Phone to Phone
It is a type of communication between two ordinary phones, which are connected and voice transmits over telecommunication network.
Obviously SIP is considerably better than H.323 and complies with the understanding of IP-telephony as a global mass IP-service, and it should be implicitly considered right this way. And as SIP is able to serve not only telephony but also any communications at all in the real time over the IP-protocol; obviously it should become a base for other IP-services not yet existing but will appear in the future, as well.
Emutex
The VMX is an IP PBX that supports up to 128 phone extensions and provides integrated features including secure call recording, call centre call queuing, automated attendants, automatic call distribution and remote/home worker connectivity.
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