Demand test descriptions and error codes - Avaya Support

SYNC (Port Network Synchronization)
The change synchronization command allows primary and secondary references to be
administered per cabinet.
Use status synchronization to show the current synchronization reference per cabinet.
Use display synchronization or list synchronization to show the primary and/or
secondary synchronization references that are administered.
Other commands associated with Synchronization Maintenance are disable
synchronization-switch and enable synchronization-switch. These commands
disable the ability of Synchronization Maintenance to switch between synchronization
references and to enable this switching ability, respectively. Use set synchronization only
after synchronization has been disabled, to manually switch to a specific synchronization
reference. Use set synchronization to help diagnose synchronization problems by forcing
a specific reference (DS1, UDS1, or Tone-Clock) to be the system synchronization reference to
determine if a specific reference is providing a valid timing signal.
Troubleshooting Approach
Slip errors are the primary symptom associated with being un-synchronized.
A correct Synchronization plan for the network keeps the systems within the network
transmitting data at approximately the same rate to avoid situations where:
● One system transmits data at a rate faster than another system can receive the data (in
which case data is lost).
● One system transmits data at a rate slower than another system expects to receive data
(in which case data is repeated).
Either of these situations, data being lost or repeated, is a slip.
When troubleshooting synchronization problems when slips are the primary error log entry
indications of a synchronization problem, requires that the problem be isolated to:
● A problem outside of the switch (That is, the switch is not properly synchronized to the rest
of the network.)
● A problem internal to the switch
DS1 and UDS1 circuit packs can be administered with slip detection enabled using the Slip
Detection field set to y on the add ds1 or change ds1 administration screens (See
Administering Avaya Aura Communication Manager - 555-233-506). All DS1 and UDS1
circuit packs administered as slip enabled are counted in the following algorithm:
When over half of the DS1 and UDS1 circuit packs administered as slip enabled are
experiencing slips, and the primary or secondary synchronization reference is the current
synchronization reference, synchronization will try the other administered synchronization
reference.
Issue 5 May 2009 897