Verify that the system is running Communication Manager Release 1.3 or later. Release 1.3 or later is required on all nodes that participate in SBS calls. The nodes can be originating, tandem, and terminating.

1. Enter display system-parameters customer-options.

2. Scroll through the Optional Features screens to find the Maximum Administered IP Trunks field.

   This field must be greater than 1 and include enough trunks for SBS trunk group use.

3. Scroll through the screens to find the IP Trunks field.

4. Set the IP Trunks field to y.

5. Scroll through the screens to find the QSIG Optional Features screen.

6. Set the Basic Call Setup field to y.

7. Set the Basic Supplementary Services field to y.

8. Select Enter to save your changes.

   Note:

   Other QSIG options might need to be activated, depending on your feature functionality requirements.

Verify port and SBS trunk capacities.

1. SBS Extensions count against the pool of available ports in the same manner as Administered Without Hardware (AWOH) extensions.

2. Consider whether SBS trunks that you add to an existing system increase traffic on the PSTN trunks. SBS trunk group members count against the pool of available IP trunks. SBS bearer calls usually use the same trunks as normal local and/or toll PSTN calls. For implementation of the SBS feature, you might have to increase the quantity of trunks to the PSTN.