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6 Message Reference
Parameters
The parameters that can be included in the MVD_MSG_SC_CONNECT message depend on the requested
mode. The following table depicts the parameters that are required for each possible mode:
• local_stream
Defines which local stream to use for all the modes of operation.The local_stream parameter specifies
either a T1/E1/J1 Line Interface Unit (LIU) or CPU local bus stream. Values for the LIU are in the range 0
to one less than the number of LIUs supported. CPU local bus stream values are in the range 0x90
upwards, the number of CPU local bus streams are one less then the number of LIUs supported.
• local_slot
Defines which timeslot on the local stream to use for all the modes of operation. The local slot value has
different valid ranges depending on the local stream type. The following table shows the permitted
values and their meanings.
• mode
Determines the operating mode. The following table shows the permitted values and their meanings.
Mode
Required Parameters
local_
stream
local_slot
source_
stream
source_
timeslot
dest_
stream
dest_
timeslot
pattern
1*
1
*
1
**000
2**00**0
3*
1
*
1
****0
4*
1
*
1
00000
5**00000
6*
1
*
1
00000
8*
1
*
1
**000
11 *
1
*
1
**000
12 *
1
*
1
*
1
*
1
000
13 *
1
*
1
*
1
*
1
000
* indicates that the parameter is required,
1
indicates that CPU local bus stream values are invalid.
Local Stream Type Local Slot Range
Local stream to E1 LIU 1 to 31
Local stream to T1 LIU 1 to 24
Local stream to CPU 1 to 31
Value Meaning
1
Make a simplex connection from a timeslot on the cross connect switch to a
timeslot on the local bus. Use the local_stream, local_slot, source_stream, and
source_slot parameters to specify the local and switch timeslots, respectively.
2
Make a simplex connection from a timeslot on the CPU local bus stream to a
timeslot on the cross connect switch. Use the local_stream, local_slot,
dest_stream, and dest_slot parameters to specify the local and switch
timeslots, respectively.
3
Make a duplex connection between a CPU local bus stream timeslot and two
cross connect switch timeslots. Use the local_stream, local_slot, source_stream,
and source_slot parameters to specify one simplex connection; and the
local_stream, local_slot, dest_stream, and dest_slot parameters to specify the
other simplex connection.
4
Remove a simplex connection from a timeslot on the cross connect switch to a
timeslot on the CPU local bus. Use the local_stream and local_slot parameters
to specify the timeslot for disconnection.
5
Remove a simplex connection from a timeslot on the CPU local bus to a timeslot
on the cross connect. Use the local_stream and local_slot parameters to specify
the timeslot for disconnection.