Nokia 7210 SAS-M - Page 271

7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
Configuration Guide
System Management
Edition: 01 3HE 16132 AAAB TQZZA 271
• synchronous Ethernet ports
On the 7210 SAS-M (includes all variants), 7210 SAS-T (includes all variants),
7210 SAS-R6, 7210 SAS-R12, 7210 SAS-Sx 1/10GE (all variants),
7210 SAS-S 1/10GE (all variants), and 7210 SAS-Sx 10/100GE
• 1588v2/PTP slave port
On the 7210 SAS-M (includes all variants), 7210 SAS-T (includes all variants),
7210 SAS-R6, 7210 SAS-R12, 7210 SAS-Sx 1/10GE(all variants)
Figure 24 shows a logical model of synchronization reference selection for the
platforms, and Table 31 provides a list of supported interfaces for each platform.
Figure 24 Logical Model of Synchronization Reference Selection on 7210 SAS
When the CES MDA is used on the 7210 SAS-M (all variants), in addition to the
preceding references, the recovered clock derives the timing from either of the
following references:
• T1/E1 CES channel (not available for node reference)
• T1/E1 port (for loop-timing; not available for node reference)
On the 7210 SAS-Mxp, 7210 SAS-R6, 7210 SAS-R12, and 7210 SAS-T, in addition
to PTP and SyncE references, the recovered clock can be configured to derive the
timing (frequency reference) from the BITS interface.
26997
SyncE
1588
T1/E1
ref1
BITS
Output
Selector
Internal
(Node)
Timing
Reference
BITSout
T1/E1
2048 kHz
ref2
ptp
BITSin
Quality Level Override
T1/E1 BITSin
Qualifier
Qualifier
Qualifier
Qualifier
Qualifier
Quality
Level (QL)
Quality
Level (QL)
Quality
Level (QL)
Quality
Level (QL)
Quality
Level (QL)
Mode 1) Priority
reference order
Mode 2) QL then
priority reference
order
Reference
Selector
Digital Phase
Locked Loop
(DPLL)