Mtp2 Level 2 State Indication - Dialogic DSI SPCI Network Interface Boards Programmer's Manual

6 Message Reference
6.4.6

MTP2 Level 2 State Indication

Synopsis:
Indication issued by the board every time the level 2 link state control state
machine changes state.
Message Format:
Field Name
type
id
src
dst
rsp_req
hclass
status
err_info
len
Description:
This message is issued by the MTP2 module every time a change of state
takes place at level 2. It is intended only for diagnostic use by system
management. Normally the MTP Pause and MTP Resume Indications are used
by the user parts to determine destination accessibility.
The level 2 link state control state machine is defined in Q.703.
Parameter Description:
Link State
The status field in the message header is used to indicate the state that has
just been entered. It is coded as follows:
Value
1
2
3
4
5
6
86
MESSAGE HEADER
Meaning
MGT_MSG_SS7_STATE (0x0201)
llid (Level 2 logical link id - 0 ... 3)
SS7_TASK_ID
0xdf
0
0
Link State (see below)
Reserved for future use
0
Mnemonic
S7S_IN_SERVICE
S7S_OUT_SERVICE
S7S_INIT_ALIGN
S7S_ALIGN_NOT_RDY
S7S_ALIGN_READY
S7S_PROC_OUTAGE
State
In Service
Out of Service
Initial Alignment
Aligned, Not Ready
Aligned, Ready
Processor Outage