Adaptive Clock Recovery; Table 33 Synchronization Message Coding And Source Priorities - Nokia 7210 Configuration Manual

System Management
Synchronization Message Coding and Source Priorities (Continued)
Table 33
SSM values to be transmitted by interface of type
Internal Relative SDH Interface
Quality Level SyncE interface in
SDH mode
10. 1111 (dnu)
11. 1111 (dnu)
12. 1111 (dnu)
13. 1111 (dnu)
14. 1111 (dnu)
15. 1011 (sec/eec1)

6.5.7 Adaptive Clock Recovery

Note:
ACR is a timing-over-packet technology that transports timing information via
periodic packet delivery over a pseudowire. ACR is used when there is no other
Stratum 1 traceable clock available.
There is no extra equipment cost to implement ACR in a network because ACR uses
the packet arrival rate of a TDM pseudowire to regenerate a clock signal. The nodes
in the network that are traversed between endpoints do not need special ACR
capabilities. However, because the TDM pseudowire is transported over Layer 2
links, the packet flow is susceptible to PDV.
Use the following recommendations to achieve the best ACR performance.
280
SONET Interface
SyncE interface in
SONET mode
1111 (dus)
1110 (pno)
1111 (dus)
1111 (dus)
1111 (dus)
1010 (st3/eec2)
• Adaptive Clock Recovery (ACR) is supported only with CES MDAs on the 7210 SAS-M
configured in network mode.
• ACR is supported only on the 7210 SAS-M (both ETR and non-ETR variant) configured
in network mode with T1/E1 CES MDAs.
Use subject to Terms available at: www.nokia.com
7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
E1 Interface
1111 dnu
1111 (dnu)
1111 (dnu)
1111 (dnu)
1111 (dnu)
1011 (sec)
© 2021 Nokia.
Configuration Guide
T1 Interface (ESF)
00101000 11111111
(st4)
01000000 11111111
(pno)
00110000 11111111
(dus)
00110000 11111111
(dus)
00110000 11111111
(dus)
00010000 11111111
(st3)
3HE 17358 AAAB TQZZA