On Sat, 8 Sep 2007 23:16:35 -0700 "Ted Mittelstaedt" <[EMAIL PROTECTED]> wrote:
> ... > However, the thing that most people (who don't work at telcos) do not > understand is that the telcos found very quickly that they cannot put > contention into an ATM network comprised of a DSL atm circuits for a > very simple reason. > > ... > SO, the cost of discarding a single 56 byte ATM cell means the ATM > cloud will have to get another 1400 bytes of data retransmitted > through it. > > It doesen't take a rocket scientist to see that introducing contention > into an ATM circuit carrying a DSL circuit will cause a massive > increase in traffic in the switch, and wipe out any gains from > contention. I don't know much about DSLAMS, but ATM switches have been able to drop whole AAL5 frames for a long time. Do DSLAMS really not have EPD/PPD? However the contention is done, it definitely happens in the UK. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
