Solution to abnormal video calls between Jain-Sip-applet-phone and grandstream v3005 IP Phones ")

1. The following is the test matrix 1 (the problem is not resolved ):

Callee Caller	Jain-Sip-UA	X-Lite	IP-video
Jain-Sip-UA	It can communicate normally, but the number of frames is not enough and it is not smooth.	When the call is received, the xlite is dropped.	After the IP address is answered, "keep" is displayed, and UA audio and video can be received.
X-Lite	Xlite crashes. At that time, both parties sent data.	Normal	Normal
IP-video	Unable to communicate normally, IP always displays "call"	Xlite can be connected to audio and video, and IP addresses cannot be connected to audio (video ?) Frequency	Normal

2. After careful inspection by team members, it was found that connection informatioin (C) in SDP had a problem. Originally, three parameters were required to be constructed in the program and only one parameter was used, the other two parameters are the default values, and the default values make the syntax analyzer of the IP Phone unidentifiable, resulting in the entire description information being discarded (see rfc2327 [2. protocol] the last few paragraphs ).

3. solution to the current problem:

The

Createconnection (messagelistener. getconfiguration (). contactipaddress)

1) Modify createsdpbody () in messengermanager ()

// Connection (c)

Connection connection =Sdpfactory. Createconnection ("in", "ip4", messagelistener. getconfiguration (). contactipaddress );

2) Modify getresponsesdpbody () in mediamanager ()

// Connection

Connection connection =Sdpfactory. Createconnection ("in", "ip4 ",Calllistener. Getconfiguration (). contactipaddress );

4. Test Results

Callee Caller	Jain-Sip-UA	X-Lite	IP-video
Jain-Sip-UA	It can communicate normally, but the number of frames is not enough and it is not smooth.	When the call is received, the xlite is dropped.	It can communicate normally, but the number of frames is not enough and it is not smooth.
X-Lite	Xlite disconnection	Normal	Normal
IP-video	Normal	Xlite can be connected to audio and video, and IP addresses cannot be connected to audio (video ?) Frequency	Normal