AT&T Synapse Installation Manual page 162

Symptom
A Synapse device displays
Host Not Found after a user
attempts a software upgrade.
A Synapse device displays an
error message other than
Host Not Found after a user
attempts a software upgrade.
Troubleshooting
Synapse Installation Guide
Probable Cause
The user attempted a
software upgrade with no
outside Internet connection.
The device encountered an
unexpected problem.
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.
1. Disconnect the power to the device, wait a few minutes,
then reconnect the power and try the upgrade process
again.
2. If the error message persists, contact the person who
installed your system.
3. If your installer is unavailable, visit our web site at
www.telephones.att.com/smb
1 (888) 916-2007.
1 (888) 883-2474
161
Display Messages
or call
In Canada, call
.