OK. Thank you. On Tuesday, June 1, 2021, 03:02:19 a.m. EDT, Henning Westerholt <hw(a)skalatan.de> wrote: #yiv7470426267 #yiv7470426267 -- _filtered {} _filtered {} _filtered {}#yiv7470426267 #yiv7470426267 p.yiv7470426267MsoNormal, #yiv7470426267 li.yiv7470426267MsoNormal, #yiv7470426267 div.yiv7470426267MsoNormal {margin:0cm;font-size:11.0pt;font-family:sans-serif;}#yiv7470426267 span.yiv7470426267E-MailFormatvorlage18 {font-family:sans-serif;color:windowtext;}#yiv7470426267 .yiv7470426267MsoChpDefault {font-size:10.0pt;} _filtered {}#yiv7470426267 div.yiv7470426267WordSection1 {}#yiv7470426267 Hello Victor,   if you have the source (freeswitch) under control, I would just change it there for consistency.   Cheers,   Henning   -- Henning Westerholt –https://skalatan.de/blog/ Kamailio services –https://gilawa.com   From: sr-users <sr-users-bounces(a)lists.kamailio.org>On Behalf Of Victor Velo Sent: Wednesday, May 26, 2021 11:31 PM To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Subject: [SR-Users] SDP body, add maxptime attribut   Hello,   I would like to add the maxptime attribut to the sdp body. How and where should I do insertion?   This kamailio is also using RTPEngine, so is it better to do the insertion using RTPEngine? And the source of the SDP is actually FreeSwitch :), maybe there to tweak?   Of course, I don't know either way of doing it so please advise.   Thanks,   Victor