Alarms; Synchronization Status Messages (Ssms); Ansi Ssm Quality Level Definitions - Symmetricom TimeProvider 1000 User Manual

Alarms

The TimeProvider uses alarms to notify you when certain conditions are deteriorating
below user-specified levels. These alarms are indicated by shelf and card status
lamps (LEDs) and by TL1 messages reported over the serial/EIA-232 or LAN
communication ports. In addition, the input panel has a connector that provides
contact closures to activate external alarms.
You can provision the alarm level for most alarms to one of the following levels:
non-reportable (NR), non-alarm event (NA), minor (MN), major (MJ), or critical (CR).
Alarms related to the inputs are special cases; you can only provision input alarms
for minor, major, or critical. To help prevent spurious or transient input alarms, a
delay timer (FLTDELAY) allows you to provision a waiting period that starts after the
alarm condition occurs; the alarm is set at the end of the period. A similar timer
(CLRDELAY) clears the alarm after the alarm condition is no longer present.
Recommendation: To prevent Non-Service Affecting LOS
alarms, Symmetricom recommends that you provision unused
inputs to the Disabled state.
For more information on connecting alarms, see
page 63. For information on provisioning alarm levels, see
Levels, on page 114.

Synchronization Status Messages (SSMs)

The TimeProvider supports input and output SSMs. SSMs provide a method for
providing clock quality information to any equipment that uses synchronization
inputs. Table 1-4
with each value.
associated with each value.
Table 1-4. ANSI SSM Quality Level Definitions
Stratum 1 Traceable
Synchronized – traceability unknown
Stratum 2 traceable
Transit Node traceable
Stratum 3E traceable
Stratum 3 traceable
097-58001-02 Revision C – August 2005
describes the ANSI SSM values and the traceability associated
Table 1-5 describes the ITU SSM values and the traceability
Description
Chapter 1 Overview of the TimeProvider
Making Alarm Connections, on
Provisioning the Alarm
Quality Level Abbreviation
1 PRS
2 STU | UNK
3 ST2 | TYPE II
4 TNC | TYPE I
5 ST3E | TYPE III
6 ST3 | TYPE IV
TimeProvider User's Guide
Alarms
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