Sippy Softswitch Support

Sippy Softswitch Support

Sippy Softswitch Support

The RTP proxy is a high-performance software, sippy softswitch support proxy for RTP streams that can work together with SIP Express Router or OpenSER. Originally created for handling NAT scenarios, it can also act as a generic media relay as well as gateway RTP sessions between IPv4 and IPv6 networks. RTPproxy was developed by Maxim Sobolev and is now being actively maintained by the Sippy Software, Inc. 

 

The RTP proxy supports some advanced features, such as remote control mode, allowing building scalable distributed SIP VoIP networks. The nat helper module included in the SIP Express Router or OpenSER SIP Proxy software allows using multiple RTPproxy instances running on remote machines for fault-tolerance and load-balancing purposes. 

 

The software also supports video relaying and RTP session recording. 

 

How it works ,sippy softswitch support

This RTPproxy works as follows: 

 

When SIP Proxy receives the INVITE request, it extracts call-id from it and communicates it to the proxy via the Unix domain socket. RTPProxy looks for an existing session with such id, if the session exists, it returns UDP port for that session, if not, then it creates a new session, binds to a first empty UDP port from the range specified at the compile-time and returns a number of that port to a SIP Proxy. After receiving a reply from the proxy, SIP Proxy replaces media IP: port in the SDP to point to the proxy and forwards the request as usual; 

when SIP Proxy receives a non-negative SIP reply with SDP, it again extracts call-id from it and communicates it to the proxy. In this case, the proxy does not allocate a new session if it doesn’t exist, but simply performs a lookup among existing sessions and returns either a port number if the session is found, or an error code indicating that there is no session with such id. After receiving a positive reply from the RTPproxy, SIP Proxy replaces media IP: port in the SIP Proxy reply to point to the proxy and forwards reply as usual; 

UDP

After the session has been created, the proxy listens on the port it has allocated for that session and waits to receive at least one UDP packet from each of the two parties participating in the call, sippy softswitch support. Once these packets are received, the proxy fills one of two IP: port structures associated with each call with the source IP: port of that packet. When both structures are filled in, the proxy starts relaying UDP packets between parties; 

the proxy tracks idle time for each of existing sessions (i.e., the time within which there were no packets relayed), and automatically cleans up sessions whose idle times exceed the value specified at compile time (60 seconds by default). 

Performance 

It should be able to handle up to 2,000 simultaneous G.729 sessions on a decent machine (P4 2.5-3.0 GHz). Please note that fine-tuning of OS network stack parameters can be necessary to get such high numbers sippy softswitch support. Since RTP traffic consists of a big number of very short UDP frames (up to 30 frames/sec for one session), so that network stack should be prepared to handle a huge number of short packets. 

 

Getting RTPproxy 

Source code via read-only Git 

 

To get the latest source code from the CVS, use the following command: 

 

git clone git://sippy.git.sourceforge.net/gitroot/sippy/rtpproxy 

 

then do the usual: ./configure; make; make install , sippy softswitch support

 

Compatibility 

Your client must support symmetric RTP for RTP proxy to work. It must send and receive media on the same port – that’s the only way to make media to cross the NAT. Most of the clients available today do support symmetric RTP, though. 

 

Support 

Community-based support can obtain via SIP Express Router mailing lists mailto:[email protected] 

 

Commercial support is available from the Sippy Software, Inc. 

 

Links 

SIP Express Router: The SER SIP proxy , sippy softswitch support

SER example NAThelper: Example of usage 

SER module nat helper: The NAThelper module , sippy softswitch support

NAT and VOIP: Some facts on NAT and VOIP 

OpenSER And RTPProxy – OpenSER v1.1.x configuration to do NAT traversal using nat helper and RTP proxy 

OpenSER v1.2.x and RTPProxy – OpenSER v1.2.x configuration to do NAT traversal using nat helper and RTP proxy 

MediaProxy Comparison – MediaProxy Comparison , sippy softswitch support

 

Fiber-optic World Wide Web Providers at Weatherford, TX 

Users possess roughly an identical encounter with Internet-based online service. Since they perform using wire assistance. Since it has really a similar installation sippy softswitch support. The most important distinction is that the rate — fiber-optic world wide web is really on a network that is social, and this also contributes to substantially quicker rates. Fiber optic World-wide-web in Weatherford, TX, can be thought of as FiOS online assistance, and clients may also obtain cell mobile and television services.

 

DSL World Wide Web in Weatherford, TX 

As the specialized word is an electronic subscriber line, many understand such an online service since DSL. Using DSL online assistance in Weatherford, TX, an individual receives the world wide web throughout his mobile. This analog mobile provides access for bandwidth, bandwidth, and also further bandwidth out of the internet line stipulates an online relationship sippy softswitch support. Such an internet undergoes a DSL modem, and also the modem creates the relation between your monitor and the online supplier.

 

Clients won’t need to be concerned about some problems when conversing on your device. And surfing the net concurrently, as calls utilize hardly any bandwidth. DSL presents a single significant benefit over cable. And that’s that rate will not diminish whenever you find a number of applications. In 1 region sippy softswitch support. Even a DSL supplier can offer precisely the exact same top rates to numerous clients inside the same area. In lots of instances, a cable supplier will advertise increased maximum rates compared to the usual DSL supplier advertises. However, clients wind up getting higher rates throughout the DSL supplier.

DSL

The disadvantage DSL is the fact that space things. The further an individual is out of your DSL supplier’s office. So the even worse than his connection grade is going to be undoubt. Therefore he will be coping with lesser service. Clients thinking about DSL agency at sippy softswitch support. TX really should assess directions on My Country Mobile. And see user testimonials out of their spot to learn which sort of rates they are able to count on. An analog telephone is really a necessity for DSL assistance. Therefore any purchaser who desires DSL online service should currently have an analog telephone or purchase just one put in.

 

Satellite World Wide Web at Weatherford, TX 

Satellite online sites at Weatherford, TX will involve linking to the web by means of satellite since its name implies that The consumer includes a modem they relate to the bean dish sippy softswitch support. The satellite-dish eliminates frequencies out of a satellite and also transmits those frequencies into the modem, and which offers access.

 

This is simply not probably the most frequently encountered kind of high-speed world-wide-web in Weatherford, TX, as clients from populated locations have a tendency to really go, such as cable, DSL, or fiberoptic, nonetheless it also is useful for clients who reside in rural regions sippy softswitch support. These areas frequently do not possess additional online alternatives obtainable through telephone or cable businesses.

Even if DSL support is currently accessible, the purchaser’s space in the supplier office may create serious link problems sippy softswitch support. Satellite internet solves this issue and lets users that do not dwell from the metropolis to get highspeed online services. Satellite websites demand the consumer to have or put in a satellite dish which confronts the equator.