NEC VisuaLink 128/384 User Manual page 141

VisuaLink 128/384 User Guide
Area Condition
Unable to connect to a
remote site
Network
If after everytime you try to
dial a call, the system
immediately ask you to
redial
If you can make calls to
some sites but not others.
NDA-24230 Issue 2.0
Check Item and Countermeasures
[When placing a call, the line immediately hangs up]
Make sure the network is connected.?
The line could be busy. Please try later.
Verify the line conditioning setting match that for the VL.
[Line disconnects a few seconds/minutes after placing a call]
The line could be busy. Please try later.
Remote equipment could be turned OFF.
Verify the number called.
[The line is disconnects during communication]
Failure could have occurred on the line, which has caused the line to
disconnect. Please try connecting again.
[Voice and picture are not received after connecting]
A line failure has occurred. Please disconnect and replace the call.
A communication protocol failure with the remote address has occurred.
Please disconnect, power OFF and ON the equipment to clear the
status. Please try connecting again after the status has cleared.
[There are random errors with the voice and picture]
If a line error or a equipment failure occurs during communication, noise
in audio and/or error in picture may occur. Please disconnect once and
reconnect.
[ISDN is not present]
Check the ISDN line connection. The VisuaLink has a S/T interface and
requires an NT12 to be connected between the VisuaLink and your ISDN
line unless the VisuaLink is connected to a PBX.
Make sure the ISDN cable to the system is securely attached.
SPID and/or ISDN number entered incorrect
Check the Local Line setting
Run a Local Line loopback from the maintenance settings.
[ISDN provisioning]
Need to confirm ISDN provision from the Teleco.
Chapter 9
Page 9-3