1 VoIP Conversation but 2 RTP Streams?

Posted by pepito on Super User See other posts from Super User or by pepito
Published on 2012-05-22T15:36:36Z Indexed on 2012/06/17 3:20 UTC
Read the original article Hit count: 295

Filed under:

voip

|

wireshark

I'm testing a VoIP system based on OpenSIPS. It has no RTPproxy, so calls do not pass through OpenSIPS.

I tried to make a call between two smartphones, and it succeeded. I also turned on Wireshark, and got this result.

Is that mean that voice call from 1st phone to 2nd phone went through 1st RTP stream and voice call from 2nd phone to 1st phone went through 2nd RTP stream?

Why couldn't it only used one RTP stream? It could just go back and forth :)

© Super User or respective owner

Related posts about voip

pfsense multi-site VPN VOIP deployment

as seen on Server Fault - Search for 'Server Fault'
have main office pfsense firewall configured like this: local networks WAN - internet LAN - local network VOIP - IP phones need to connect remote offices (multi-users) and single remote users (from home) use IPSEC or OpenVPN to build "permanent" automatically connecting tunnels from remote location… >>> More
pfsense multi-site VPN VOIP deployment

as seen on Server Fault - Search for 'Server Fault'
have main office pfsense firewall configured like this: local networks WAN - internet LAN - local network VOIP - IP phones need to connect remote offices (multi-users) and single remote users (from home) use IPSEC or OpenVPN to build "permanent" automatically connecting tunnels from remote location… >>> More
How to implement VOIP + SIP in iPhone?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello all, I want to develop a VOIP application for iPhone . But I don't know the basics of VOIP concepts and also If there are any sources or library available that can I use in my application . So If anyone can provide me VOIP learning resources or library or anything that is useful in terms… >>> More
Simplest VoIP Solution Yet?

as seen on Internet.com - Search for 'Internet.com'
MyPhone2Go is fully contained on a portable USB flash drive, can be used with just about any Windows computer. >>> More
Study: Mobile VoIP Explosion on the Way

as seen on Internet.com - Search for 'Internet.com'
Recent research from InStat predicts there will be nearly 300 million active mobile VoIP users by end of 2013. >>> More

Related posts about wireshark

wireshark http POST

as seen on Server Fault - Search for 'Server Fault'
Hi I would like to have a http POST request method CAPTURE filter I know it is easy to do it by display filter http.request.method==POST but I need tcpdump compatible I wrote tcp dst port 80 and (tcp[13] = 0x18) But it is not perfect... tcp dst port 80 and (tcp[((tcp[12:1] & 0xf0) 2):4] =… >>> More
How to filter http traffic in Wireshark?

as seen on Server Fault - Search for 'Server Fault'
I suspect my server has a huge load of http requests from its clients. I want to measure the volume of http traffic. How can I do it with Wireshark? Or probably there is an alternative solution using another tool? This is how a single http request/response traffic looks in Wireshark. The ping is… >>> More
Wireshark is not capturing traffic through http://localhost:8888

as seen on Super User - Search for 'Super User'
Currently, my wireshark can capture traffic from http://localhost (traffic that is on port 80) but it won't capture traffic on localhost:8888 Is there any extra configuration/software that I need for wireshark to capture traffic of localhost on this port? I'm running Ubuntu 9.10 >>> More
Multi language support in wireshark

as seen on Super User - Search for 'Super User'
Do we have multiple language support with Wireshark. We are using Windows Xp SP2 and Ubuntu Linux environment. Actually we have a plugin which is UDP based and we have a requirement to Analyse the Information in Packet List Pane and Packet Details Pane to be viewed in other languages like French… >>> More
Saving Wireshark capture settings for future use

as seen on Server Fault - Search for 'Server Fault'
Is there any way to save Wireshark capture options? So it can be reuse after restart Wireshark. Also, if the saved file is in plain text, it's possible to use scripts generating bunch of capture settings, such with different filter setting. Does anyone know? Thanks. >>> More