Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
393
Topics
Call Hold Configuration
Music on Hold (MoH) Configuration
Call Hold Configuration
The following table lists the parameters you can use to configure call hold.
Parameter
sip.rfc2543_hold <y0000000000xx>.cfg
Description
It enables or disables the phone to use RFC 2543 (c=0.0.0.0) outgoing hold signaling.
Permitted
Values
0-Disabled, SDP media direction attributes (such as a=sendonly) per RFC 3264 is used when placing
a call on hold.
1-Enabled, SDP media connection address c=0.0.0.0 per RFC 2543 is used when placing a call on
hold.
Default
0
Web UI
Features > General Information > RFC 2543 Hold
Parameter
account.X.hold_use_inactive
[1]
<MAC>.cfg
Description
It enables or disables the phone to use inactive outgoing hold signaling.
Note: It works only if “sip.rfc2543_hold" is set to 0 (Disabled).
Permitted
Values
0-Disabled, SDP media direction attribute “a=sendonly” is used when placing a call on hold.
1-Enabled, SDP media direction attribute “a=inactive” is used when placing a call on hold. RTP pack-
ets will not be sent or received.
Default
0
Parameter
features.play_hold_tone.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to play the call hold tone when you place a call on hold.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Web UI
Features > General Information > Play Hold Tone
Parameter
features.play_hold_tone.delay <y0000000000xx>.cfg
Description
It configures the time (in seconds) to wait for the phone to play the initial call hold tone.
If it is set to 30 (30s), the phone will wait 30 seconds to play the initial call hold tone after you place a
call on hold.
Note: It works only if “features.play_hold_tone.enable” is set to 1 (Enabled).
Permitted
Values
Integer from 3 to 3600
Default
30
Web UI
Features > General Information > Play Hold Tone Delay
Parameter
features.play_hold_tone.interval <y0000000000xx>.cfg
Description
It configures the time (in seconds) between subsequent call hold tones.
If it is set to 3 (3s) and “features.play_hold_tone.delay” is set to 30 (30s), the phone will begin to play a
hold tone after you place a call on hold for 30 seconds, and repeat the call hold tone every 3 seconds.

Yealink SIP-T57W Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Ethernet LAN	Yes
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Security algorithms	AES, HTTPS, MD5, SRTP
Networking standards	IEEE 802.11a, IEEE 802.11ac, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, 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	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
AC adapter input voltage	100 - 240 V
AC adapter output current	2 A
AC adapter output voltage	5 V
Volume control	Buttons
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Display diagonal	7 \
Display resolution	800 x 480 pixels
Front camera	No
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Voice codecs	G.722, G.723.1, G.726, G.729A, G.729B, iLBC

Weight and Dimensions

Depth	220 mm
Width	259.4 mm
Height	211 mm