RE: Action_item_pinout
And we used to have a nice pile of non-functional Meridian phones that had
been plugged into POTS lines. ;-) I think our objective to "do no harm"
will likely be mitigated with subjective judgment and consideration for the
most likely misconfigurations.
Bob Grow
-----Original Message-----
From: Scott Fritz [mailto:scott.fritz@xxxxxxxxxxx]
Sent: Wednesday, November 24, 1999 1:35 PM
To: stds-802-3-pwrviamdi@xxxxxxxx
Subject: Re: Action_item_pinout
At 12:15 PM 11/24/99 -0800, you wrote:
>The Nortel Meridian phones use the same 4/5 pairs, in the same way, but the
>voltage is around 30 volts.
>The Meridian 4/5 pair have DC voltage which is symetrical about ground as
>opposed to the plain old telephone which is ground and -48v .
>
However, on a POTS line the 48V is current limited. On some of the office
switches
(I don't know about the Nortel Meridian) they are not current limited.
This was a
major problem with smaller form factor modems.
Scott Fritz
TDK Semiconductor Corp.
138 New Mohawk Rd.
Nevada City, CA. 95959
Phone (530) 478-8271 Fax (530) 478-5251