AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 240

Data Communications Support
Figure 5-3. RS-232 to V.35 Interface Conversion
A V.35-to-RS-232 converter must be used between the fax machine and the
7500B Data Module. This configuration requires the use of the optional
Multipurpose Enhancement Board in port 2 of the 7500B Data Module to set up
an RS-366 dialing interface. The configuration allows the Group IV (G4) Fax
machine to be connected to port 1 for imagery transmission. The fax machine
is connected by a V.35 cable to the converter's V.35 port, and then from the
converter's RS-232 port to the 7500B Data Module's RS-232 port. The dialing is
accomplished from the RS-366 interface on the fax machine to the RS-366
interface in port 2 of the 75008 Data Module.
The Multipurpose Enhancement Board provides an RS-366 auto dial interface
on port 2. It converts the RS-232 interace on port 1 on the main circuiit board
from asynchronous to synchronous mode. The V.35 adapter cable must be
ordered separately from the board in order to operate at data rates of 56 and 64
Kbps. Without the cable, data rates are limited to 1200, 2400, 4800, 9600, and
19,200 bps.
5-22 PRI Applications