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.