Specifications

4 Message Reference
44
4.3.7 MVD_MSG_SC_FIXDATA - Fixed Data Output Request
Synopsis
Message sent to the DSI SPCI Board in order to generate a fixed pattern on a specific
T1/E1 Line Interface Unit timeslot.
Format
MESSAGE HEADER
Field Name
Meaning
type
MVD_MSG_SC_FIXDATA (0x7e15)
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
6
PARAMETER AREA
Offset
Size
Name
0
2
liu_id
2
2
timeslot
4
2
pattern
Description
This message is sent to the DSI SPCI Board in order to generate a fixed pattern on a
specific timeslot of an T1/E1 Line Interface Unit. It is typically issued at initialization
and whenever a call terminates to generate an IDLE pattern towards the network.
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.
Note: For the DSI SPCI2S, valid values for the LIU identifiers are 2 and 3.
timeslot
The timeslot number on the T1/E1 line interface unit on which the fixed data is
transmitted. The valid range for timeslot is 1 to 31 for an E1 interface and 1 to 24 for
a T1 interface.
pattern
The value of the fixed data to be generated. The value must be in the range 0 to 255.
Typical values are 0xff for an "all ones" idle pattern, or 0x2a for an ITU-T E1 idle
pattern.