Siemens HIPATH V1.2.33 - Manual (Page 80)

Abbreviations and Technical Terms
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VoIP
Abbreviation of "Voice over IP."
This means Voice transmission with
Æ IP technology.
WAP
Abbreviation of "Wireless Application Protocol."
Synonym for graphic applications on mobile phones, organizers and other
suitable terminals, transferred using the protocol of the same name.
WSP
Abbreviation of "Wireless Session Protocol."
Protocol for transmitting data on
Æ WAP-compliant terminals.