB

12

SPI_MISO

13

SPI_CLK

16

GND5

17

GND6

18

GND7

26 GND12
27 VCC
28 GND13

1

GND1

2

PCM_SYNC

3

PCM_OUT

8

RTS

9

TX

10

SPI_MOSI

15

GND4

25 PIO2

24 PIO1

GAP

BT_ANT

Bluetooth Unit