Alternatives to Comcast

Brian Karas brk-gnhlug at karas.net
Wed May 21 22:29:40 EDT 2008


On 5/21/08 10:21 PM, "VirginSnow at vfemail.net" <VirginSnow at vfemail.net>
wrote:

> Actually, you can.  RJ-11 plugs fit nicely in RJ-45 jacks.  Alas, this
> is not likely to do what you want.  In fact, when that ring voltage
> comes in on the line... ZAP!

Ethernet and POTS service can co-exist peacefully (at least in theory) on
the same cable.  Plugging an RJ-11 phone type device into just about any
Ethernet port (switch or host) won't cause any issues.

It was a conscious part of the Cat3 (and up) cabling design specs that the
middle pair (pins 4/5 in an RJ45) not be used for network communications, so
that your "ZAP" scenario was not a cause for concern.

Ring voltage is only 90V, and most of these devices are designed to handle
600V+ spikes.




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