Specifications

X723-300151 1-9 Issue 2
Cards with only 1 circuit will only support circuit 1, and dual cards will
only support circuits 1 and 2.
1.2.3.7 Timeslot Assignment
Each channel card circuit may be assigned a timeslot(s) from the 32
available in each port stream (P1, 2, 3 and 4).
Each port stream timeslot has associated with it a 'TS control' byte, which
is used to control the gain of the A-D D-A converters on VF channel cards
for setting the analogue interface levels. It is not used on data cards.
Timeslot assignment is not required for a Dual LIU in ports 1 or 2. The
Dual LIU automatically connects line 1 timeslots to S1(3) timeslots, and
line 2 timeslots to S2(4) on a fixed one-to-one basis, i.e. line timeslot 1, 2,
3,......31 to S bus timeslots 1, 2, 3,......31.
1.2.3.8 Circuit Controls
Each channel card circuit supports two 8 bit control ports. These are used
to control operating modes, data rates and loops etc. The settings of these
control ports will vary from card to card.
1.2.3.9 Smart Configurations
Smart cards support 2 or 4 configurations. The channel configuration
maps which configuration any individual smart card will run for each of
the 3200 configurations.
1.2.3.10 Fixed Codes
Fixed codes are used when cross-connection of data and signalling is not
required or not possible e.g. due to line failures etc.
A table of 16 combinations of user programmable fixed data and signalling
codes is maintained. Each source timeslot may call up any one of these
codes to be used to replace its data and associated signalling.
1.2.3.11 Cross Connect Assignments
The cross-connect path may be set up for each outgoing timeslot from the
cross connect block on the system controller. Note all backplane data
streams are terminated or sourced from the cross connnect block on the
system controller. In each case the source stream/port, timeslot, mode,
and fixed code is defined. Alternatively a fixed data mode may be used
without any cross-connections.