Setting The Input Reference Selection Mode; Verifying The Input Reference - Symmetricom TSG-3800 Series User Manual

Operating the TSG-3800
Setting Up Input Reference Controls
Setting the number of time intervals, without incident, necessary to clear an
alarm
Setting two limits for MTIE
Setting two limits for frequency offset
On T1 or E1 X-Port modules:
Set termination
Set framing type
Set zero suppression
Set CRC
Set SSM mode

Setting the Input Reference Selection Mode

The TSG-3800 can choose input references using one of three modes: Priority,
SSM, and Best. Priority mode bases the reference selection on the port's
provisioned priority; secondary criteria is the SSM information. SSM mode selects
the reference based first on received or provisioned SSM, then on priority and
position. Best mode selects the reference based on a weighting derived from the
input stability calculations; secondary criteria are the priority and SSM information.
Refer to Selecting the Reference Selection
reference selection modes.

Verifying the Input Reference

The TSG-3800 automatically selects the input reference signal. Upon failure of the
input reference, the TSG-3800 selects the highest priority valid input providing that
AUTOSWITCH is on.
To verify the reference in use, check which Input module has its REF indicator
illuminated, or connect to the TSG-3800 and type:
REFERENCE
The following message appears:
->REFERENCE
The Current Reference is «input»
->
88 TSG-3800 User's Guide
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and press Enter.
Mode, on page 85, for a discussion of
12778474-002-2 Revision F – March 2004