>Date: Mon, 30 Sep 2002 19:56:55 -0500 >Subject: Re: speaking of splitting >From: John Teffer <[EMAIL PROTECTED]> >Message-ID: <[EMAIL PROTECTED]> >In-Reply-To: <[EMAIL PROTECTED]> > >> From: Bryce Lee <[EMAIL PROTECTED]> >> >> Was thinking if the telephone companies can utilize a splitter to yield >> two telephone lines >> fron one jack, why would not a similar pigtailed device for a pair of USB >> jacks? > >The problem is that USB does not work the same way as a telephone line. > >When you connect telephones together, all the phones do the same thing, when >you are talking on one you can hear it on all the phones in the house. >That's how you want a telephone to work. > >But that's not how you want a USB device to work, all devices on a USB chain >need to communicate separately with the computer. So a USB hub needs to do >more than split the wires, it also has circuitry in it that keeps the >signals on the USB bus going where they need to go. > >You can find very small 2 port bus powered USB hubs that are designed for >notebook computers and do not require an AC adapter. However, there is a >limit to how much stuff you can connect to an unpowered hub. > >What were you planning on using the extra USB jack for? > One "dual port" would power the keyboard and mouse, the other port would go to the printer. These would be powered from the split USB port. The other port would go to the LaCie CD burner.
Incidentally my McCally keyboard will not accept the printer USB cord in the jack opposite where the mouse is plugged in without causing grevious problems ie the computer will not shut off when turned off. Remove the printer plug and bingo the computer will now shut off when requested to do so. Hence I need to plug the printer into its own slot, and the keyboard into its own slot and in theory the CD burner into its own slot. That's for a total of three USB slots required... BTW Have tried a proper all ports powered (4-port hub) and run the disc burner and the printer into same. Neither work, nor are recognized by the computer. Seems the CD burner has to go into its own slot on the iMac, ditto for the printer. Bit of a qaundry eh? So maybe there is more "wrong with the my iMac than appears to the naked eye. As one macintosh guru suggested to me about a week or more past, "It appears your logic board may be flaky..." If that's the case, the replacement cost for same probably exceeds the replacement cost of the iMac. -- The iMac List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | - Epson Stylus Color 580 Printers - new at $69 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> iMac List info: <http://lowendmac.com/imac/list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/imac-list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
