Re: Sierra Wireless Aircard 750 GSM/GPRS

On Mon, Oct 14, 2002 at 04:49:41PM +0100, Julian Chesterfield wrote:

> 
> sio4 at port 0x240-0x27f irq 9 flags 0x40000 slot 0 on pccard0
> sio4: type 8250

8250?.. Hmm.. Even my old USR Megahertz shows up as 16550A sio..

> sio4: unable to activate interrupt in fast mode - using normal mode
> 
That's ok - it's common message.

> which seems to indicate that the hardware is working. The specs from Sierra 
> tell me that the communication settings for the host machine should be 
> 115kbps, 8-bit, no parity and one stop bit. This is where I have trouble 
> understanding what happens. At this stage, I just want to be able to 
> communicate with the modem and issue AT commands to check whether it's working 
> etc.. but I can't get any feedback at all. I've read through the handbook on 
> setting up serial lines/modems but don't fully understand what applies to my 
> situation. My understanding is that the ttyd* device must be enabled to point 
> to the sio interface in order for the system to communicate with the wireless 
> interface.

Wrong. Read handbook carefully - ttyd* are for _incoming_ connections.
For outgoing there are cuaa*.


> How should I setup the tty interface? I've tried modifying the /etc/ttys line 
> as indicated in the handbook as:
> 
> ttyd0 "/usr/libexec/getty std.115200" dialup on secure

sio4=ttyd4, but it doesn't matter for your situation. Just remove that line.

> 
> this starts a getty process but doesn't seem to help when I run cu or tip, I 
> get a "Line in use" error command.
> 
> When I run cu or tip without the getty process active, the application runs 
> but I get no response to my typing.

Use /dev/cuaa4 as device to connect to.

> 
> Can someone point me in the right direction on what is supposed to happen, and 
> how the configuration should be done? Any help much appreciated,
> 

And, again, if your card is looking as 8250 to system, there might be
troubles using port speed greater than 9600.

-- 
BR,
Kirill Bezzubets                                CASE-RIPE CASE-RIPN
Senior Administrator, Technical Department      mailto:[email protected]
Solaris ISP & Telecommunications Co. Ltd        http://www.solaris.ru

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