VoIP Softswitch Solutions

Media Exchange is proud to offer a self developed, trustworthy, high quality softswitch solution for the service providers that meets the highest level of expectations by being suitable to match a wide range of service requests. This system covers all the call control functions of the telecommunication networks including routing and billing as well.

About the VoIP generally

The recently existing types of networks are based on different technologies and serve different purposes. The users are able to achive several services offered by the numerous service providers. In our days not only the data transfer and the access to informations are important, but the voice and video stream transfers have the same level of importance. The VoIP (voice over IP) offers a good solution to reach this target by enabling the transfer of data, pictures, video and voice over the IP (Internet protocol), also providing the needful signalling information. To make it short the goal of the VoIP is the real time voice and video transfer through the Internet using the Internet Protocol. There are working systems that transact local, long distance and international calls using the Internet which means a much cheaper way than the traditional phone systems. There are two major protocols to bring VoIP into effect. These are the H.323 developed by ITU, and the SIP (Session Initiation Protocol) developed by the IETF.

The H.323 protocol

The ITU-T H.323 is a standard of the packed multimedia communication systems. It provides a secure base for the real time voice, video and data tarnsfer. The most often used technologies are the Ethernet and the Fast Ethernet. The most frequent tarnsfer protocols are the TCP and UDP, and IP used as a network protocol generally.

To promote the communication with the regular telecommunication systems the H.323 standard supports the SS7 signalling system. Resulting from this, the cooperation of the PSTN (Public Switched Telephone Network), the ISDN, the H.323 and the SIP environments can be achived. H.323 is designed to be independent from every hardware and operating system, so it can easily be used on any kind of platform.

Main features:

  • SIP/H323 signalling conversion,
  • Maintenance of connection between two diverse gateways or gateways placed in various subnets,
  • Centralized connection with billing system,
  • Querying routing servers for terminating gateways,
  • Gateways set control,
  • Working with devices behind NAT,
  • Protection from unathorized access,
  • Web-access to all configuration parameters.


  • H.323 support,
  • SIP support,
  • Traffic media proxy,
  • Ability to restrict the range of ports used in connections,
  • Work with gateways that don't support standard ports (1719 for RAS and 1720 for H.323 signalling, 5060 for SIP),
  • H.323 dialect support (fast start and ?245 tunneling),
  • Setting restrictions for fast start and H245 tunneling,
  • Switching gateways while calling (avoiding bad routes).

T.38 support:

  • UDP,
  • T.120 support,
  • Work with gateways with unmatched codec lists.


  • Gateways authentication by IP-addresses,
  • Gateways authentication by username and password.


  • Originator phone number conversion based on gateway dialled ip-address,
  • Dynamic gateway registration (using RAS),
  • Static gateway registration (using IP-address).

Billing support:

  • CDR creation,
  • RADIUS support,
  • Ability to use more than one billing server.


  • Web-interface,
  • Remote confifuration,
  • Status check,
  • Control monitor.