Performing Manual D-Channel Switchover in NFAS Group

If an NFAS group is configured with two D-channels (Primary and Backup), you can do a manual switchover between these D-channels.

To manually switchover from active to standby D-channel:
1. Open the NFAS Group & D-Channel Status page (Monitor menu > PSTN Status tab > NFAS Group & D-Channel Status).
2. Select the required NFAS group, and then click the Switch Activity button.
The Switch Activity button is unavailable (i.e, grayed out) if a switchover cannot be done due to, for example, alarms or unsuitable states.
This feature is applicable only to T1 ISDN protocols supporting NFAS, and only if the NFAS group is configured with two D-channels.