Me neither, I did it just once and it was in the NetBeans . Maybe others can help or you can send src and include directories I and I can then compare agains the latest code and prepare patch in NetBeans. Thanks, Marek On Aug 18, 2010, at 5:31 PM, Igor Pavlov wrote: I'm not familiar with CVS, and haven't ever did patch... If you instruct me, than I can sent it to you tommorow. 18 августа 2010 г. 19:30 пользователь Marek Domaracky <domarack@cern.ch<mailto:domarack@cern.ch>> написал: OK I see. So far I implement the other way. I already sent the patch to Simon, but I don't know if he put it to CVS. If you are interested, I can send you the patch. Would it be possible to get the patch from you for the changes you did in h323plus lib? Thanks, Marek On 08/18/2010 04:38 PM, Igor Pavlov wrote: Now, I have no available MXP for tests :( but when I had it I found out the way to open extended video channel : 1. Send Generic request 2. Wait for Generic response 3. Send Generic Indication 4. Send OLC(extended video channel) with sessionID = 0 (!) 5. Send miscellatiousIndication LogicalChannelActive 18 августа 2010 г. 18:17 пользователь Marek Domaracky <domarack@cern.ch<mailto:domarack@cern.ch>> написал: Hi Igor, I'm testing as well with MXP and in my case MXP sending always 33 and higher. So far I had a problem only with the Mirial. What I have so far is just one way channel from the device to my application. Are you opening extended video form your application to the MXP? If I understand correctly if you send OLC with sessionID != 0 Tandberg will reject? Thanks, Marek On 08/18/2010 03:42 PM, Igor Pavlov wrote: I wnat to enlarge... When Tandberg (MXP) sends extended video channel, it sends sessionID=0, and only in OLCAck it accept actual sessionID. If send OLC for extended video with sessionID != 0 than Tandberg MXP sends OLCReject (InvalidSessionID). 2010/8/18 Marek Domaracky <domarack@cern.ch<mailto:domarack@cern.ch>> Hi, I'm working on H.239 implementation and find out that devices might ask SessionID=0 for a new video channel. In particular I did a test with Mirial. I was checking the thread http://lists.packetizer.com/pipermail/h323plus/2009-December/001269.html and it's mentioned that the SessionID=0 is invalid. I know it's not following the standard as for RTPSession the range is from 1..255, but for compatibility, don't you think we should allow it? I did a test call from Mirial to Tandberg and Tandberg didn't have a problem with it. The lines involved are rtp.cxx from PAssert(id > 0 && id < 256, PInvalidParameter); to PAssert(id >= 0 && id < 256, PInvalidParameter); and h323.cxx // We must have a valid sessionID if (sessionID < 1 || sessionID > 255) to if (sessionID < 0 || sessionID > 255) Thanks, Marek -- Игорь Павлов -- Игорь Павлов -- Игорь Павлов