Nortel Networks NN43001-504 - Manual (Page 196)

196 Appendix B Troubleshooting WLAN IP Telephony installations
• EAP or MAC Reauthentication interval
• TKIP MIC Failure Holdoff Time
Troubleshooting
Ensure that the WLAN IP Telephony and PBX product mix lines up with the
compatibility matrix in the current Product Bulletin.
If the site does not conform, it is not classified as a supported installation.
Diagnosis flows
The following sections provide information about the troubleshooting
process for different types of issues.
Call or signalling-related issues
Signaling issues are not normally a result of an issue with the IP data
network. However, if an IP data network is congested or configured
incorrectly, signaling traffic can be affected. Because call signaling is
normally a combination of H.323 (TCP)- and Reliable User Datagram
Protocol (RUDP) (IP Sets)-based traffic, the packets usually reach the
destination, barring any IP network configuration issues. However, these
packets could drop and cause excessive retransmission and delay. As an
example, the IP phones keep-alive communication with the signaling server
can be affected.
Table 24
Typical call-related issues
Issue Type of
issue Check for
Network IP phone:
IP connectivity to Signaling server
IP connectivity issues to other IP sets
Excessive congestion or retransmissions
Analog or digital phone:
IP trunk connectivity issues Unable to place
a call
Product IP, analog, or digital phone:
Phone configuration
Dial plan
Network IP connectivity to Signaling server
Network congestion IP phone
resetting
Product Incorrect phone configuration
Network Intermittent network congestion that affects
the keep-alive Call disconnects
or drops during a
conversation
Product Signaling issues
Incorrect configuration
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
NN43001-504 01.02 Standard
Release 5.0 15 June 2007
Copyright © 2004-2007, Nortel Networks
.