Making phone calls, Handset, speaker and headset mode, Multiple sip accounts and lines – Grandstream GXP21xx Series User Manual User Manual

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Making phone calls, Handset, speaker and headset mode, Multiple sip accounts and lines | Grandstream GXP21xx Series User Manual User Manual | Page 30 / 87 Making phone calls, Handset, speaker and headset mode, Multiple sip accounts and lines | Grandstream GXP21xx Series User Manual User Manual | Page 30 / 87
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