Andersen S , Duric A Telio , Astrom H , et al. Global IP Sound, Internet Low Bit Rate Codec(iLBC), Internet RFC3951, 2004
5
Rosenberg J , Mahy R , Matthews P , et al. Session Traversal Utilities for NAT(STUN). Internet RFC5389, 2008
6
Mahy P , Matthews P , Rosenberg J . Traversal Using Relays around NAT (TURN): Relay Extensions to Session Traversal Utilities for NAT(STUN). Internet RFC5766, 2011
7
Rosenberg J . Interactive Connectivity Establishment (ICE): a Protocol for Network Address Translator (NAT)Traversal for Offer/Answer Protocols. Internet RFC5245, 2010