Have you tried this url?
Hardware software compatibility matrix. You will need CCO access
http://www.cisco.com/cgi-bin/front.x/Support/HWSWmatrix/hwswmatrix.cgi
Ben Hockenhull wrote:
> SO I have a 1750 in my lab so that I can play with a bit of VoIP using a
> couple of VICs, one FXO and one FXS.
>
> Trouble is that I seem to be having problems finding an IOS image that
> actually supports the FXO or FXS VIC. I know I need a Plus image, and I
> presume I need the voice feature set as well.
>
> I've tried various 12.1.xT IP/Voice/Plus/etc images, and none of them seem
> to support the VIC. I do a show voice port and it returns blank. The
> amber in use lights on the VIC ports are lit, even though there's nothing
> plugged in. I should also get dialtone on an FXS port regardless of
> config, and there's no dice there.
>
> Anyone know what might be going on? Suggestions for a known-working 1750
> image that actually supports the VICs?
>
> Ben
>
> --
> Ben Hockenhull
> [EMAIL PROTECTED]
>
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