Specifications

4 Message Reference
40
Value
Mnemonic
Description
0x01
None
Invalid framer ID.
0xff
None
Invalid message length.
4.3.5 MVD_MSG_SC_DRIVE_LIU - LIU CT bus Initialization Request
Synopsis
This message is sent to the board at initialization time to set up a static switch path
through the board between the Line Interface Unit (LIU) and the CT bus. It connects
selected incoming voice timeslots from a T1/E1 LIU to a sequential block of channels
on the CT bus and prepares the outgoing timeslots for subsequent use by the
MVD_MSG_SC_LISTEN message.
Note: When using s7_mgt, this message is generated by s7_mgt as a result of the LIU_SC_DRIVE
command. It therefore does not need be generated by the user.
Format
MESSAGE HEADER
Field Name
Meaning
type
MVD_MSG_SC_DRIVE_LIU (0x7e18)
id
0
src
Sending Module ID
dst
MVD_TASK_ID (0x10)
rsp_req
used to request a confirmation
hclass
0
status
Status Response (if confirmation requested)
err_info
0
len
10
PARAMETER AREA
Offset
Size
Name
0
2
liu_id
2
2
sc_channel
4
4
ts_mask
8
2
mode
Parameters
liu_id
The identifier of the T1/E1 Line Interface Unit in the range 0 to one less than the
number of LIUs fitted. This parameter can also be set to the special value 0x83 to
select the signaling processor instead of an LIU. In this case timeslots 0 ... 3
correspond to signaling processor 0 ... 3 respectively.
sc_channel
The channel number of the first channel to be used on the CT bus. This must be in the
range from 0 up to one less than the total number of channels on the CT bus.