2007/10/15, Arjen de Korte <[EMAIL PROTECTED]>: > Arnaud Quette wrote: > > >> So the questions are: > >> 1: is the USB cable simply like the RS232 cable but with built-in USB > >> converter ? > >> 2: or is the com-port some sort of "autodetecting" system that can > >> work in both a USB and a RS232 config ? In that case, would anyone > >> know the USB pin layout of the socket on this thing ? > >> 3: has anyone else used this or a similar MGE system on the mac? > >> 4: Does anyone know a cheap address for one of these USB cables in > >> the Netherlands, or at least Europe? > > > > the newer models you're talking about are the USBS models, which allow > > to switch between USB or serial by just changing the cable. If you own > > such a model, you should have an RJ12 connector on the UPS side, and 2 > > cables, one ending with a DB9 (for serial use) and another with a > > standard USB connector. > > The OP doesn't have the USB cable, that's why he came here in the first > place.
yup, Dominique Lallement just made the same remark. It seems that I've read that thread too quickly > > Otherwise, the keyspan solution mentioned by my fellows are just fine > > and have been validated. > > Using the serial port has a slight disadvantage over the USB port. The > SHUT protocol takes (especially during startup) a fair amount of time > because a lot of data has to be sent over a slow link. On my Evolution > 650, it takes almost 10 seconds just to transfer the report descriptor. > After that, the differences are small however, so operationally this > should not be a problem. yup. The problem is that depending on the exact model (USBS or not), switching to USB implies also a different card... > > I hope this answers your question, > > I think the OP would still like to know if it is possible to either buy > or make such a cable (questions 2 and 4). I will so make a full answer to the various questions: > 1: is the USB cable simply like the RS232 cable but with built-in USB > converter ? > 2: or is the com-port some sort of "autodetecting" system that can > work in both a USB and a RS232 config ? In that case, would anyone > know the USB pin layout of the socket on this thing ? on USBS models, we are simply using different wires on the RJ12 (UPS side) to cable the right communication (USB or serial). Older models had 2 distinct cards. > 3: has anyone else used this or a similar MGE system on the mac? I know of several people that use USB or serial MGE units with keyspan on Mac. > 4: Does anyone know a cheap address for one of these USB cables in > the Netherlands, or at least Europe? Dominique will check to send with you the appropriate solution. Arnaud -- Free Software Developer - http://arnaud.quette.free.fr/ Debian Developer - http://people.debian.org/~aquette/ Network UPS Tools (NUT) Project Leader - http://www.networkupstools.org/ Ubuntu Media Center (UMC) Project Leader - https://launchpad.net/~umc-team _______________________________________________ Nut-upsuser mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser
