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- Path: sobt.ao.net!user
- From: eric@ao.net (Eric Shaw)
- Newsgroups: comp.dcom.modems,comp.sys.mac.hardware.misc,comp.sys.mac.comm
- Subject: Re: mac modems with no wall adaptor needed
- Date: Sat, 24 Feb 1996 11:55:56 -0500
- Organization: Access Orlando
- Message-ID: <eric-2402961155560001@sobt.ao.net>
- References: <4g19ml$ke0@tuba.cit.cornell.edu>
- NNTP-Posting-Host: sobt.ao.net
-
- In article <4g19ml$ke0@tuba.cit.cornell.edu>, srs3@crux1.cit.cornell.edu
- (Motti) wrote:
-
- >I got a SupraExpress 144plus for my macintosh (8100) and
- >to my surprise I found that it had no wall adaptor. Rather, it
- >takes it power off of the ADB port.
- >
- >This is *very* connvenient, but does anyone know if there is
- >any disadvantage to this arrangment?
-
- Yes, there is a *major* disadvantage to this arrangement. Your ADB port
- has a very limited amount of power. When the modem uses too much, your
- keyboard and other ADB devices will occasionally reset due to not getting
- enough power from the port. Often, this is seen by the computer as your
- pressing the power key on the keyboard. If the dialog often comes up all
- of a sudden "Are you sure you want to shut down your computer now?", that
- is the cause. Also, when you actually do shut the computer down, the port
- goes into a lower power state, and you may always see the keyboard reset
- due to the modem using a LARGE amount of the ADB power, immediately
- turning the computer back on, as the 8100 has softpower.
-
- Global Village uses this arrangement on their 2400 (Bronze) model, and
- I've yet to see one without this problem, although I have seen a
- SupraExpress 288 without that problem, so maybe Supra figured out they
- need to lower the power consumption to make it work that way, but I would
- not be surprised if that was just one lucky user who had one without
- getting that problem.
-