Greetings!
I have a power supply situation that has me rather frightened...
All our data and VoIP go through a single, non-redundant stack of Cisco
Catalyst 3750 network switches (which also supply power to the phones via
POE). These switches have only a single power supply. They are all
plugged into a single UPS. Consequently, we have so many points of
failure I'm afraid to count them!
Apparently Tripp-Lite has some PDUs (Power Distribution Units) that
feature "dual-input" with "Auto Transfer Switching" ("ATS"). They're not
cheap, but it _appears_ that ATS will allow one to plug the PDU into two
separate UPS units. This way, if a UPS crapped-out royally and would not
allow even available line current to pass (we've had this happen on some
old UPS units), the company does not instantly blink out of existance.
Is this in fact what "ATS" with dual-input does?
Any experience, etc as to how well these things work?
Thanks!
(Oh yeah, any other positive suggestions for dealing with this situation?
I checked, and our particular Cisco switches do NOT allow a second power
supply to be added. Top level stuff, huh?)
--
Richard D. McClary
Systems Administrator, Information Technology Group
ASPCA®
1717 S. Philo Rd, Ste 36
Urbana, IL 61802
[email protected]
P: 217-337-9761
C: 217-417-1182
F: 217-337-9761
www.aspca.org
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