Welltech SPCI2S Intel NetStructure SS7 Boards - Manual (Page 73)

SS7 Programmer’s Manual for SPCI2, SPCI4 and CPM8 Issue 2 Page 73
5.3.12 Configure Clock Priority Request
Synopsis:
Message sent to a SPCI2S, SPCI4 or CPM8 board to configure the clock
recovery priority order
Message Format:
MESSAGE HEADER
FIELD NAME MEANING
type MVD_MSG_CLK_PRI (0x7e21)
id 0
src Sending Module ID
dst MVD_TASK_ID
rsp_req
used to request a confirmation
hclass 0
status 0
err_info 0
len 8
PARAMETER AREA
OFFSET SIZE NAME
0 1 liu0_pri
1 1 liu1_pri
2 1 liu2_pri
3 1 liu3_pri
4 1 liu4_pri
5 1 liu5_pri
6 1 liu6_pri
7 1 liu7_pri
Description:
This message allows the user to specify a priority for each line interface. When
configured to recover clock from the line interfaces, this priority is used to
decide which line interface to use as the clock source. The highest priority in-
sync line interface will be used, with the card automatically moving through the
list of clock sources as line interfaces lose synchronisation or are deemed
stable again. If no interfaces are in sync, the board will remain in ‘holdover’
mode, based on the last valid clock that was recovered.
The confirmation message (if requested) will indicate success by a status of 0.