Yealink SIP-T53W Administrator's Guide

Call Features
392
Parameter
phone_setting.call_appearance.calls_per_linekey <y0000000000xx>.cfg
Description
It configures the maximum number of concurrent calls per line key for all registered lines.
If it is set to 0, there is no limit for the number of concurrent calls.
Example:
phone_setting.call_appearance.calls_per_linekey = 2
It means that you can have up to two concurrent calls per line key on the IP phone.
Note: The value configured by the parameter “account.X.phone_setting.call_appearance.calls_per_
linekey” takes precedence over that configured by this parameter.
Permitted
Values
Integer from 0 to 24
Default
0
Supported
Devices
All phones except T19(P) E2 and CP920
Parameter
account.X.phone_setting.call_appearance.calls_per_linekey
[1]
<MAC>.cfg
Description
It configures the maximum number of concurrent calls per line key for a specific line.
If it is set to 0, there is no limit for the number of concurrent calls.
Example:
account.1.phone_setting.call_appearance.calls_per_linekey = 2
It means that you can have up to two concurrent calls per line key associated with account 1.
Note: The value configured by this parameter takes precedence over that configured by the parameter
“phone_setting.call_appearance.calls_per_linekey”.
Permitted
Values
Integer from 0 to 24
Default
Blank
Supported
Devices
All phones except T19(P) E2 and CP920
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42U/T42G/T42S, X=1-12; for T41P/T41S/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21
(P) E2, X=1-2.
Call Hold
Call hold provides a service of placing an active call on hold. It enables you to pause activity on an active call so
that you can use the phone for another task, for example, to place or receive another call.
When a call is placed on hold, the phones send an INVITE request with HOLD SDP to request remote parties to
stop sending media and to inform them that they are being held. The phones support two call hold methods, one is
RFC 3264, which sets the “a” (media attribute) in the SDP to sendonly, recvonly or inactive (for example, a=se-
endonly). The other is RFC 2543, which sets the “c” (connection addresses for the media streams) in the SDP to
zero (for example, c=0.0.0.0).
When you place an active call on hold or the call is held by remote parry, a call hold tone or held tone alerts you
after a specific period of time that a call is still on hold or is still held by the remote party. You can configure the call
hold tone and held tone.
If supported by the server, you can also configure a music-on-hold URI.

Yealink SIP-T53W Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP mobile phone
Product color	Gray
Keypad illumination	Yes
Wi-Fi standards	802.11a, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version	4.2
Security algorithms	AES, HTTPS, SIPS
Networking standards	IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP/TFTP/HTTP/HTTPS
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Lines quantity	8 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	12
AC adapter input voltage	100 - 240 V
AC adapter output current	1.2 A
AC adapter output voltage	5 V
Power consumption (typical)	2.3 W
Volume control	Buttons
Number of programmable keys	8
Storage temperature (T-T)	-30 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Display diagonal	3.7 \
Display resolution	360 x 160 pixels
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Number of DECT wireless handsets	4
Voice codecs	G.722, G.723.1, G.726, G.729A, G.729B, OPUS, iLBC

Weight and Dimensions

Depth	210.6 mm
Width	212 mm
Height	174.5 mm