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| πρωτόκολλο προετοιμασίας περιόδου λειτουργίας (A standard signaling protocol for establishing multi-media communications sessions between two or more users over an IP network) | |||
| English thesaurus | |||
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| SIP | |||
| SIP (IETF, VOIP, ENUM) | |||
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| SIP (Session Initiation Protocol) | |||
