Unit installation

Chapter 1 Introduction Installation and Operation Manual
1-4 Overview FCD-E1
The optical interface fully emulates the operation of a standard E1 electrical main
link module, including the use of an HDB3-encoded optical signal, and AIS
transmission.
Sublink Interface
FCD-E1 can be ordered with a sublink interface. The sublink interface is always an
electrical interface. Its characteristics are identical to the characteristics of the
electrical main link interface, except that it does not support the unframed mode.
Data Channel Interfaces
The FCD-E1 synchronous data channel can be ordered with one of the following
types of interfaces: RS-530, V.35, X.21, and V.36/RS-449. Each data port is
terminated in a 25-pin D-type female connector.
The conversion between the 25-pin channel interface connector and the standard
V.35, X.21 or V.36 interface connectors is made by means of adapter cables:
• V.36/RS-449 interface: the adapter cable is terminated in a 37-pin D-type
female connector.
• V.35 interface: the adapter cable is terminated in a 34-pin female connector.
• X.21 interface: the adapter cable is terminated in a 15-pin D-type female
connector.
Suitable adapter cables can be ordered from RAD (see Error! Bookmark not
defined. and Chapter 2).
The FCD-E1 synchronous data port supports the following control lines:
• RTS - input from the locally connected user’s equipment.
• CTS - the user can permanently set the CTS line in the active state, or can
make the CTS line follow the RTS line.
• DSR - the DSR line is always active when the FCD-E1 is powered, except
when a remote main link test loopback is activated.
• DCD - the DCD line is active when the FCD-E1 main link interface is
synchronized.
Ethernet Interfaces
The 10BaseT Ethernet interface complies with IEEE 802.3 and Ethernet V.2
standards. It is terminated in an RJ-45 shielded connector that operates over UTP
media.
To provide control over the Ethernet traffic flowing through the main link, the
Ethernet interface can be ordered with one of the following options:
• Full-feature remote bridge, IR-ETH. You can disable the bridge, to operate the
FCD-E1 link as a LAN extender (repeater).
• Full-feature remote bridge with VLAN support, IR-ETH/Q. You can disable the
bridge, to operate the FCD-E1 link as a LAN extender (repeater).
Both bridges can operate at wire speed. For further information on the IR-ETH and
IR-ETH/Q interfaces, refer to Appendix E and Appendix F, respectively.