AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 239

Data Communications Support
The dialing path in this configuration requires a Multipurpose Enhancement
Board that is installed in port 2 of the Data Module. The dialing path is then
established by connecting the RS-366 jack on the Group IV (G4) Fax machine
to the RS-366 jack in port 2 on the back panel of the 7500B Data Module. An
RS-366 cable is required for the connection.
The 7500B Data Module is then connected from the Line jack on the back panel
to an MLX port on an 008 MLX or 408 GS/LS-MLX module (Release 2.0 only) in
the control unit, Completing the link is the PRI trunk connection that is plugged
into the jack on the channel service unit (CSU) shown in the Figure 5-2. The
CSU is then plugged into the 100 DSI Module in the control unit.
This connection is recommended when manual dial is used to dial the fax
transmission telephone numbers from the fax dial pad.
It is recommended that the 75006 Data Module be located in a safe location,
away from accidental tampering with the configuration settings, which could
result in misdialed calls.
For the 7500B Data Module to operate properly, the DCE/DTE Flipboard circuit
card in the unit must be in the proper position before the Group IV (G4) Fax
machine can operate as a DCE unit.
The MLX telephone in the configuration shares the same MLX port as the 7500B
Data Module and can be used to send and receive voice calls. It is not
essential to the fax operation. However, if an MLX set is not connected to the
7500B Data Module, a 100-ohm terminating resistor adapter must be installed
close to the 7500B Data Module on the line to the carrier.
Fax Configuration 2: RS-232 to V.35 Interface Conversion
This configuration is used when users need to operate other adjunct equipment
from the 7500B Data Module. Other equipment may include modems,
automatic calling equipment (RS-366 interface), or DTE with V.35 interface.
Figure 5-3 shows the connections required for a Group IV (G4) fax V.35
interface connecting to a data module RS-232D interface.
PRI Applications 5-21