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List:       soekris-tech
Subject:    [Soekris] Re: Power Supply
From:       chad () DCFinc ! com (Chad R !  Larson)
Date:       2004-03-23 23:57:24
Message-ID: 20040319162001.A28488 () freeway ! dcfinc ! com
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On Thu, Mar 18, 2004 at 06:11:44PM -0500, Louis A. Mamakos wrote:
>> On Wed, Mar 17, 2004 at 09:56:38PM -0800, Stefan Hudson wrote:
>>> For what it's worth, standard POTS circuits are 48VDC on hook and 90VAC 
>>> ring voltage, so any cable designed to carry POTS (basically any cable 
>>> used for Ethernet) should be able to handle ~50VDC with no trouble.
>> 
>> For what it's worth, standard POTS circuits are whatever DC volts it
>> takes to shove 60mA through a "standard" phone.
>> 
> 
> I think there is an upper bound on the voltage, probably about -52VDC
> or whatever the float voltage is on the large stack of batteries used
> to power the equipment.  

I've seen upwards of 70VDC in the field.  And banks of pots in the
telco offices to trim the loop current.

> 
> louie
> 

	-crl
--
Chad R. Larson (CRL15)   602-953-1392   Brother, can you paradigm?
chad@dcfinc.com         chad@larsons.org          larson1@home.com
DCF, Inc. - 14623 North 49th Place, Scottsdale, Arizona 85254-2207

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