Priority Quality Levels; Crc State - Symmetricom TimeProvider 5000 User Manual

Chapter 4 Provisioning
Provisioning the Programmable E1/T1 Inputs
SSM Bit
The SSM bit indicates which bit of the framing signal carries the SSM.
Note:
will allow the user to set the SSM bit parameter for T1 signals,
but it will have no effect.
Table 4-17. Priority Quality Levels
Priority
Quality Level
(PQL)
1
2
3
4
5
6
7
8
9
15

CRC State

CRC is a cyclic redundancy checking protocol which is applicable for E1 signals.
CRC must be enabled for the input port in order to use SSM with the CAS or CCS
framing types for that port.
Note:
allow the user to enable CRC for an input port configured for
T1, but it will have no effect.
320 TimeProvider 5000 User's Guide
The SSM bit is not applicable to T1 signals. The TP5000
DS1 (T1)
E1 SSM
SSM
0x04 0x02
0x08 0x00
0x0C 0x04
0x0C 0x04
0x78 0x04
0x7C 0x08
0x10 0x0B
0x22 0x0F
0x30 0x0F
--- ---
CRC is not applicable to T1 signals. The TP5000 will
Description
Stratum 1/PRS/PRC
STU, Stratum Unknown (presumed ST1)
Stratum 2/Type II
Type I
Transit Node/Type V
Type III/Stratum 3E
Type IV/Stratum 3
G.813OPT3/SMC
DUS, Do not Use for Sync
Did not receive valid SSM
098-00028-000 Revision F – May, 2012