Specifications

X723-300151 1-1 Issue 2
1 Equipment Detail
1.1 General Description
This manual applies to 3200 units fitted with operating firmware DT981/6.
The 3200 multiplexer is a software controlled multiplexer and switch
providing multiplexing of voice and 64kbit/s data circuits in to 2048kbit/s
or 1544kbit/s PCM streams, and Nx64kbit/s X.21 lines. The unit is
capable of accessing up to four PCM streams via Port 1 and Port 2,
allowing multiplexing of data on to any stream and cross-connection
between streams. The unit may be operated as a 30 channel system in
CAS mode or as a 31 channel transparent system in CCS mode.
Multiplexing and cross-connection is performed on a timeslot basis.
Additional PCM streams can be provided with some restrictions on cross-
connectivity due to backplane bandwidth limitations in Port 3 and Port 4.
Automatic re-routing of essential traffic may be accomplished by utilising
the 14 configurations available and the Network Management System.
The 3200 utilises a microprocessor based system control card for data
cross-connection, synchronisation, general supervision, and the user
interface. The user interface takes the form of a menu tree presented on a
standard RS-232 port.
Interface connections to the 3200 are by Dual Line Interface Units for
2048kbit/s, T1 Line cards for 1544kbit/s or Dual Nx64kbit/s cards for
aggregate PCM lines, and by a range of channel interface cards for voice
and data circuits. Information on all interface cards is contained in
separate manuals for each card. Some channel cards are also
microprocessor based and have a user interface which is presented via the
system control card. Such cards are called 'Smart' channel cards, and the
user gains access to these through a 'Smart' interface option provided by
the system control card.
The 2048kbit/s PCM line signal interfaces to a Dual LIU in the 3200. This
card can operate as either a Smart channel card when fitted in Port 3 or
Port 4, or integrate with the system control card to present one user