Specifications

Chapter 2 Installation and Setup Installation and Operation Manual
2-4 Site Requirements and Prerequisites FCD-E1LC Ver. 1.0
over coaxial cables. Both interfaces are terminated in an RJ-45 eight-pin
connector.
At any time, only one interface is active. The selection of the interface is
automatically made, in accordance with the cable connected to the port:
• The cable used for connecting to equipment with balanced E1 interface
should include only two twisted pairs, one for the transmit path and the
other for the receive path.
One of the contacts in the E1 port connectors is used to sense the connection of
the unbalanced adapter cable (see below). Therefore, do not connect cables with
more than two pairs when you want to use the balanced interface.
• To connect to equipment with unbalanced E1 interface, it is necessary to
convert the FCD-E1LC RJ-45 connector to the standard pair of BNC female
connectors used for unbalanced E1 interfaces. For this purpose, RAD offers
15 cm long adapter cables: CBL-RJ45/2BNC/E1/X for the main link port and
CBL-RJ45/2BNC/E1 for the sublink port. These cables have one RJ-45 plug for
connection to FCD-E1LC connector and two BNC female connectors at the
other end.
Connecting the cable to the FCD-E1LC main or sublink connector will cause
the corresponding interface to switch to the unbalanced mode.
The FCD-E1LC main and sub interfaces must not be directly connected to
unprotected public telecommunication networks. The connection to such
networks must be made through a network termination unit that provides
separation between the interface conductors and the telecommunication network
conductors in accordance with the applicable local regulations.
Serial Data Port Connections
The serial data ports of FCD-E1LC are terminated in a 25-pin D-type female
connector. The interface type is RS-530 (which also supports X.21), V.36/RS-449,
V.24, or V.35, according to the order.
• When using the RS-530 or V.24 interface, equipment with RS-530 or,
respectively, V.24 interface can be directly connected to the data channel
connector using standard cables.
• For the X.21 interface, an adapter cable, terminated in a 15-pin D-type
female connector, is needed.
• For the V.35 interface, an adapter cable, terminated in a 34-pin female
connector, is needed.
• For the V.36/RS-449, an adapter cable, terminated in a 37-pin D-type female
connector, is needed.
Ethernet Port Connections
The optional Ethernet port has a 10/100Base-T Ethernet interface terminated in
an RJ-45 connector, designated 10/100BASE-T.
Note