Specifications

4 Message Reference
36
4.3.2 LIU_MSG_CONTROL - LIU Control Request
Synopsis
Message sent by the application to dynamically control operation for a Line Interface
Unit (LIU). Allows setting of outgoing alarms and diagnostic loopbacks.
Format
MESSAGE HEADER
Field Name
Meaning
type
LIU_MSG_CONTROL (0x7e35)
id
liu_id
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
16
PARAMETER AREA
Offset
Size
Name
0
1
ais_gen
1
1
rai_gen
2
1
loop_mode
3
13
Reserved for future use, must be set to zero.
Description
This message is sent to the DSI SPCI Board to perform dynamic changes to the
operation of the Line Interface Unit. It allows the user to control generation of AIS
(Blue alarm) and RAI (Yellow alarm) and to activate various diagnostic loopback
modes.
The confirmation message (if requested) indicates success by status of zero.
Parameters
ais_gen
The mode used to generate the Alarm Indication Signal (Blue Alarm) taken from the
following table:
ais_gen
Description
0
Do not change AIS / Blue alarm generation mode.
1
Disabled - do not generate AIS / Blue alarm.
2
Enabled - generate AIS / Blue alarm.
rai_gen
The mode used to generate the Remote Alarm Indication (Yellow Alarm) taken from
the following table: