Chapter 6: Troubleshooting
Limited access during failover
One or more telephone system servers provide your phone with its connectivity, features, and
functionality. If a disconnect or switch from one server to another occurs, your phone goes into
"failover" mode to keep it operating while alternate server resources are established. Depending
on the server your phone is on, a Failover icon may appear on the top display line to notify you
that failover is in effect.
Failover has different stages. For example, while your phone transitions to a new server it is in
“limbo” and functionality may be limited. Then when the alternate server is active, your phone
assumes the functionality available on that server, which may not be the same as your original
server. When the original server is restored, your phone transitions back (failback) and
functionality may again be limited during the transition. When your phone is back on the original
server, normal functionality is restored. Failover and failback are automatic; you have no control
over failure mode.
Keep in mind that during failover certain features may not be available and telephone functionality
may be limited. Check the softkeys at the bottom of the display to determine the actions you can
take during failover; also try the Phone button to display the Home screen for possible actions.
Important:
Do not log your telephone off during failover or until normal service is restored on your original
telephone server. Logging off during failover, during transition to or from an alternate server, or
while your phone is active on an alternate server may cause your phone to become
inoperable.
The following conditions apply when your telephone is in failover mode:
• Messages like “Acquiring service” (if telephone registration has not completed), “Link
recovery,” “Limited phone service” (if the telephone is unable to log in to any of the servers),
and “Calls may be lost ” may inform you of a failover situation.
• If you are on a call when failover occurs, that call will remain active. You cannot initiate new
calls while your phone transitions to the alternate server.
• Certain softkeys may not display and their related functions may be unavailable until
transition to the alternate server is complete.
• Call connection may take longer than usual.
• During the transition to a new server, any active conference calls, call transfers, and held
calls may be dropped. Incoming calls may not reach you; such calls may go to voice mail.
October 2019 Using Avaya 9601 IP Deskphone SIP 89
Comments on this document? infodev@avaya.com
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