Alcatel-Lucent 7450 - Page 260

Network Synchronization
260 Basic System Configuration Guide
Table 32: Synchronization Message Coding and Source Priorities — SSM Transmitted
SSM values to be transmitted by interface of type
Internal Relative
Quality Level
SDH interface
SyncE interface
in SDH mode
SONET Interface
SyncE interface in
SONET mode
E1 interface T1 interface (ESF)
1 - Best quality 0010 (prc) 0001 (PRS) 0010 (prc) 00000100 11111111 (PRS)
2 0100 (ssua) 0000 (stu) 0100 (ssua) 00001000 11111111 (stu)
3 0100 (ssua) 0111 (st2) 0100 (ssua) 00001100 11111111 (st2)
4 0100 (ssua) 0100 (tnc) 0100 (ssua) 01111000 11111111 (tnc)
5 1000 (ssub) 1101 (st3e) 1000 (ssub) 01111100 11111111 (st3e)
6 1000 (ssub) 1010 (st3/eec2) 1000 (ssub) 00010000 11111111 (st3)
7 1011 (sec/eec1) 1010 (st3/eec2) 1011 (sec) 00010000 11111111 (st3)
8 - Lowest quality
qualified in QL-
enabled mode
1011 (sec/ eec1) 1100 (smc) 1011 (sec) 00100010 11111111 (smc)
9 1111 (dnu) 1100 (smc) 1111 (dnu) 00100010 11111111 (smc)
10 1111 (dnu) 1111 (dus) 1111 dnu 00101000 11111111 (st4)
11 1111 (dnu) 1110 (pno) 1111 (dnu) 01000000 11111111 (pno)
12 1111 (dnu) 1111 (dus) 1111 (dnu) 00110000 11111111 (dus)
13-
QL_INVALID
1111 (dnu) 1111 (dus) 1111 (dnu) 00110000 11111111 (dus)
14- QL-FAILED 1111 (dnu) 1111 (dus) 1111 (dnu) 00110000 11111111 (dus)
15 - QL-UNC 1011 (sec/eec1) 1010 (st3/eec2) 1011 (sec) 00010000 11111111 (st3)
Note: When the internal Quality level is in the range of 9 through 14, the output codes shown
in Table 32, will only appear if QL selection is disabled. If ql-selection is enabled, then all of
these internal states are changed to internal state 15 (Holdover) and the ssm value
generated will reflect the holdover quality of the internal clock.