On December 8, 2004 04:41 pm, Michael Welter wrote: > Also, the box is on a UPS, so I'm assuming the AC power is generated > from the battery and is a perfect sine wave. But that begs the > question: does a UPS system connect the mains to the output, or is the > input power used to charge the battery, and the battery used to generate > the output power?
Depends on the UPS; most types you buy at a consumer-grade store are offline UPSes -- they will transfer the load to the battery with the mains is below a certain threshhold, and bypass the batteries (connect load to mains) when mains is restored. There are "on-line" UPSes that always generate AC but they are not the norm, and you pay a premium for them. No UPS you'll want to pay for generates a perfect sine wave -- it'll be a stepped-voltage waveform but the current waveform will not be too bad. -A. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
