If you really are using openh323, it has not been active for many years now. You should use either H323Plus or OPAL voip depending on your needs. ---------- Robert Jongbloed Vox Lucida Pty. Ltd. -----Original message----- From: 陈炳锡-阳阳谷信息科技 Sent: Thursday, 26th May 2016, 19:40 To: h323implementers Subject: [h323implementers] hi hi is it a bug of OpenH323? i have a problem in using openh323,  in the OpenH323 transmission channel, i am send more than 65K of the size of the data, it will not be sent out.