Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual page 357

Chapter 10 Timing
Table 10-3
Message
G812T
G812L
SETS
DUS
78-18106-01
SDH SSM Messages (continued)
Quality Description
3 Transit node clock traceable
4 Local node clock traceable
5 Synchronous equipment
6 Do not use for timing synchronization
10.3.2 SDH SSM Messages
Cisco ONS 15454 Reference Manual, R8.5
10-5