This MIB contains objects that are used to configure Uplink Tagging (ULT). Uplink Tagging is a term used to describe a feature that simplifies the setup and administration of networks where a service provider wants to use a unique VLAN per subscriber port. Ingress frames will get tagged with a VLAN and these tagged frame will be transmitted on the uplink port towards the WAN. In cases where the hardware implementation permits, multiple units can be interconnected together to form a 'Uplink Tagging Domain (ULT Domain)'. A ULT domain is defined as the set of interconnected Paradyne DSLAMs that share a common block of VLAN IDs. The maximum number of Paradyne DSLAMs that can be interconnected is implementation dependent. Generally, all DSLAMs in a ULT Domain will be configured with the same block of VLAN IDs. Each chassis/unit will be assigned a unique ULT Index within the ULT Domain. There are two parts of configuring Uplink Tagging: 1. Uplink Base VLAN Tag - This object specifies the beginning VLAN ID for a particular common block of VLAN IDs. This object will be defined as an enumeration whose values will depend on the number of port in a chassis/unit. 2. Uplink Tag Index - This object specifies the index within some block of VLAN IDs. Generally, this index can thought of a chassis/unit number as can be seen with the examples below.