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To troubleshoot a problem with Modem connection follow the points below:

 

1. On the Local always display the 'Remote Users Attached List' which is displayed by choosing 'View Connected Users' from the Remotes menu. This will provide useful information about the Local's connection status.

 

2. On the Local always have a screen which shows the 5 SpecView variables:

SpecView.Time

SpecView.GoodComms

SpecView.CommsErrors

SpecView.CommsErrorCode

SpecView.CommsErrorItem

SpecView.CommsErrorDescription

This will provide information about the instrument data coming into the Local, because unless the Local is able to reliably access the instrument data, then the Remote will not be able to request this data from the Local.

 

3. Ensure that this is a supported Modem

 

4. Check the version of TAPI installed on your PC

 

5. Ensure HyperTerminal can make a successful connection.

 

6. Performance:

The transfer rate on the Remote (Rx and Tx in kb/sec) is shown in the status line at the bottom of the SpecView32 screen. On the Local you will see the transfer rate on the Remotes->View Connected Users screen.

 

If the transfer rate/throughput between Local and Remote is not as quick as expected, then this is normally caused by modems negotiating a low baud rate, due to compatibility or line quality. Try re-dialling or replacing one or both of the modems.

 

7. Resends high:

On the Remote the resends are shown as a percentage on the status bar at the bottom of the SpecView32 screen e.g. Res:30.00%

On the Local the resends are shown as a packet count on the Remotes->View Connected Users screen e.g. Res20

 

High resends such as 20% or more could be due to a very bad line or a modem hardware issue.

 

Redial to retry the connection. If there is still a high resend rate then prove that the modems are OK by using HyperTerminal to send/receive a large text file. Use the Zmodem protocol to send a large file (say 20Mb or more) and watch the Retries which indicate failure to send/receive. If HyperTerminal reports problems then suspect that there is a modem issue. If HyperTerminal shows no issue then contact your SpecView Representative.