ETSI TR 183 057-2008 Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Feasibility study on Out-of-band DTMF
European Telecommunications Standards Institute (ETSI)
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ETSI TR 183 057-2008
ETSI TR 183 057-2008 history
2008ETSI TR 183 057-2008 Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Feasibility study on Out-of-band DTMF