On Thu, Nov 25, 2004 at 09:59:58PM +1100, Bob Purdon arranged a set of bits into the following: > > >An E1 termination can require local power. In that case you will have to > >provide backup power to it. Some get their power from the central office, > >in which case this is not a problem. > > In our neck of the woods (Australia) the dominant carrier typically > deploys one of two solutions: > > (a) E1/PRI over copper - I haven't seen this for a long while, but I > believe they're line powered; The one we got installed today (yes, really) at work wasn't line powered, another bloody wall-wart to go with the others. However that was shipped as an OnRamp 30 (ie a euro PRI), whereas the E1 data link is also locally powered, but with power coming from the curb.
We're just outside the Melbourne CBD (next to melb-uni if people care) and now have 2 E1's, 1 data, 1 ISDN voice, and about another 1/2 dozen analog trunks. (Plus the two ADSL links) > (b) E1/PRI over fibre - see these all the time, and the transmission > rack they install at the customer site includes batteries and a > rectifier which typically provides service for a couple of days in a > typical installation.
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