[Freeswitch-users] Spandsp mulated modems inbound/no /dev/FS* device?

[Michael Collins]

I looked at the source, just to confirm and I believe Anthony is correct.

Line 871 of mod_spandsp_modem.c:
switch_snprintf(name, sizeof(name), "modem/%d/%s", modem->slot, number);

That would suggest a syntax just like FreeTDM, where the dialstring is
"modem/x/y" where x is the "slot" and y is the dialed number. Also, I
suspect this block starting at line 856 means you can use a literal "a" for
the slot and it will hunt for the next available modem:

        if (!strcasecmp(modem_id_string, "a")) {
            modem_id = -1;
        } else {
            modem_id = atoi(modem_id_string);
        }

Please try this out and confirm. If possible, add the information to the
wiki. If you can't update the wiki then please report back and let us know
whether the dialstring format worked or not.

Thanks,
MC

On Mon, May 21, 2012 at 2:23 PM, Anthony Minessale <
anthony.minessale at gmail.com> wrote:

> IIRC its modem/1 or 2 3 4 etc.  Probably a for auto like tdm.  Check the
> code to be sure....
> On May 21, 2012 3:13 PM, "Alex Crow" <acrow at integrafin.co.uk> wrote:
>
>> On 21/05/12 20:28, Ken Rice wrote:
>> >
>> >
>> > On 5/21/12 2:15 PM, "Alex Crow"<acrow at integrafin.co.uk>  wrote:
>> >> Also I have the problem that unless FreeSWITCH is run as root, the
>> >> device nodes are not created.
>> >>
>> >> Unless in the last few weeks some docs have been updated on this, I'm
>> >> still stuck with T38modem.
>> >>
>> > If freeswitch running as root and not running as root doesn't work, this
>> > should tell you that you have a permissions issue... The FreeSWITCH
>> > developers fixing your systems perms issues is beyond the scope of the
>> > FreeSWITCH project...
>> >
>> > Otherwise, the FreeSWITCH modems basically work just like t38modem...
>> The
>> > only setting is how many of them to create then the only other settings
>> is
>> > configuring your platform to properly allow freeswitch (or the user that
>> > freeswitch is running as) create those devices then configure hylafax
>> to use
>> > them as normal.
>> >
>> > The steps to do this can vary from platform to platform (or even
>> versions of
>> > the platform. For example how you do this on centos5 is not how you do
>> this
>> > on centos6 due to changes in the platform.)
>> >
>> > K
>> >
>> >
>>
>> Ken,
>>
>> I respectfully disagree with the "like t38modem" bit of this. With
>> t38modem, you create a set of t38modem devices which actually register
>> against FreeSWITCH and therefore appear as registered endpoints, so it's
>> easy to route calls to them (ie transfer to "t38modem0 default XML").
>> When I did run FS as root, despite the device nodes being created, I saw
>> no endpoint registrations for the softmodems, nor did I find any
>> documentation saying that these endpoints may be addressed as, for
>> instance "spandsp/FSx".
>>
>> I am also used to writing udev rules, but I can't find anything that
>> allows a non-root uid/gid user to create device nodes for a device
>> provided by a userspace program.
>>
>> It'd be great to avoid T38modem, and I've asked these questions before,
>> namely:
>>
>> 1) Does anyone have any examples on any platform of tweaking udev to
>> allow FreeSWITCH to create device nodes at startup when running as, say,
>> user freeswitch or user www-data (without making the primary group of
>> said users "root" or setting setuid root on the executable). I am not
>> prepared to take the risk of running as either effective uid or gid 0.
>> Please share if so. I'm running on debian stable.
>>
>> 2) How does one direct an incoming call, say, from FreeTDM or a SIP/ISDN
>> gateway to one of the softmodems. I cannot find this in the docs.
>>
>> If we can divorce these questions from any association with another
>> user's questions on this list that's fine. I've tried to help that
>> person as much as I can out of my own good nature.
>>
>> Cheers
>>
>> Alex
>>
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>
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