Figure 5-2. Direct Rs-232 Interface - AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual

Data Communications Support

Figure 5-2. Direct RS-232 Interface

To use this method, it is important that the fax machine be ordered with an EIA-
RS-232 connection, with V.28 or V.35 interface.
In this method, there is a direct connection between the Group IV (G4) Fax
machine and a 7500B Data Module. The standard RS-232 interface on the
back panel of the Group IV (G4) Fax machine is connected from the jack by an
EIA-232D cable to the RS-232D interface jack (port 1 ) on the 7500B Data
Module. This connection is a simple jack-to-jack plug-in operation. It provides
the imagery transmission path.
The 7500B Data Module is a DCE terminal adapter that connects unattended
DTE or other DCE to the Basic Rate Interface (BRI), for example, a 008 MLX or
408 GS/LS-MLX (Release 2.0 only) module in the control unit. This application
describes the Group IV (G4) Fax machine as synchronous DTE sending and
receiving imagery transmission through the digital network.
PRI Applications
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