AudioCodes Mediant 2000 User Manual page 234

For example, if four T1 trunks on a device are configured as a single NFAS group with
Primary and Backup T1 trunks that is used with a DMS-100 switch, the following
parameters should be used:
NFASGroupNumber_0 = 1
NFASGroupNumber_1 = 1
NFASGroupNumber_2 = 1
NFASGroupNumber_3 = 1
DchConfig_0 = 0
DchConfig_1 = 1
DchConfig_2 = 2
DchConfig_3 = 2
If there is no NFAS Backup trunk, the following configuration should be used:
ISDNNFASInterfaceID_0 = 0
ISDNNFASInterfaceID_1 = 2
ISDNNFASInterfaceID_2 = 3
ISDNNFASInterfaceID_3 = 4
ISDNIBehavior = 512
;ISDNNFASInterfaceID coniguration above
NFASGroupNumber_0 = 1
NFASGroupNumber_1 = 1
NFASGroupNumber_2 = 1
NFASGroupNumber_3 = 1
DchConfig_0 = 0
DchConfig_1 = 2
DchConfig_2 = 2
DchConfig_3 = 2
18.1.6.3.3 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:
SIP User's Manual
;Primary T1 trunk
;Backup T1 trunk
;B-Channel NFAS trunk
;B-channel NFAS trunk
;This parameter should be added because of
;Primary T1 trunk
;B-Channel NFAS trunk
;B-Channel NFAS trunk
;B-channel NFAS trunk
•
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.
234
Mediant 2000
Document #: LTRT-68814