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  1. Rodger Hosking

    Avaya IPO 500 V2 SIP DTMF Tones Not Reliable

    thread940-1768951 We have an Avaya IPO V2 Rev 9.0 system connected to ten Optimum (Altice) SIP trunks since 2014. Right after installation, our installer went out of business, so I've been acting as the administrator since then. Problem: After connection to the destination, we experience...

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