ELTEX TAU-4.IP User Manual

119 VoIP Subscriber Gateways
Figure below shows an algorithm of 'Unattended calltransfer' service operation.
Fig. 7 - 'Unattended calltransfer' service operation algorithm
'Local Calltransfer' service allows to transfer the call within the gateway without external REFER
message sending in case when Subscriber C is local TAU subscriber and call was made directly, without
proxy server. If subscriber C is an external subscriber or local one that has been dialed using proxy
server, 'Local Calltransfer' service performs as 'Attended Calltransfer', i.e. call transfer is carried out by
sending the REFER message to subscriber B.
4.2 Call Waiting
This service allows informing 'busy' users about new incoming calls with a special signal.
Upon receiving this notification, a user can answer or reject a waiting call.

ELTEX TAU-4.IP Specifications

General

Brand	ELTEX
Model	TAU-4.IP
Category	Gateway
Language	English