Mediant 2000 SIPMediant 2000 SIP User’s Manual 142 Document #: LTRT-72504To define an explicit Interface ID for a T1 trunk (that is different from the default), use thefollowing parameters:• ISDNBehavior_x = 512 (x = 0 to 7 identifying the Mediant 2000 physical trunk)• ISDNNFASInterfaceID_x = ID (x = 0 to 255)Note 1: Usually the Interface Identifier is included in the Q.931 Setup/ChannelIdentification IE only on T1 trunks that doesn’t contain the D-channel. Callsinitiated on B-channels of the Primary T1 trunk, by default, don’t contain theInterface Identifier. Setting the parameter ‘ISDNBehavior_x’ to 2048’ forcesthe inclusion of the Channel Identifier parameter also for the Primary trunk.Note 2: The parameter ‘ISDNNFASInterfaceID_x = ID’ can define the ‘Interface ID’ forany Primary T1 trunk, even if the T1 trunk is not a part of an NFAS group.However, to include the Interface Identifier in Q.931 Setup/ChannelIdentification IE configure ‘ISDNBehavior_x = 2048’ in the ini file.8.4.2 Working with DMS-100 SwitchesThe DMS-100 switch requires the following NFAS Interface ID definitions:• InterfaceID #0 for the Primary trunk• InterfaceID #1 for the Backup trunk (refer to the note below)• InterfaceID #2 for a 24 B-channel T1 trunk• InterfaceID #3 for a 24 B-channel T1 trunk• Etc.Note: In the current version, the Mediant 2000 doesn’t support the DMS-100 Backup trunk.Therefore, InterfaceID #1, should not be used.For example, if four T1 trunks on a Mediant 2000 are configured as a single NFAS group that isused with a DMS-100 switch, the following parameters should be used:ISDNNFASInterfaceID_0 = 0ISDNNFASInterfaceID_1 = 2ISDNNFASInterfaceID_2 = 3ISDNNFASInterfaceID_3 = 4NFASGroupNumber_0 = 1NFASGroupNumber_1 = 1NFASGroupNumber_2 = 1NFASGroupNumber_3 = 1DchConfig_0 = 0 ;Primary T1 trunkDchConfig_2 = 2 ;24 B-channel NFAS trunkDchConfig_3 = 2 ;24 B-channel NFAS trunkDchConfig_4 = 2 ;24 B-channel NFAS trunk
