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Administrator’s Guide for VP530 IP
Video
Phone
178
Ensure that the target firmware is applicable to the IP phone model.
Ensure that the current or the target firmware is not protected.
Ensure that the power is on and the network is available in the process of
upgrading.
Ensure the web browser is not closed and refreshed when upgrading the firmware
using the web user interface.
Check if you have configured your phone to obtain the time and date from the NTP
server automatically. If your phone is unable to access the NTP server, configure the time
and date manually.
During a call, you may experience poor audio, including intermittent voice, low volume,
echo or other noise. The root cause of audio anomalies can be difficult to diagnose.
Problems may occur simply because the users are seated too far out of
recommended microphone range and sound faint, or are seated too close to
sensitive microphones and cause feedback.
Intermittent voice is mainly caused by packet loss and jitter. Packet loss may due to
network congestion. Jitter is mainly due to message recombination of transmission
or receiving equipment, such as timeout handling, retransmission mechanism or
buffer under run.
Noisy equipment, such as a computer or a fan, may make it difficult for hear the
voice from the other party clearly. Turn off any other noisy equipment in the room
such as fans.
A line issue may also cause this problem. Disconnect the old line and redial the call
to see if another line provides better connection.
A remote phonebook is placed on a server, while a local phonebook is placed on the IP
phone flash. A remote phonebook can be used by everyone that can access the server,
while a local phonebook can only be used by a specific phone itself. A remote
phonebook is always used as a central phonebook for a company. That is, every stuff in
the company can load this phonebook and each time they are trying to open a remote
phonebook, the data is passed real-time from the certain server.
Summary of Contents for VP530 IP
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Page 4: ......
Page 12: ......
Page 111: ...Configuring Basic Features 99...
Page 153: ...Configuring Advanced Features 141...
Page 171: ...Configuring Security Features 159...
Page 182: ...Administrator s Guide for VP530 IP Video Phone 170 Phonebook on page 266...
Page 183: ...Resource Files 171...
Page 194: ...Administrator s Guide for VP530 IP Video Phone 182 3 Click OK to confirm the resetting...
Page 195: ...Troubleshooting 183...
Page 344: ...Administrator s Guide for VP530 IP Video Phone 332...