Yealink T40G Administrator's Guide

Call Features
345
Permitted
Values
0-Disabled, DND is performed on server side only.
1-Enabled, DND is performed on both server side and locally.
Default
Blank
[1]
X is the account ID. For T54S/T48S/T48G/T46S/T46G/T29G, X=1-16; for T52S/T42G/T42S, X=1-12; for
T41P/T41S/T27P/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21(P) E2, X=1-2.
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.
Yealink IP phones support call transfer using the REFER method specified in RFC 3515 and offer three
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.
Semi-attended transfer is applicable to that when users do not want to consult with the third party
after hearing the ringback tone, and the third party has not answer the call, the users can cancel
transfer or implement transfer.
 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.
Topics
Call Transfer Configuration
Transfer Mode for Dsskey Configuration
Call Transfer Configuration
The following table lists the parameters you can use to configure call transfer.
Parameter
transfer.semi_attend_tran_enable
<y0000000000xx>.cfg
Description
It enables or disables the semi-attended transfer.
Permitted
Values
0-Disabled, when the user presses the Trans/Transfer soft key after hearing the
ringback tone, the IP phone will blind transfer the call.
1-Enabled, when the user presses the Trans/Transfer soft key after hearing the
ringback tone, the IP phone will transfer the call after the transferee answers the call.
Default
1

Yealink T40G Specifications

General

SIP Accounts	3
Wall Mountable	Yes
Opus Codec	No
Display	2.3 inch 132x64-pixel graphical LCD
Network	Dual-port Gigabit Ethernet
PoE	Yes
Headset Support	Yes, RJ9 port
Power Adapter	Optional
Voice Codecs	G.722, G.711(A/μ), G.729AB, G.726
Local Phonebook	1000 entries