Dan, that was a good observation, although it needs some further definition. It 'could' support the stipulated speeds at, or near, 1.5 Mbps, let's say, on the loop side. But a problem with this picture could come into focus on a statistical basis, if the combination of CPE*-loop-edge-WAN (Internet) resources are not tuned properly.
If the loop activity is sufficient to overwhelm the high speed side of the DSL access multiplexer (DSLAM) facing the routers, say, (AND/OR) if the router resources and the uplink to the Internet are not adequate, there will undoubtedly be contention on the ports facing the Internet side (next tier up the Internet chain), which could present throttling on the low speed DSL side. This would have the effect of reducing the realized throughput levels on the loop, itslef, and therefore the premises CPE. (* CPE = Customer Premises equipment.)
So, while the argument in favor of DSL does hold true on the access portion of the equation, alone, it still depends on network tuning and actual traffic loading for it to be realized.
HTH, and Regards, Frank C. |
