Paradyne 9126-II, CSU, DSU, 9128-II manual Connectivity, Test Call

8. Troubleshooting

Connectivity

Connectivity is a proprietary method that determines whether the FrameSaver device at the other end of the frame relay PVC is active. This test stops automatically and can only be executed for circuit multiplexed PVCs.

To run a connectivity test on a link:

Main Menu → Test→ [Network PVC Tests/Data Port PVC Tests/

ISDN Call/PVC Tests]

Selecting Connectivity sends a frame to the FrameSaver unit at the other end of the PVC. A RndTrip Time(ms) message appears in the Result column when a response is received within 5 seconds, indicating that the FrameSaver unit at the remote end is alive (operational and connected), and the round trip (RT) time is shown in milliseconds (ms), with a resolution of 1 ms. If a response is not received within 5 seconds, No Response appears in the Result column.

Test Call

est Call tests the device’s ability to place a call. It allows an alternate means of controlling the activation or deactivation of an ISDN link. This test only appears for a FrameSaver device with a DBM that is configured to originate backup calls (typically, the remote site) and has its ISDN Link Status option set to Auto.

o place a test call:

Main Menu → Test→ ISDN Call/PVC Tests

When a test call is started, Active appears in the Status column. While the call is Active, the status of the call connection and the link appears in the Results column.

A Frame Relay Link Up message indicates that the required calls have been made and the link is successfully passing LMI data.

A Frame Relay Link Suboptimal message indicates that at least one call has been made on the link, the link is successfully passing LMI data, but the Maximum Link Rate configured in the ISDN Link Profile has not been

Tachieved for the link.

A Frame Relay Link Down message indicates that the call attempts were not successful.

NOTE:

Primary network data is not affected by a test call. If there is a network failure while a test call is active, the test call is terminated and the call is automatically converted to a backup call.

9128-A2-GB20-80 September 2002 8-25