Bell System Practices 851 Identification, Installation, Connections, And Maintenance page 17

ISS 8, SECTION S03-601-101
TABLE B
CONNECTIONS FOR KTS AND/OR STATION BUSY LAMP (See Note)
WIRE OR LEAD
STATION
BUSY LAMP
LINE SWITCH HOLD KEY
STRAP OR MTG CD CON DR
y
BR G 0-BK BK-BL V-S G-V
Y-BR
With- 1A 11
•
3 9 13
•
3 L2t
out
1A1-1A2
4 3 13 3 9 3 13 L2t
1A 11
L2t 3
9 13
L2t
3 L2t
With
1A1-1A2
4 L2t 13 3 9 L2t 13 L2t
Note: Use B battery supply from KTS if available. Do not use 10 volt ac lamp battery.
Insulate and store.
t
Network terminal, undesignated terminals are on terminal board.
TABLE C
PICKUP-SIGNAL KEY CONVERSIONS
TEL KEY
KEY LEAD
SET OPTION
0-W S-W G-R BL-BK BR -BK
HPPPPP
9 9
9 9 9
HPPPPS
9 9 9 9 11
851-or
HPPPSS
9 9 9 11 11
2851-Type
HPPSSS
9 9 11
11 11
HPSSSS 9 11 11 11 11
HPPP*P*S*
9 9 6 6 3
HPP*P*P*S* 9 6 6 6 3
* For common signaling with intercommunicating or private lines with
signaling under line switch controL For 1A KTS, move (Y) line switch
lead from terminal 4 to 11.
533K
BUSY LAMP
DIODE
L2t~3
Page 17