AT&T System 75, Wiring Diagram

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CHAPTER 5. AUXILIARY EQUIPMENT INSTALLATION
Figure 5-26 shows the cabling required to connect the 94A LSU, a
printer, or customer-provided data communications equipment (DCE).
The M25B cable connects to the C1 connector on the 94A LSU.
50 FEET
MAXIMUM
M 2 5 B
94A LSU
OR
PRINTER
OR
CUSTOMER
PROVIDED
DCE
TRUNK
DATA
MODULE
M25B
M1OM
NULL MODEM
CABLE
M25B
PDM
M1OM
M25B NULL MODEM
M25B
MODEM
Figure 5-26. SMDR Cabling for On-Premises Data Communications
Equipment
Figure 5-27 shows the connections for a remote host connected by a
private line.
50 FEET
MAXIMUM
PRIVATE LINE
MODEM
M25B
TRUNK
TO
OR
DATA
REMOTE HOST
DSU
MODULE
Figure 5-27. SMDR Cabling for a Remote Host
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