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Mac Forum / Applications / Virtual PC / August 2005



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Use Mac Modem in VPC?

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Alan Quirt - 17 Aug 2005 12:14 GMT
The help files describe setting up VPC to use a modem by attaching a USB
to serial converter and an external modem.

That seems silly when my PowerBook has an excellent internal modem. Is
there any way to use it from VPC?
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Unseelie - 17 Aug 2005 18:43 GMT
Sure... just used shared networking. Your mac will use the modem as per
normal and VPC will have access to the internet.

Also, you need to read the help files more closely because it's very
clearly not specific to using an external modem via a USB to serial
adapter. If you need to use the modem directly in windows:

Open PC settings, assign com1 to modem.
Boot VPC, set up modem in windows manually (don't auto detect... there
are no windows drivers for the mac internal modem). Select one of the
standard modem scripts. If that does not work, use a slower one. Note
that dial up networking from Windows does not appear to work on dual
G5s.
Paul Power - 18 Aug 2005 22:18 GMT
There's a knowledgebase article for this issue:

http://support.microsoft.com/default.aspx?scid=kb;en-us;824363
Alan Quirt - 24 Aug 2005 14:40 GMT
> http://support.microsoft.com/default.aspx?scid=kb;en-us;824363

Thanks for the pointer. It does give more detail than the help file.

Unfortunately it does not seem to address my main issue (from a fairly
quick reading of it).

My laptop Mac has a built in modem. I want to assign VPC COM1 or COM2 to
that built in modem. It seems really dumb to me to have to buy and plug
in a USB to serial adapter and an external modem when I already have a
top quality modem built in.
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Unseelie - 24 Aug 2005 18:26 GMT
Do what I suggested before, use shared networking. if you do that, VPC
will share your Mac's connection, and there will be no need for setup
at all.

If that doesn't work, do what I suggested after that.

Open the PC settings for the VM that you want to attach the modem to.
Assign the modem to COM1, click OK.
Launch the Virtual Machine
Now go to phone and modem options in the VM.
Add a modem, assigned to COM1. Use one of the standard modem settings.
Do not let it autodetect the modem... that doesn't work as there are no
modem profiles for Apple's modem in Windows.
If you have connection issues, use a slower driver.

Oh, and for the record, the modem that Apple builds in is hardly top
rate... it's a software modem (as of the middle of 2004)... on the PC
side, these are called Win Modems and they're not that good. If you
have a new machine with a software modem, expect performance issues
within VPC while using it, as the modem can take between 25 - 50% of
the CPU while in use.

And, if you have a dual G5, you'll not be able to set the modem up in
Windows. PSS says this is a known issue. My guess: threading issues
surrounding CPU use...
Tony Kavadias - 29 Aug 2005 19:24 GMT
You have got to be joking, right?

Here's what you do:

1) For your virtual machine, type Command-T to bring up the
v-machine's prefs.

2) Select COM1 Port.

3) Click the "Mac serial port:" radio button.

4) Select "modem" in the pop-up list under the radio button.

5) Make sure the "modem" check box is also enabled to ensure
that DTR doesn't affect your serial port's operation.

5) Click "OK" to accept your changes.

It's that easy.

--
--  tonza

>> http://support.microsoft.com/default.aspx?scid=kb;en-us;824363
>
[quoted text clipped - 7 lines]
> in a USB to serial adapter and an external modem when I already have a
> top quality modem built in.
 
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