Error loading module 'res_fax_digium.so' - undefined symbol

Asterisk Asterisk Support
1

Hi everyone,

I have problems to load the res_fax_digium module. I’m using Asterisk 13 (res_fax is already included in this version) on my 64 bit CentOS machine and I want to send and receive faxes using T.38 specification.
So I “purchased” the res_fax_digium (which is actually for free for one channel) module and registered it.
After installation I copied the res_fax_digium.so to the Asterisk modules folder (/usr/lib/asterisk/modules).

But the module isn’t listed in CLI when I type [quote]module show like[/quote] or [quote]config show help[/quote] (so I guess its not loaded)
When I try to load the module file manually via [quote]module load res_fax_digium.so[/quote] CLI prints error

[quote][Nov 17 13:09:25] WARNING[7243]: loader.c:564 load_dynamic_module: Error loading module ‘res_fax_digium.so’: /usr/lib/asterisk/modules/res_fax_digium.so: undefined symbol: ast_format_set
[Nov 17 13:09:25] WARNING[7243]: loader.c:1038 load_resource: Module ‘res_fax_digium.so’ could not be loaded.
[/quote]

Don’t know what I’m missing.
Any suggestions?

2

Howdy,

There isn’t currently a res_fax_digium.so module for Asterisk 13. For faxing in Asterisk 13, currently, you’ll want to use res_fax_spandsp.so instead.

Cheers

3

Thank you for your response.

Can I send and receive faxes with res_fax_spandsp.so when I want to use T.38 protocol?

4

Yes.

5

Okay,
I will have a try and give feedback about the result

edit: thread can be closed. Think res_fax_spandsp is the right thing for me, but with my first configuration tries I ran in some other issues.
Will open a new topic.

6

Cool :smile: