Since the release of version 1.8 in 2010, Asterisk has supported connectivity to two external fax modem solutions.  The first is the res_fax_digium module that is provided as a part of Digium’s Fax for Asterisk solution.  The second is the res_fax_spandsp module that ties into the open source spandsp solution.  Digium has continued to support both modules through the lifetimes of Asterisk 1.8, 10, 11 and 12.

Beginning with Asterisk 13, Digium will no longer make available the res_fax_digium module.  Instead, users requiring fax capabilities for Asterisk 13 and forward should use the res_fax_spandsp module.  Asterisk’s dial plan functionality for use of … Continued

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