Troubleshooting; Diagnosis Flows - Avaya Communication Server 1000 Installation And Commissioning Manual

Troubleshooting WLAN IP Telephony installations

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 52: Typical call-related issues
Issue
Unable to place a call Network
IP phone resetting
Call disconnects or
drops during a
conversation
232 Avaya WLAN IP Telephony Installation and Commissioning
Type of issue
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
Product IP, analog, or digital phone: Phone configuration Dial
plan
Network IP connectivity to Signaling server Network
congestion
Product Incorrect phone configuration
Network Intermittent network congestion that affects the
keep-alive
Product Signaling issues Incorrect configuration
Check for
November 2010