AT&T 3B2/300 Technical Reference Manual page 705

- - - - - - - - - - - - - - - - A p p e n d i x : CONNECTOR AND CABLING INFORMATION
8-PIN AIC CARD CONS CONNECTOR,
J3
PIN DESCRIPTION FUNCTION
1 REQUEST TO SEND (RTS)
OUTPUT
2 GROUND GROUND
3
DATA CARRIER DETECT (DCD) OUTPUT
4
RECEIVE DATA (RXD) OUTPUT
5 DATA TERMINAL READY (DTR) INPUT
6
TRANSMIT DATA (TXD) INPUT
7
CLEAR TO SEND (CTS) OUTPUT
8
GROUND GROUND
8-PIN AIC CARD TRM CONNECTORS, Jl and
J2
PIN DESCRIPTION FUNCTION
1 GROUND GROUND
2 CLEAR TO SEND (CTS) OUTPUT
3
TRANSMIT DAT A (TXD) INPUT
4 DATA TERMINAL READY (DTR) INPUT
5
RECEIVE DATA (RXD) OUTPUT
6
DATA CARRIER DETECT (DCD) OUTPUT
7
GROUND GROUND
8
REQUEST TO SEND (RTS) OUTPUT
PIN*
ALM UPS EXT2 EXTl
1 Darlington Emittert Ground Ground:j: Ground§
(MJOUTl)
2 Darlington Collectort AC FAILURE EXTERNAL TTL:j: EXTERNAL TTL§
(MAJOR!Nl) (ACFSETO) (EXT2INO) (EXTlINO)
3
Darlington Emitter!! Ground Ground Ground
(MINOUTl)
4 Darlington Collector!! LOWBAT NC NC
(MININl) (LOWBSETO)
LEGEND:
NC - No Connection
* -
Pl is on the right and P4 is on the left of each modular jack, referenced with the
component side up and the face plate toward you.
t -
Major Alarm outputs (intended for activating an External Alarm Processing Unit).
t -
Closure across these pins results in major alarm (accepts either TTL or Closure).
§ - Closure across these pins results in minor alarm (accepts either TTL or Closure).
,r -
Minor Alarm outputs (intended for activating an External Alarm Processing Unit).
CONNECTOR AND CABLING INFORMATION B-123