118 VoIP Subscriber Gateways
Fig. below shows an algorithm of 'Attended calltransfer' service operation.
Fig. 6 - 'Attended calltransfer' service operation algorithm
'Unattended calltransfer' service allows to put an online subscriber (Subscriber B) on hold with a
short clearback flash and dial another subscriber's number (Subscriber С). Call will be transferred
automatically when Subscriber A finishes dialling the number.
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