New Spandsp FAX Backend

Matthew Nicholson from Digium has posted a note about a new fax API for Asterisk which supports SpanDSP:

Greetings,

A new FAX API for Asterisk has been developed. This new API allows the use of different FAX backends with the same frontend providing a uniform user interface and reducing code duplication. Currently there are two compatible backends: the commercial Fax For Asterisk backend and the open source Spandsp based backend. The Spandsp backend is ready for testing and can be found in the following SVN branch. It supports standard audio faxes and T.38 faxes. Please check it out and report any problems you find here.

http://svn.asterisk.org/svn/asterisk/team/group/res_fax

Thanks.
--
Matthew Nicholson
Digium, Inc. | Software Developer

Update:

I should have probably included some instructions on using the backend. To build the spandsp backend, you will need spandsp installed. It can be downloaded from http://soft-switch.org. Once spandsp is installed, Asterisk can be configured and built in the normal manner.

All faxing operations are done through the SendFAX and ReceiveFAX dialplan applications. They accept a TIFF file as either the file to send or as the destination of the received file. More information can be found in the documentation for those two applications.

Thanks.
--
Matthew Nicholson
Digium, Inc. | Software Developer

Further Update

Also note that in that branch, app_fax is still present, so if you have spandsp installed *both* app_fax and res_fax_spandsp will be built. Since app_fax and res_fax register the same application names (SendFAX and ReceiveFAX), you will either need to use menuselect to disable app_fax from being built, or edit /etc/asterisk/modules.conf to explicitly noload app_fax.

--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies

Current Rating: 7/10 (1 votes)

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