[Asterisk-Users] Asterisk with a laptop with built-in Intel 537 modem

[woody+asterisk at solutionsfirst.com.au]

Below...

> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com 
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Ken Alker
> Sent: Friday, 30 January 2004 22:07
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Asterisk with a laptop with 
> built-in Intel 537 modem
> 
> I have * working on my Sony Vaio PCG-FX120 laptop.  I am 
> trying to get * to 
> recognize my internal PCI Intel modem as an FXO port.  I have 
> modified 
> wcfxo.c in order to identify the PCI modem properly.  Based 
> on output from 
> dmesg, wcfxo didn't recognize the modem until I inserted the 
> proper vendor 
> and device IDs into wcfxo.c and re-compiled.  Note that the 
> error message 
> from "modprobe wcfxo" still returns "No such devices", but 
> the card IS now 
> recognized based upon my dmesg results.  However, now I'm 
> running into the 
> error "Out of space to write register 06 with e0" as reported 
> by dmesg.
> 
> I tried changing ZT_CHUNKSIZE from 8 to 4 to no avail.  Per a FAQ at 
> www.digium.com, my problem is that my modem shares interrupts 
> with other 
> devices on my laptop.  This is indeed the case based upon 
> dmesg output.  It 
> appears the SMbus (controller?), audio controller, and modem 
> all share Int 
> 9.
> 
> Questions:
> 1) Is IRQ sharing really causing this problem?

I don't think so.  I think what you are doing is hacking the driver to think
that your built-in modem is an X100P you are successful in this.  The
problem is that your internal modem is not an X100P, and is not compatible,
and you haven't hacked your driver at all to to speak Intel 537, it still
speaks X100P, so driver-hardware communication doesn't work.

I think an alternative would be to get a separate box (mediatrix?) which has
FXO ports and can talk to asterisk using SIP.  I think this would be the
quickest solution which is almost as portable as your laptop.

Cheers,
Woody