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098-00028-000 Revision F – May, 2012
TimeProvider 5000 User’s Guide 319
Chapter 4 Provisioning
Provisioning the Programmable E1/T1 Inputs
If input SSM for a port has a worse quality level than the IOC oscillator - Type II
for Rb IOC and Type 1 for Quartz IOC -the input port will be disqualified
If SSM is enabled for an input port and the signal does not support SSM or is not
sending a valid SSM, then the input will be disqualified. The SSM-value for the
input will be set to 15 (invalid). If there is not another qualified reference to switch
to, the system will go to holdover.
If any of the following conditions are detected at an input port, that input signal
will be disqualified: Loss of signal (LOS), Out-of-framing (OOF), or Alarm
indication signal (AIS)
illustrates some example situations. The Output PQL values shown
assume that no other references are available
Table 4-16. Input Frametypes: SSM-States and SSM-values
PQL-Value
The “PQL 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
. 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 PQL value for
that input port.
Selected
Input
Signal
SSM State
Current
PQL value
Disqualify Signal
Based on SSM?
Output
PQL value
1544kHz
Disable
User-value
Allow
User-value
Enable
15
Disqualify
OSC (holdover)
D4
Disable
User-value
Allow
User-value
Enable
15
Disqualify
OSC (holdover)
ESF
Disable
User-value
Allow
User-value
Enable
with valid SSM
Input SSM
Allow
Input SSM
with no SSM
15
Disqualify
OSC (holdover)
with unsupported
SSM code
15
Disqualify
OSC (holdover)
with STU code
2 (STU)
Allow
2 (STU)
with DUS code
9 (DUS)
Disqualify
OSC (holdover)
Note:
SSM during bridging will be the last SSM value of input
reference while clock was in normal lock state.
Summary of Contents for TimeProvider 5000
Page 12: ...Table of Contents 12 TimeProvider 5000 User s Guide 098 00028 000 Revision F May 2012 ...
Page 16: ...List of Figures 16 TimeProvider 5000 User s Guide 098 00028 000 Revision F May 2012 ...
Page 20: ...List of Tables 20 TimeProvider 5000 User s Guide 098 00028 000 Revision F May 2012 ...
Page 56: ...56 TimeProvider 5000 User s Guide 098 00028 000 Revision F May 2012 Chapter 1 Overview Alarms ...
Page 534: ...Index W W 534 TimeProvider 5000 User s Guide 098 00028 000 Revision F May 2012 ...