User's Manual 450 Document #: LTRT-89730
Mediant 3000
22.7.3 Creating an NFAS-Related Trunk Configuration
The procedures for creating and deleting an NFAS group must be performed in the correct
order, as described below.
 To create an NFAS Group:
1. If there’s a backup (‘secondary’) trunk for this group, it must be configured first.
2. Configure the primary trunk before configuring any NFAS (‘slave’) trunk.
3. Configure NFAS (‘slave’) trunks.
 To stop / delete an NFAS Group:
1. Stop or delete (by setting ProtocolType to 0, i.e., 'None') all NFAS (‘slave’) trunks.
2. Stop or delete (by setting ProtocolType to 0, i.e., 'None') the backup trunk if a backup
trunk exists.
3. Stop or delete (by setting ProtocolType to 0, i.e., 'None') the primary trunk.
Notes:
• All trunks in the group must be configured with the same values for trunk
parameters TerminationSide, ProtocolType, FramingMethod, and LineCode.
• After stopping or deleting the backup trunk, delete the group and then reconfigure
it.
22.7.4 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 (Status & Diagnostics tab > VoIP
Status menu > NFAS Group & D-Channel Status).
2. Select the required NFAS group, and then click the Switch Activity button.
Notes:
• 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.
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