Myth

Reality

1. DMT has higher consumption
   than CAP.

1. For equivalent rates CAP requires more power than DMT.

1. DMT was intended for
   Video on Demand (VoD)
   and has been made obsolete
   by Internet access.

1. DMT is very well suited for Internet support. The ANSI standard explicitly addressed data access. The upstream rate was chosen to reflect the 10:1 ratio that is optimum for Internet traffic.

1. CAP invented rate adaptation.

1. DMT has always been rate adaptive, takes it for granted,
   and implements it in a highly flexible and elegant way.
   Indeed, the coarse granularity of CAP (steps of ~300 kbps
   and no downstream rates of less than 640 kbps)
   renders its rate adaptation essentially useless
   for rural low-rate/long-reach applications. In contrast
   DMT steadily adapts in 32 kbps steps to support
   optimum rates on all loops.

1. Performance is equivalent.

1. DMT is demonstrably more robust and has much better performance-delivering higher rates, much longer reach, or both.

1. DMT is heavily patented
   or inaccessible.

1. DMT is defined in an open international standard
   mandating fair access. Many manufacturers have
   independently developed their own solutions.
   It is the CAP technology has remained proprietary
   and with only one supplier.

1. DMT is less available than CAP.

1. Solutions designed to the ANSI standard are available now
   from several suppliers: there is only source of CAS chipsets,
   and this will ot comply with proposed future definition.