| lexicalization | eng: VoIP protocols |
| subclass of | e/Application Layer |
| has instance | e/cs/Hipath Feature Access |
| has instance | e/Call Admission Control |
| has instance | e/FoIP |
| has instance | e/Jingle (XMPP) |
| has instance | e/List of SIP request methods |
| has instance | e/List of SIP response codes |
| has instance | e/MiNET |
| has instance | e/Network Voice Protocol |
| has instance | e/Network-based Call Signaling |
| has instance | e/Open Phone Abstraction Library |
| has instance | e/RTP audio video profile |
| has instance | e/Registration, Admission and Status |
| has instance | e/UNIStim |
| has instance | e/fr/ID H.323 |
| has instance | e/fr/Registration Admission Status |
| has instance | e/fr/Universal Alcatel — New Office Environment |