If systems are not interoperable users with different equipment can not connect. The reality is a lot of video conferencing equipment currently installed that will not talk to a lot of other currently installed video conference equipment.
Interoperability can be supported in two ways:
In the Gateway model each user connects to a gateway that supports at least two different types of connection. Within the gateway the video conference data streams are decrypted, converted, re-encrypted and sent on. This presents a significant data security issue, as the data conversion process requires decryption - so the gateway is a weak link.
The GP2U Poly-client model is remarkably simple. When a user presses the connect button in our interface, the system looks to see what sort of connection is needed. For an H.323 endpoint the connection data is passed to an H.323 Softphone (Mirial), and the call initiated. For Lifesize SIP endpoints, which only talk to Lifesize software, the connection data is passed to Lifesize Desktop, and the call initiated. For Skype endpoints the connection data is passed to Skype, and the call initiated.
The advantages of the GP2U Poly-client Model are:
The only real disadvantage of the GP2U Poly-client Model is the requirement for a Specialist user to purchase Mirial Softphone to support H.323/SIP and Lifesize Desktop to support Lifesize. The cost for each client is < $200.