spandsp does in fact support V.17 modulation at 14.4 kilobits per second,

so we should generate T38MaxBitRate of 14400 (even though that doesn't really
affect the FAX transmission much at all)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@235010 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_fax.c

@@ -370,7 +370,7 @@ static int transmit_audio(fax_session *s)
 	enum ast_t38_state t38_state;
 	struct ast_control_t38_parameters t38_parameters = { .version = 0,
 							     .max_ifp = 800,
-							     .rate = AST_T38_RATE_9600,
+							     .rate = AST_T38_RATE_14400,
 							     .rate_management = AST_T38_RATE_MANAGEMENT_TRANSFERRED_TCF,
 							     .fill_bit_removal = 1,
 							     .transcoding_mmr = 1,