Out-of-band dtmf, Dtmf method, Rtp encryption – AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN User Manual

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Out-of-band dtmf, Dtmf method, Rtp encryption | AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN User Manual | Page 257 / 1049 Out-of-band dtmf, Dtmf method, Rtp encryption | AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN User Manual | Page 257 / 1049
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