Unit installation

Installation and Operation Manual Chapter 1 Introduction
FCD-E1 Functional Description 1-15
Management Subsystem
The management subsystem controls the FCD-E1 operation, in accordance with its
operating software. The basic capabilities of the management subsystem are
presented in Management on page 1-7. The management subsystem also includes
an SNMP agent, and a proprietary IP router for SNMP management traffic.
The management subsystem exchanges information and sends commands through
several ports:
• The communication with the various internal subsystems of the FCD-E1 is
performed through the management address and data buses. The subsystem
also controls the front-panel indicators, and the rear-panel alarm relay.
• The communication with the supervision terminal is performed through the
front panel RS-232 serial port interface. This port is used to perform the initial
configuration of the FCD-E1, using any standard ASCII (“dumb”) terminal (or
PC running a basic communication or terminal emulation program). After the
initial configuration, the port can be used to control and monitor FCD-E1
operation.
• In addition to the front-panel serial port (CONTROL DCE), FCD-E1 has an
additional port, located on the rear panel (CONTROL DTE). This port can be
used as an alarm reporting port (connected through a dial-up modem link to a
remote alarm monitoring terminal).
• When inband management is enabled, the management subsystem transmits
and receives management traffic through the E1 ports. The communication
with the E1 ports is made through the TDM bus.
Power Supply Subsystem
FCD-E1 can be powered by 100 to 240 VAC, 50/60 Hz, or by -48 VDC, in
accordance with order. Figure 1-3 shows an AC-powered FCD-E1:
• The AC input voltage passes through a protection fuse located in the AC input
connector, and through the POWER on/off switch (the DC-powered FCD-E1
does not include a fuse). The POWER switch includes an internal indicator that
lights when the FCD-E1 is turned on.
• The AC input voltage is applied to the main power supply voltage, which
generates the regulated voltages required for the FCD-E1 internal circuits.
Timing Considerations
Main Link Timing Application
Figure 1-4 shows a typical application in which FCD-E1 is operated with the main
link as the timing reference source, and illustrates the flow of timing signals within
the system.