Switching between phone calls on multiple trunks, Forwarding calls on lines – Siemens optiPoint 400 User Manual

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Switching between phone calls on multiple trunks, Forwarding calls on lines | Siemens optiPoint 400 User Manual | Page 91 / 119 Switching between phone calls on multiple trunks, Forwarding calls on lines | Siemens optiPoint 400 User Manual | Page 91 / 119
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