User guide

August 2001 177
Switching Calls through the MVIP-90 Bus
Making a Broadcast Connection
In a broadcast connection, a resource transmits data to a
specified stream and timeslot, then several other resources
receive data from that timeslot. In Figure 34, a board places
data on stream 4, timeslot 2 (4, 2). Then several boards take
data from that timeslot.
Figure 34. A Broadcast Connection and Distribution
One example of a broadcast is a hold message. One VP resource
continuously plays a hold message over a specified stream and
timeslot. In Figure 34, board A is transmitting the data on
stream 4, timeslot 2. When calls on boards B, C, and D are put
on hold, they are connected through the MVIP bus to take the
hold message from stream 4 timeslot 2. Any number of
resources can be connected to the broadcast timeslot at any
time.
Board A can broadcast to several different boards, as shown in
Figure 34. Or, board A can broadcast a call to other resources on
that board.
To perform a broadcast, make a half-duplex connection between
the internal resource and a timeslot on the MVIP bus. Then
make a half-duplex connection between the timeslot carrying
the transmitted data and the timeslots for resources to receive
data.
MVIP Bus
A
(4, 2)
(4, 2)
(4, 2) (4, 2)
BC
D
DSi4
DSo4