On Fri, Apr 21, 2006 at 10:36:27AM +0200, Toni Mueller wrote: > Hello, > > On Wed, 19.04.2006 at 12:57:16 +0100, tony sarendal <[EMAIL PROTECTED]> wrote: > > On 19/04/06, Toni Mueller <[EMAIL PROTECTED]> wrote: > > > Anyway, if someone of you comes across good E3 cards, please drop me a > > > note. Otherwise, try to persuade your carrier to give you Ethernet. > > > > What about using Ethernet to T3/E3 converters instead ? > > That way you don't need funky cards in the openbsd box. > > unfortunately, there appears to be no standard line encoding for E3 > lines, so if you want to have E3-Ethernet converters, you must use them > in pairs, on both ends of the line. This rules out having eg your E3 > terminating somewhere inside an STM1/4/... trunk on the other side, but > many carriers only offer this kind of setup. So you're almost > guaranteed to have a non-working line if they have, say, a Cisco 12000 > on their end where your line terminates inside a trunk, and you have > the simple fiber with only that one E3 incorporated. I've been told > that the situation improves quite a bit when you have STM1 instead: > There, a standard exists, but it doesn't appear to be widely tested if > it actually works.
FWIW: if you're in Qwest-land, you can now get up to 20mbps delivered as copper ethernet. They use a bucket of bonded pairs to do it, but it can supposedly be done. I looked at it a while ago, but it was somewhat pricey when I only needed 3mbps. ;-) Anything higher than 20mbps seems to require fibers. -- adam
