Data Communication Between Tel And Ksu (I) - Panasonic Easa-Phone VA-208 Installation Manual

9. Data Communication between TEL and KSU (1)
Circuit
3
(
H
L
rlloo
T --_
TEL
No. 1
* 12v
RI03
+ Cl02
9.1
(11
(2)
9.2
Dato
Communication
6J.J
I
HBl (HB2006) Circuit
+ c4
RI7 RI9
LT
05 -14
RI6
015
016
D3
R21
R22
R20
I
+ c5
R23 R25
07 -17
R24
016
019
D4 R26
R27
R26
Supply of the control current to H, L terminal.
(For data communication and power supply
source
to the TEL).
+lZV is supplied to H,L terminal via CHIOI choke coil, and supplied DC voltage is superpaused to communica-
tion data between TEL and KSU.
Output the data from KSU to TEL.
The data from HBI (pin No. 10) is output to pin No. 3, and output is to H, L terminal via TIOI (pin No. 9, 10 to
No. 7, 6).
Data input from TEL to KSU.
The input data from TEL is induced to TIOI (pin No.7, 6 to No.4, 2) via CIOI, and input it to HBI STAT (pin
No.~), then output it from HBI (pin No. 11).
DC power supply to the speech path.(To the T,R terminal)
DC power supply to the speech path is supplied to TEL speech circuit. The supply process for +12V
is for
positive side via R 103, QIOI and for negative side via 0102, R 104.
The function of R103, 0101, Q102 and RI04 operates as coil, and the voice signal and other tone signals is
induced to T102 and supply to the speech path.