5. Troubleshooting - NEC UNIVERGE SV9100 Manual

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It is highly recommended that any VPN hardware used for VoIP has the facility to prioritise
voice traffic.
1.5

5. Troubleshooting

This section aims to provide some helpful tips to perform Voice Over IP troubleshooting.
The first step in resolving any issues would be to read through the relevant manuals/documentation
and refer to any example configurations. If you are unable to resolve the issue using the
documentation it may be helpful to use the tools outlined below.
5.1 PING
This is one of the most useful tools available to troubleshoot IP connectivity. PING is a standard
component of Microsoft Windows and is also implemented in the SV9100 SIP MLT IP Phones. PING
sends a small IP packet to a specified destination and waits for a response back.
It should be possible to ping system IP Phones, the GCD-CP10, GPZ-IPLE and any other devices on
the network. When you send a ping, you wait for a reply. If you do not receive a reply, the ping
response "times-out". This indicates a connection problem.
The ping traces below show these two conditions:
Successful PING