User manual

51
Maintenance and Upgrades 10
Testing the network connection
The ping command can be used to check the connection between two IP addresses. This allows you to test
whether a unit is active in the network.
– Open the DOS command prompt.
– Type ping followed by the IP address of the unit.
If the unit is found, the response appears as Reply from ..., followed by the number of bytes sent and the
transmission time in milliseconds. Any other response indicates that the unit cannot be accessed via the
network. Possible causes:
• The unit is not properly connected to the network. Check the cable connections in this case.
• The unit is not correctly integrated into the network. Check the IP address, subnet mask and, if necessary,
the gateway IP.
Device reset
The reset button can be used to reset the unit to its original factory settings. Any changes in the settings will
be overwritten by the factory defaults. This may be necessary, for example, if the unit has invalid settings that
prevent it from functioning as desired.
Warning!
All configured settings will be discarded during a reset. If necessary, back up the current settings using
the Download button on the configuration page entitled Software Update (see page 35 or page 79).
Before starting the firmware upload, be sure that you have selected the correct upload file! Uploading the
wrong files can result in the unit no longer being addressable, requiring it to be replaced. Do not interrupt
the firmware installation for any reason! Interruption will damage the Flash EPROM. This can likewise
result in the unit no longer being addressable, requiring it to be replaced.
Note
After a reset, the unit can only be addressed via the factory default IP addresses. The IP address can be
changed as described in the chapter entitled Installation (see page 13).
– If necessary, back up the current settings using the Download button on the configuration page entitled
Software Update.
– Disconnect the unit from the power supply.
– Use a pointed object to press the reset button. All settings will revert to their defaults.
– Change the IP address of the unit as necessary.
– Configure the unit to meet your requirements.
Repairs
Warning!
Never open the casing of a 7700 Series unit. The unit does not contain any parts that you can repair or
replace.
Contact DVTel Technical Support is any repairs are necessary.