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There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper
(Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the manufacturer’s
specific instructions for the melting points of their products and any precautions for using their product with other materials. The
following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3 mm, 0.6 mm and 1.0 mm. 

When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.

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• Design and specifications are subject to change without notice.

• Operation range: Up to 300 m outdoors, Up to 50 m indoors, depending on the condition.
• Analog telephone connection: Telephone Line

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A

B

  J 1 

H o o k 

S w i t c h 

A u d i o 

A n a l o g 

F r o n t 

E n d 

D S P 

R F 

C P U 

X T A L 

2 0 . 7 3 6 M H z 

A N T 1 

A N T 2 

B r i d g e 

R e c t 

D2

Q2/3

Q1

E E P R O M 

t o 

T e l _ L i n e 

t o   A C 

A d a p t o r 

C O S I C 

X1

C O S I C 

I / F 

C h a r g e + 

C h a r g e - 

3 . 3 V 

R e g u l a t o r 

2 . 6 V 

R e g u l a t o r 

3 . 3 V 

2 . 6 V 

B 1 3 

B 1 4 

B 2 3 

B 2 4 

B 3 8 

B 6 2 

B 6 7 

B 6 0 

B 6 1 

L i m i t 

resistor

S C L 

D A T 

B 8 2 

B 8 1 

2 . 6 V 

KX-TG1311/1312 BLOCK DIAGRAM (BASE UNIT)

R39

C26, R33, R200, C27, R34, R201

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Base Unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.7).

• DECT BBIC (Base Band IC): IC3 (career module)

- Handling all the audio, signal and data processing needed in a DECT base unit
- Controlling the DECT specific physical layer and radio section (Burst Module Controller section)
- ADPCM codec filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
- DTMF receiver (DSP section)
- Clock Generation for RF Module
- ADC, DAC, timer, and power control circuitry
- All interfaces (ex: RF module, EEPROM, LED, Analog Front End, etc.)
- PLL Oscillator
- Detector
- Compress/Expander
- First/Second Mixer
- Amplifier for transmission and reception

• EEPROM: IC1

- Temporary operating parameters (for RF, etc.)

• Additionally,

- Power Supply Circuit (+3.3V, +2.6V output)
- Crystal Circuit (20.736MHz)
- Charge Circuit
- Telephone Line Interface Circuit

The power is supplied to the DECT BBIC, RF Module, EEPROM, Relay Coil, LED and Charge Contact from AC Adaptor as
shown in Fig.101. The power supply is as follows: