Symmetricom TimeProvider 5000 User Manual

320 TimeProvider 5000 User’s Guide 098-00028-000 Revision F – May, 2012
Chapter 4 Provisioning
Provisioning the Programmable E1/T1 Inputs
SSM Bit
The SSM bit indicates which bit of the framing signal carries the SSM.
Table 4-17. Priority Quality Levels
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: The SSM bit is not applicable to T1 signals. The TP5000
will allow the user to set the SSM bit parameter for T1 signals,
but it will have no effect.
Priority
Quality Level
(PQL)
DS1 (T1)
SSM
E1 SSM Description
1 0x04 0x02 Stratum 1/PRS/PRC
2 0x08 0x00 STU, Stratum Unknown (presumed ST1)
3 0x0C 0x04 Stratum 2/Type II
4 0x0C 0x04 Type I
5 0x78 0x04 Transit Node/Type V
6 0x7C 0x08 Type III/Stratum 3E
7 0x10 0x0B Type IV/Stratum 3
8 0x22 0x0F G.813OPT3/SMC
9 0x30 0x0F DUS, Do not Use for Sync
15 --- --- Did not receive valid SSM
Note: CRC is not applicable to T1 signals. The TP5000 will
allow the user to enable CRC for an input port configured for
T1, but it will have no effect.

Symmetricom TimeProvider 5000 Specifications

General

Brand	Symmetricom
Model	TimeProvider 5000
Category	Server
Language	English