Welltech SPCI2S Intel NetStructure SS7 Boards Instrukcja Użytkownika Pobierz pdf (Strona 84)

SS7 Programmer’s Manual for SPCI2, SPCI4 and CPM8 Issue 2 Page 84

5.5.3 Clock Event Indication

Synopsis:

Message issued by the board to indicate on-board clocking related events.

Message Format:

MESSAGE HEADER

FIELD NAME MEANING

type MVD_MSG_CLK_IND (0x0e23)

src MVD_TASK_ID

dst

0xdf

rsp_req

hclass

status event_id (see below)

err_info

Reserved for future use

len

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 Description

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,

6 CT bus clock set B recover

The CT bus clock set B signals are being driven.

7 Master clock changeover

The card issuing this indication has automatically changed from secondary master to

primary master role for the clock set it was configured to drive.

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Welltech SPCI2S Intel NetStructure SS7 Boards Instrukcja Użytkownika Strona 84