I agree with Jack. At most, why note make a power shot with three settings: 12v, 15v, and 18v? That would seem simpler and cheaper than trying to build potentially troublesome intelligence into it.
Sam Not an EE :) On Thu, 12 Jun 2003, Jack Berridge wrote: > Sounds interesting....and scary. I'm not an EE but when you start talking > about an "intelligent powershot" that is capable of making decision based > on "sensing the cabling length" it scares me. This scares me because > "intelligent devices" tend to die (fail) more often than a good old dumb > device that's only purpose is to provide a specific (designed/engineered) > amount of power. To me, I see an intelligent device as another point of > failure just waiting to happen. Whereas, if we had a straight 18v power > supply (powershot) it's either working.....or not. No intelligence, no > extra features or sensors to worry about failing --- just good old power > source that is capable of supplying 18v as designed/engineered. Why do you > feel the need to have an intelligent powershot versus one single straight > 18v that works for short and/or long Ethernet cable runs? > > Thanks. > > > > Jack > > > > At 12:10 AM 6/12/2003 +0800, you wrote: > >This is going to change. As I mentioned earlier, we are working to have > >higher power voltage adaptor and with intelligent powershot that can > >dynamically adjust the power supply based on cable length sensed. So it > >will be one universal AC power adaptor. > > > >Alex > >sB Tech Support > > > > > >-----Original Message----- > >From: [EMAIL PROTECTED] > >[mailto:[EMAIL PROTECTED] On Behalf Of Jack Berridge > >Sent: Wednesday, June 11, 2003 9:37 PM > >To: '[EMAIL PROTECTED]' > >Subject: RE: [smartBridges] POE, voltage range > > > >Curious. If you highly recommend using smartBridges power supply for > >smartBridges devices, why doesn't smartBridges have a power supply and PoE > >solution that works to the maximum Ethernet cable specs (~300 feet)? Why > >even have the 12v power supply? Why not have an 18v power supply that > >will work with the 50' or less cable runs as well as the longer cable > >runs? At least for the outdoor (WISP type) solutions. Other vendors we > >work with use the higher end (18v, even 24v) power supplies and it works > >for the short as well as the long runs. It just seems that the 12v has > >caused your user community more problems which are resolved by going to > >15v or 18v solutions......why not have an 18v be the normal (default) > >solution for outdoor smartBridges solutions? > >Thanks. > > > > > > > >Jack > > > > > > > > > > > > PM 6/11/2003 +0800, you wrote: > > > >>If you are using any third party power supply, please use the regulated > >>DC voltage power supply. We are highly recommended to use our > >>smartBridges Power supply for our devices. If the Ethernet > >>cable length exceeds more than 50 meters, then only 18V is recommended. > >> > >>Seeni, SB support > >> > >> > >>-----Original Message----- > >>From: [EMAIL PROTECTED] > >>[mailto:[EMAIL PROTECTED] On Behalf Of phantam > >>Sent: Wednesday, June 11, 2003 9:57 AM > >>To: '[EMAIL PROTECTED]' > >>Subject: RE: [smartBridges] POE, voltage range > >> > >>Dynamic power sounds intriguing. > >> > >>---------- > >>From: Mark Koskenmaki [mailto:[EMAIL PROTECTED] > >>Sent: Tuesday, June 10, 2003 7:32 PM > >>To: [EMAIL PROTECTED] > >> > >>Thank you. I have no fears of even reaching 15V, but wanted to make > >>sure that even if somehow things got to 15.5 or 16, it would be ok. > >> > >>Thanks again. > >> > >>Mark > >> > >> > >>NEOFAST.NET > >>North > >>East > >>Oregon > >>FAST > >>Net > >>mark(at)neofast.net > >>----- Original Message ----- > >>From: <mailto:[EMAIL PROTECTED]>Alex Wong > >>To: <mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED] > >>Sent: Tuesday, June 10, 2003 11:29 AM > >>Subject: RE: [smartBridges] POE, voltage range > >>We recommend 18V as max athough can be higher. Pls refer to this link for > >>more details. > >><http://www.smartbridges.com/new/products/ps.php>http://www.smartbridges.com/new/products/ps.php > >> > >> > >>We are also in the development stage of having a dyanmic power supply > >>that can automatically adjsut the power supply based on the cable sense. > >>Alex > >>sB Tech Support > >>-----Original Message----- > >>From: [EMAIL PROTECTED] > >>[mailto:[EMAIL PROTECTED] On Behalf Of Mark Koskenmaki > >>Sent: Wednesday, June 11, 2003 12:03 AM > >>To: '[EMAIL PROTECTED]' > >>Subject: [smartBridges] POE, voltage range > >>What's the upper limit for voltage, for POE on the ABO and APPO? > >>Thanks > >>NEOFAST.NET > >>North > >>East > >>Oregon > >>FAST > >>Net > >>mark(at)neofast.net > >>--- > >>Outgoing mail is certified Virus Free. > >>Checked by AVG anti-virus system > >>(<http://www.grisoft.com>http://www.grisoft.com). > >>Version: 6.0.488 / Virus Database: 287 - Release Date: 6/5/03 > The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://198.63.203.6
