Dialogic DSI SPCI Network Interface Boards Programmer's Manual page 82

6 Message Reference
Description:
This message is issued by the board to indicate events within the on-board
clocking circuitry.
Parameter Description:
Event ID
This field specifies the event that caused the indication to be generated:
event_id
82
1 PLL entered hold-over mode
Issued by boards acting as primary or secondary clock master when its
nominated clock reference becomes unavailable. The phase-locked-loop
starts operating in "hold-over" mode, continuing to generate an on-board
clock at the same frequency as the last valid reference signal.
2 PLL left hold-over mode
The nominated clock reference for a primary or secondary master board has
become available and the is now being used as the input to the board's clock
circuitry.
3 CT bus clock set A fail
The CT bus clock set A signals are not being correctly driven.
4 CT bus clock set A recover
The CT bus clock set A signals are being driven.
5 CT bus clock set B fail
The CT bus clock set B signals are not being correctly driven.
CT bus clock set B recover
6
The CT bus clock set B signals are being driven.
7 Master clock changeover
The board issuing this indication has automatically changed from secondary
master to primary master role for the clock set it was configured to drive.
Description