Specifications

4 Message Reference
62
4.4.6 MGT_MSG_SS7_STATE - MTP2 Level 2 State Indication
Synopsis
Indication issued by the board every time the level 2 link state control state machine
changes state.
Format
MESSAGE HEADER
Field Name
Meaning
type
MGT_MSG_SS7_STATE (0x0201)
id
llid (Level 2 logical link id - 0 ... 3)
src
SS7_TASK_ID
dst
0xdf
rsp_req
0
hclass
0
status
Link State (see below)
err_info
Reserved for future use
len
0
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.
Parameters
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
Mnemonic
State
1
S7S_IN_SERVICE
In Service
2
S7S_OUT_SERVICE
Out of Service
3
S7S_INIT_ALIGN
Initial Alignment
4
S7S_ALIGN_NOT_RDY
Aligned, Not Ready
5
S7S_ALIGN_READY
Aligned, Ready
6
S7S_PROC_OUTAGE
Processor Outage
4.4.7 MGT_MSG_SS7_EVENT - MTP2 Q.752 Event Indication
Synopsis
Message issued by MTP2 to advise management of protocol events in accordance with
ITU-T Q.752.