To test your ISDN line is working you can dial a standard phone line or your cell-phone number. If the call is successful this verifies the line is active. To verify ISDN data is being sent you can:
•Dial a codec you know is connected to an active ISDN line, e.g. another codec in your network or a Tieline test codec.
•Dial the test ISDN data number provided by your Telco (when available).
•Create a program and perform a loopback test by dialing out on the main ISDN number and receive the call on the auxiliary ISDN number. (Note: To create a loopback program create a 2 x Mono or Stereo Peer-to-Peer program and configure a dial only audio stream using your main ISDN number. For the second audio stream create an answer only audio stream connection configured for ISDN. If you dial the connection and can hear the audio you are sending on the return B channel, you have confirmed ISDN data is being sent successfully.
•If you dial using a loopback program and a "disconnect" message appears, you may have the incorrect Line Type configured. Change the Line Type setting and this should hopefully resolve the issue.
On-Demand ISDN Services
If Sync appears for approximately 60 seconds when you connect an ISDN line to the codec and then disappears, or if Sync does not appear and you know you are connected to an active ISDN interface, then the line may have ‘On-demand’ enabled by your Telco. To test this you can dial a codec on an ISDN line known to be operational. Dial over ISDN and if Sync appears after connecting it indicates the service has now been activated. Disconnect and then dial again. If this dial is successful ‘On Demand’ is enabled. We recommend you contact your network service provider and get them to disable ‘On Demand’ to circumvent any possible connection issues.
