Cisco Systems 7690 Manual De Usuario

force a firmware upgrade from Cisco CallManager on to the phone. Anytime a 
phone has to load a new image, it has to restart itself and re-register with 
Cisco CallManager using the new image

However, if users report that their phones appear to be resetting during calls or 
while idle on their desk, you should investigate the cause. If the network 
connection and Cisco CallManager connection are stable, the Cisco IP Phone 
should not reset on its own.

Typically, the cause of the phones resetting can be categorized by problems 
connecting to the Ethernet network or to Cisco CallManager. These sections can 
help you identify the cause in your network:

Verify that the Ethernet connection to which the Cisco IP Phone is connected is 
up-and-running. For example, check if the particular port or switch to which the 
phone is connected is down.

Intermittent network outages affect data and voice traffic differently. Your 
network might have been experiencing intermittent outages without detection, but 
data traffic can resend lost packets and verify packets are received and 
transmitted.

However, voice traffic cannot recapture lost packets. Rather than retransmitting a 
lost network connection, the phone resets and attempts to reconnect its network 
connection.

Therefore, if you are experiencing problems with the voice network, you should 
investigate whether an existing problem is simply being exposed at this point.