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Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)
© 2000 Cisco Systems, Inc. 29
There should be one Warning and one Error message for each phone that resets. In this case, the
problem is often that the phone cannot keep its TCP connection to the Cisco CallManager alive,
so the Cisco CallManager resets the connection. This may be because a phone was turned off or
there may be a problem in the network. If this is an intermittent problem, it may be useful to use
Microsoft Performance to record phone registrations.