ADTRAN 1204002L2, TSU IQ+ user manual Applications

Chapter 4. Applications

A TSU IQ+ with multiple PVCs to multiple sites can also originate a call to one site during an outage and restore connection for PVCs to that destination. With all DBU cards except for the PRI card, you can make only one call at a time. The other PVCs to other sites in this scenario will be inactive. If you have a PRI card you can originate or answer up to 23 calls.

Information entered into the PVC CONFIGURATION table (see Table

4-2 on page 4-13) marks PVCs for DBU operation. The key element in each entry of the table is the DBU DLCI. For each PVC connecting two sites for DBU operation, the DLCI field represents the PVC DLCI at the local UNI and the DBU DLCI represents the PVC DLCI at the remote site UNI. The TSU IQ+ uses this information in the outbound side to change the PVC DLCI so the far end DTE device receives frames on the DBU PVC addressed in the same manner as when the frame relay circuit is operational. For PVCs not used for DBU operation, leave the DBU PHONE NUMBER field set for a null entry. Enter a space character from the VT-100 terminal to create a null entry for DBU PHONE NUMBER field.

The DBU PHONE NUMBER information is only required for the TSU IQ+ originating the call.

Dial backup application examples are provided in the following sections.

The configuration selections given may need modification based on your network configuration.

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