-36 is rediculus... no battery plant is going below 40 volts... alas
specifications cause much in wasted dollars... Just like the
military.
Don
I have all of the checklists and the widest range I found was -40 to
-57.5Vdc. One of the hardware designers here recalls a Bellcore spec that
included a range to -36Vdc.
I haven't found it yet. If I do, I'll post it.
Thanks for all of your responses, they all support the -40Vdc limit (so
far).
Jack
-----Original Message-----
From: Joe Finlayson [mailto:jfinlay...@telica.com]
Sent: Tuesday, November 19, 2002 4:28 PM
To: 'nebs@world.std.com'
Subject: RE: 48Vdc tolerance
Jack,
-40VDC to -56.7VDC rings a bell. I believe I got the -40VDC (1
minute soak) as a worst case from the SBC TP76200MP document and the 56.7 is
standard based on +5% of the -54VDC C.O. float voltage. I believe you'll
also find the 56.7 value in SBC's doc as well. I can't say I can recall any
other specs off the top of my head that go outside of these ranges, but
someone else may be able to cite another standard. I shoot for -40 to -60.
Thx,
Joe
-----Original Message-----
From: jmur...@quantumbridge.com [mailto:jmur...@quantumbridge.com]
Sent: Tuesday, November 19, 2002 2:41 PM
To: nebs@world.std.com
Subject: 48Vdc tolerance
Has anybody any information on the required operating range for equipment
with respect to -48Vdc power? I'm looking for Telcordia requirements
outside of the NEBS requirements that apply.
Thanks,
Jack
--
Don R. House,
Technical Representative
