[Freeswitch-users] NDLB for SIP INFO

Hi guys, I've discovered that Gigatset and Yealink IP cordless send SIP INFO in a wrong way, according to SDP RFC.If I press 4, I get on SDP Signal=4\r\n Duration=100 While should be Signal=4\r\n Duration=100\r\n Freeswitch (1.4.23) answers with 400 Bad Request. I wonder if there's something like a NDLB params to accept this format, based on SDP Content Length. Thank you