Dsu (J12) To Ifu (J1); Dsu J9 (Bu1) Modem Connector To Backup Modem; Dsu Ji Ch To Prime Modem; Table 2-1. 50-Pin Cable - Comtech EF Data SMS-7000 Installation And Operation Manual

Installation
2.4.1.3

DSU (J12) to IFU (J1)

Refer to Figure 2-5.
Cable Assembly Part No. CA/5343 is provided with the switch. This is a single cable
interface between the two switching sections, J12 IF Control Interface on the DSU and
J1 IF Control Interface on the IFU. The cable carries EIA-485 at 9600 baud, control
signals, and power.
2.4.1.4

DSU J9 (BU1) Modem Connector to Backup Modem

Refer to Figure 2-5.
Option – Cable Part No. CA/0737 is offered by Comtech EFData. This 50-pin cable is
available in either straight hoods or right angle hoods. Refer to Table 2-1. This cable
includes two faults, Mod and Demod, pins 49 and 33. The modems will ground the two
pins when a No Fault condition exists. When either a Mod or Demod fault occurs, a line
will either Open, with the 50-pin cable pulled Off, or +5 VDC that is allowed from the
open collector fault circuit on the modem.
2.4.1.5

DSU JI CH to Prime Modem

Refer to Figure 2-5.
Option – Cable Part No. CA/0737 is offered by Comtech EFData.
2–16

Table 2-1. 50-Pin Cable

Part No. Length, ft
CA/0737-2 2
CA/0737-4 4
CA/0737-4R 4
CA/0737-6 6
CA/0737-6R 6
CA/0737-8 8
CA/0737-8R 8
CA/0737-10 10
SMS-7000 Modem Protection Switch
Type
Straight
Straight
Right Angle
Straight
Right Angle
Straight
Right Angle
Straight
Rev. 3