Panasonic KX-F1200 Service Manual And Technical Manual page 127

KX-F 1200
__Port Ol
Operation _ BREAK L1
Wait Condition 1
1 1
BellInput 2 --
FAX Transmit 1 0
2
1 0
Receive 2 --
Pulse Dial 1 0/1
2
1 0
CPC Input 2 --
Parallel TEL
Off-Hook During 1 0
Line Hold or TAM 2 --
Answering
Parallel TEL
Off-Hook During 1 1
On-Hook 2 --
Conference
Control Mode for NCU Section Table
Control Intput to NCU
Q4 IC7 RLY3
I
BELL
BREAK L2 A B CONF RLY1 L1 1_2
1 -- -- 0 -- --
-- 1/0 --
1 -- -- 0 -- -- 1/0
-- 0 1 0 -- --
0 1 1
-- 0 0
0 1 0 0 -- --
-- -- 0 --
0/1
Control Output from NCU
CPC
L1 1_2 L1
DCN
L2
-- -- 0 --
0
-- -- 0 --
0
-- -- 1 0
0
I -- I I
-- I --
0-,I
1: High Level(5V) 0: Low Level (0V)
6-8. CONFERENCE
When using handset or speaker-phone, conference (tripartite conference) is possible.
Turning RLY3 ON sets up the signal circuit, and it is valid tripartite conference among KX-F1200, Line1 and Line2.
The larger loss makes the lower sound between Line1 and Line2.
Total Loss=LossA+LossB+LossC (about 5dB)
Block Diagram
Handset _ RX
Spe°rkerph°ne _. TX _____
T1
PLY 3
I
c I
I
I
L
Line 1
Loss A I
Line 2
Loss B
TEL 1
TEL 2
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