To make and receive calls using a headset, Making calls – Aastra Telecom 55i IP Phone User Manual

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To make and receive calls using a headset, Making calls | Aastra Telecom 55i IP Phone User Manual | Page 87 / 152 To make and receive calls using a headset, Making calls | Aastra Telecom 55i IP Phone User Manual | Page 87 / 152
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