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DSI SS7MD Programmer’s Manual Issue 3
• loop_mode
The diagnostic loopback mode. The following table shows the permitted values and their meanings.
• prbs_gen
The Pseudo Random Bit Sequence (PRBS) generation mode. The following table shows the permitted
values and their meanings.
6.3.3 LIU_MSG_R_CONFIG – LIU Read Configuration Request
Synopsis
Message sent by the application to read back the current LIU configuration from the board.
Format
Description
This message is sent to the board to read back the current operating configuration of the Line Interface Unit
(LIU). The user should always request a confirmation message. The confirmation message indicates success
with a status value of 0 and contains the current configuration parameters in the parameter area of the
message.
Value Description
0 Do not change diagnostic loopback mode
1 Disabled - remove any diagnostic loop
2 Payload loopback
3 Remote loopback
4 Local loopback
Value Description
0 Do not change PRBS generation mode
1 Disabled - remove any PRBS generation
3 Generate PRBS pattern QRSS 20
MESSAGE HEADER
Field Name Meaning
type LIU_MSG_R_CONFIG (0x5e37)
id liu_id (in the range 0 to one less than the number of LIUs)
src Sending module ID
dst MVD_module_ID
rsp_req Used to request a confirmation.
hclass 0
status 0
err_info 0
len 40
PARAMETER AREA
Offset Size Name
040
Parameter area formatted in the same manner as the
LIU_MSG_CONFIG message.
All fields should be set to 0.
The confirmation message contains the board configuration details.
The user should set the fields to 0 and the module writes the current
configuration parameters in the confirmation message.