Specifications
FOM-40 Installation and Operation Manual  Chapter 2 Installation and Setup 
  Installing FOM-40  2-3 
Connecting the Cables 
Figure 2-1. FOM-40 Rear Panel (AC Version) 
Connecting the Fiber Optic Interface 
Two fiber optic ST, SC, or FC connectors are located on the rear panel and 
marked TX and RX. 
 
To connect the fiber optic cables 
1.  Remove the protective caps from the connectors and store them in a safe 
place for later use. 
2.  Connect the transmit fiber to the connector marked TX and the receive fiber to 
the connector marked RX. 
3.  At the remote unit connect the transmit fiber to RX and the receive fiber to TX. 
Connecting the DTE 
The rear-panel DTE connector provides interface for data input/output, clock 
reference and control signal exchange between FOM-40 and the DTE. RAD offers 
interface cables for the DTE connection, refer to Table 2-1 for the DTE interface 
connector description. 
Table 2-1. DTE Interfaces and Matching Connector Cables 
DTE Interface  Description  RAD Cable 
V.24 (RS-232)  25-pin, D-type, female (see Appendix A for the connector pinout)  CBL-HBT/V24 
V.35  34-pin, female (see Appendix A for the connector pinout)  CBL-HBT/V35 
RS-530  25-pin, D-type (see Appendix A for the connector pinout) CBL-HBT/RS-530 
V.36  Via adapter cable converting between RS-530 connector and 37-pin, 
D-type, female connector (see Appendix A for the cable pinout) 
CBL-530/449 (supplied 
with the unit) 
IR-X21  15-pin, D-type, female (see Appendix F for the module description)  CBL-HBT/X21 
IR-G.703/CO  5-clip terminal block or RJ-45 (see Appendix E for the module 
description) 
IR-ETH/QV RJ-45 (see Appendix C for the connector pinout)   
DTE Interface  Fiber Optic Interface AC Power 
SW5 Switches 










