AT&T Syn248 SB35010 Installation And Configuration Manual page 94

Syn248 Installation and Configuration Guide
Probable Cause
The device may have been
configured on another
network.
Deskset cannot make or receive phone calls and the Deskset screen displays Synchronizing.
Probable Cause
The Deskset may have an
incompatible software
version.
A Syn248 device displays Host Not Found after a user attempts a software upgrade.
Probable Cause
The user attempted a
software upgrade with no
outside Internet connection.
Troubleshooting
Corrective Action
Power cycle the Deskset by unplugging the

power cord and plugging it back in.
If power cycling does not work, back up your

Deskset and reset to factory defaults.
a. Back up the Deskset. See
Restore Settings" on page
b. Unplug the LAN cable
c. Press the RESET button for at least five
seconds.
d. Restore your settings after the Deskset
restarts.
Corrective Action
Log on to the WebUI using the IP address of the

Deskset and update the software. See
Devices" on page 62.
Corrective Action
Ensure you have Internet connectivity and that

your connection to your Internet Service Provider
is operating normally.
Ensure your firewall is not blocking http requests.

Ensure that http requests are not being directed

to a firewall log-in page.
Ensure that your http requests are not being

routed through a proxy server.
93
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"Back Up and
58.
"Updating