System Basics Introduction
Page 198 7210 SAS D, E, K OS Basic System Configuration Guide
Table 24:
Synchronization Message Coding and Source Priorities
0100 (ssua) 0100 (tnc) 0100 (ssua) 01111000 11111111
(TNC)
4.
1101 (st3e) 01111100 11111111
(ST3E)
5.
1000 (ssub) 1000 (ssub) 6.
1010 (st3/eec2) 00010000 11111111
(ST3)
7.
1011 (sec/eec1) 1011 (sec) 8. Lowest quality
qualified in QL-
enabled mode
1100 (smc) 00100010 11111111
(smc)
9.
00101000 11111111
(st4)
10.
1110 (pno) 01000000 11111111
(pno)
11.
1111 (dnu) 1111 (dus) 1111 (dnu) 00110000 11111111
(dus)
12.
Any other Any other Any other N/A 13. QL_INVALID
14. QL-FAILED
15. QL-UNC
SSM values to be transmitted by interface of type
Internal
Relative
Quality Level
SDH interface
SyncE interafce 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)