SS7 Network Testing and Maintenance Messages
SIF: MSU-SNTM Signalling information field:
The frame structura is the same as the SNMM frame.
message flow -----> |
+- - - - - - - - - - - -+- - + - - +---+---+---+-----+-----+- - -
| Test pattern | LI |spare|H1 |H0 |SLC| OPC | DPC | SIO
+- n x 8 bit - 1<=n<=15 +-4- + -4- +-4-+-4-+-4-+--14-+--14-+- - -
|
length |-routing label-|
indicator |-----label-----|
DPC - destination point code (cod: binary)
OPC - originating point code (cod: binary)
SLC - signalling link code
H0 - heading code 0
H1 - heading code 1
Network Management Message types: 5.4/Q.707
H1: H0:
---- 0000 Spare
0001 0001 SLTM Signalling link test message
0010 0001 SLTA Signalling link test acknowledgement message
------0010...1111 Spare