s122897
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PC Modems Used With A Mac
I'm trying to use a PC-version USR Sportster 28,800 Fax/Modem on a Mac 7200/75. I can't seem to get it to work above 9600 BPS. I've tried changing the default DIP switches by turning 1 off also, and I've tried several INIT strings, but to no avail. Is there a different INIT string or DIP switch combination I should be using, or do I need to use FreePPP (which I haven't been able to locate) instead of the ConfigPPP Control Panel I've been using? Or is using this PC modem with my Mac a lost cause?
ASKER
I tried switching cables with one provided by a friend who's proficient with Macs. Unfortunately, the cable change produced the same results as before. My friend assures me it's the right cable, and a good brand (ResNova). Even though it didn't seem to work in my case, kcowan's proposed answer was an excellent trouble-shooting guess, according to my friend.
ASKER CERTIFIED SOLUTION
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Hello,
Use AT&F1 for the init string. That's it!
Use the factory standard DIP switch settings (as printed on the bottom of the modem), except for DIP switch 1 in the DOWN (ON) position to force the DTR signal high.
Also make sure that your modem cable is a new one, good for "hardware handshaking" or was labeled as "high speed modem cable". Older Mac modem cables are different and will give you errors with 14.4 or 28.8 modems.
Has your friend confirmed that the cable is correct, by running it with a 28.8 or higher modem?
Set your PPP software to "hardware handshaking" (RTS/CTS) and your serial port speed to 57600 bps or higher.
Regards,
Richard
Use AT&F1 for the init string. That's it!
Use the factory standard DIP switch settings (as printed on the bottom of the modem), except for DIP switch 1 in the DOWN (ON) position to force the DTR signal high.
Also make sure that your modem cable is a new one, good for "hardware handshaking" or was labeled as "high speed modem cable". Older Mac modem cables are different and will give you errors with 14.4 or 28.8 modems.
Has your friend confirmed that the cable is correct, by running it with a 28.8 or higher modem?
Set your PPP software to "hardware handshaking" (RTS/CTS) and your serial port speed to 57600 bps or higher.
Regards,
Richard
s - if you find that Richard's comment solves the problem rather than anything I've said in my answer, then feel free to reject mine and invite him to submit it as an answer. I don't mind as long as you get things working to your satisfaction!
Rifty
Rifty
I have used Zoom, USR and Motorola modems designed for PCs on a PowerBook with no problems. The only difference I have seen between most PC and Mac modems is the Software included.