Input Frametypes: Ssm-States And Ssm-Values - Symmetricom TimeProvider 5000 User Manual

Table 4-7. Input Frametypes: SSM-States and SSM-values
Selected
Input SSM State
Signal
1544kHz
D4
ESF
Enable
SSM-Value
The "ssm-value" parameter that is used with the "set input" command corresponds
to the Priority Quality Level (PQL) values for reference input signal types, as shown
in Table 4-8. The PQL is a representation of traceability for the signal presented at
the input ports, where a PQL value of 15 represents an invalid SSM. If SSM is
disabled for an input port, then the TP5000 will use the user-assigned SSM-value
(PQL) for that input port.
Note:
reference while clock was in normal lock state.
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.
098-00028-003 Revision A – June, 2011
SSM-value
Disable User-value
Enable User-value
Disable User-value
Enable
Disable
with valid SSM
with no SSM
with unsupported
SSM code
with STU code
with DUS code 15 (DUS)
had ST2 SSM Input SSM
code, but now has
no SSM
SSM during bridging will be the last SSM value of input
The SSM bit is not applicable to T1 signals. The TP5000
Provisioning the Programmable E1/T1 Inputs
Current Disqualify Signal
Based on SSM?
Allow
Allow
Allow
15 Disqualify
15 Disqualify
15 Disqualify
15 Disqualify
2 Allow
9 (STU) Disqualify
Disqualify
Allow
TimeProvider 5000 User's Guide 267
Chapter 4 Provisioning
Input
SSM-value
User-value
User-value
User-value
OSC (holdover)
OSC (holdover)
OSC (holdover)
OSC (holdover)
2 (STU)
OSC (holdover)
OSC (holdover)
Input SSM