Call Transfer - Yealink SIP-T54S Administrator's Manual

Call Transfer

Call transfer enables IP phones to transfer an existing call to a third party. For example, if party
A is in an active call with party B, party A can transfer this call to party C (the third party). Then,
party B will begin a new call with party C and party A will disconnect.
IP phones support call transfer using the REFER method specified in
types of transfer:
Blind Transfer -- Transfer a call directly to another party without consulting. Blind transfer

is implemented by a simple REFER method without Replaces in the Refer-To header.
Semi-attended Transfer -- Transfer a call after hearing the ringback tone. Semi-attended

transfer is implemented by a REFER method with Replaces in the Refer-To header.
Attended Transfer (Consultative Transfer) -- Transfer a call with prior consulting.

Attended transfer is implemented by a REFER method with Replaces in the Refer-To
header.
Normally, call transfer is completed by pressing the transfer key. Blind transfer on hook and
attended transfer on hook features allow the IP phone to complete the transfer through on-
hook.
When a user performs a semi-attended transfer, semi-attended transfer feature determines
whether to display the prompt "n New Missed Call(s)" ("n" indicates the number of the missed
calls) on the destination party's phone LCD screen.
Procedure
Call transfer can be configured using the following methods.
Central
Provisioning
(Configuration
File)
Web User Interface
<y0000000000xx>.cfg
Configuring Basic Features
RFC 3515
Specify whether to complete the
transfer through on-hook.
Parameters:
transfer.blind_tran_on_hook_enable
transfer.on_hook_trans_enable
Configure semi-attended transfer
feature.
Parameter:
transfer.semi_attend_tran_enable
Specify whether to complete the
transfer through on-hook.
Configure semi-attended transfer
feature.
Navigate to:
http://<phoneIPAddress>/servlet?p=f
eatures-transfer&q=load
and offer three
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