Por lo visto el método de combinar varios canales para conseguir mayor BW, es posible:
http://en.wikipedia.org/wiki/Channel_bonding Cita: Similarly, multiple DSL lines can be bonded to give higher bandwidth; in the United Kingdom, ADSL is sometimes bonded to give for example 512kbit/s upload bandwidth and 4megabit/s download bandwidth, in areas that only have access to 2 megabit/s bandwidth.
ver
http://en.wikipedia.org/wiki/Link_aggregation
salu2