Specifications

Chapter 1 Introduction Installation and Operation Manual
1-16 Functional Description FCD-E1LC Ver. 1.0
• Serial data channels: local and remote loopbacks.
Timeslot Handling
When operating in any of the framed modes, FCD-E1LC allows you to configure
the routing of the individual timeslots for the data channels (including the
Ethernet interface) and for the sublink. The routing can be modified during
system operation, without disrupting the service to users of timeslots that are
not rerouted. FCD-E1LC automatically connects the timeslots in both the receive
and transmit directions.
You can either individually select the main link timeslots in which the user’s data
is to be inserted, or can use the “bundle” routing mode. Timeslots connected to
data channels are always defined as data timeslots.
To help you route timeslots correctly, FCD-E1LC automatically checks the validity of
your inputs, and reports, by means of error messages, inconsistencies and invalid
selections. The conditions reported include:
• Attempt to allocate to user’s traffic timeslots that must be reserved for
system use: timeslot 16 when G732S multiframes are used, or a timeslot
dedicated to the management traffic between two FCD-E1LC units connected
in a link.
• Total bandwidth requested exceeds the available main link bandwidth:
 Maximum possible – 31 timeslots.
 Maximum 30 timeslots when using G732S framing, or G732N framing with
a timeslot dedicated to management.
 Maximum 29 timeslots when using G732S framing and a timeslot
dedicated to management.
When a sublink is installed, the available main link bandwidth is reduced by
the number of timeslots configured as the sublink payload.
• Number of timeslots assigned to the data channel(s) does not match the
number required to support the selected data rate.
Management Subsystem
The management subsystem controls FCD-E1LC operation, in accordance with its
operating software. The management subsystem also includes an SNMP agent,
and a proprietary IP router for SNMP management traffic.
The database management, as well as the other configuration, test and
monitoring activities (equipment status reading, alarm status and history,
activation of test loops, reading of performance statistics, etc.) can be performed
in three ways:
• Supervision Terminal − A “dumb” ASCII terminal connected to the RS-232 port
of the FCD-E1LC (or a PC running a terminal emulation program), controlled
by the program stored in the FCD-E1LC, can be used as a supervision
terminal. FCD-E1LC supports both point-to-point and multidrop connections.