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| Best Internet Telephony
aql BT C4L Entanet International Ltd iNet Telecoms Ltd (Voipfone) Telappliant Ltd |
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| Overview of technical testing:
Epitiro will periodically perform a VoIP call over a broadband service, using the supplied SIP account, to a PSTN terminated callee. The same broadband service and PSTN terminated callee will be employed to test all VoIP services. An audio reference will be injected into the call and the performance of the audio delivery and network behaviour during the call will be measured. Specific measurements taken are as follows: Audio MOS (using ITU P.862.1 PESQ) Call setup time Volume differential Background noise Network jitter Network packet loss |
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