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SAT, DTU, SMDR,
Z3A1
Z3A4
CAS (ON-PREMISES
ADU
ADU
DIRECT CONNECTION)
*
*
*REQUIRED FOR CONNECTIONS >50 FEET
OR NOT SHARING SAME AC OUTLET
———————————————
SAT, SMD,
CAS (ON-PREMISES
Z3A1/4
SWITCHED CONNECTION)
ADU
TN726
DATA LINE CP
Z3A4
ADU
TN726
DATA LINE CP
———————————————
SAT, SMDR,
CAS (OFF-PREMISES
DIRECT CONNECTION)
MODEM
MODEM
(212-TYPE)
CO
(212-TYPE)
———————————————
SAT, SMDR,
CAS (OFF-PREMISES
SWITCHED CONNECTION)
†
OPS
TN742
ANALOG LINE CP
MODEM
CO
(212-TYPE)
}
OR
CO
†
OFF-PREMISES STATION
OR CO TRUNK
Z3A4
ADU
PART OF DIGITAL SWITCH
ZTN82 OR
ZTN128
PROCESSOR CP
(1) SAT
(2) SMDR, CAS
(3) DTU
(4) RESERVED
ZTN82 OR
ZTN128 CALL
TIME
PROCESSOR CP
DIVISION
MULTIPLEX
BUS
ZTN82 OR
ZTN128 CALL
PROCESSOR CP
ZTN76 GROUND
START TRUNK
CP OR ZTN77
LOOP START
TRUNK CP
TN726
DATE LINE CP
ZTN82 OR
ZTN128 CALL
PROCESSOR CP
Figure 3-6. Equipment Connected to System 25 Via the Call Processor and Port
Circuit Packs (Sheet 2 of 3)
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