Yealink SIP-T27G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
183
Default
0
Web UI
Features > General Information > DTMF Replace Tran
Parameter
features.dtmf.transfer <y0000000000xx>.cfg
Description
It configures the DTMF sequences to be transmitted to perform call transfer.
Valid values are: 0-9, *, # and A-E.
Note: It works only if “features.dtmf.replace_tran” is set to 1 (Enabled).
Permitted
Values
String within 32 characters
Default
Blank
Web UI
Features > General Information > Tran Send DTMF
Local DTMF Tone
Local DTMF tone allows the phones to play a local DTMF tone during an active call. If this feature is enabled, you
can hear the DTMF tone when pressing the IP phone’s keypad during a call.
Topic
Local DTMF Tone Configuration
Local DTMF Tone Configuration
The following table lists the parameter you can use to configure the local DTMF tone.
Parameter
features.play_local_dtmf_tone_enable <y0000000000xx>.cfg
Description
It enables or disables the phone to play a local DTMF tone.
Permitted
Values
0-Disabled
1-Enabled, you can hear the DTMF tone when pressing the phone’s keypad during a call.
Default
1
Web UI
Features > General Information > Play Local DTMF Tone
Voice Quality Monitoring (VQM)
Voice quality monitoring feature allows the phones to generate various quality metrics for listening quality and con-
versational quality. These metrics can be sent between the phones in RTCP-XR packets. These metrics can also be
sent in SIP PUBLISH messages to a central voice quality report collector. Yealink phones support two mechanisms
for voice quality monitoring: RTCP-XR and VQ-RTCPXR.
Topics
RTCP-XR
VQ-RTCPXR
RTCP-XR
The RTCP-XR mechanism, compliant with RFC 3611-RTP Control Extended Reports (RTCP XR), provides the met-
rics contained in RTCP-XR packets for monitoring the quality of calls. These metrics include network packet loss,
delay metrics, analog metrics, and voice quality metrics.
Topic
RTCP-XR Configuration

Yealink SIP-T27G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black, Gold
Wall mountable	Yes
Display diagonal	3.66 \
Display resolution	240 x 120 pixels
RJ-9 ports quantity	2
USB 2.0 ports quantity	1
Voice codecs	CNG, G.711, G.722, G.723.1, G.726, G.729, G.729ab, VAD, iLBC
Dual-Tone Multi-Frequency (DTMF) modes	SIP info
Lines quantity	8 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
Bluetooth	-
Security algorithms	AES, MD5
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Volume control	Digital
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	210 mm
Width	265 mm
Height	170.5 mm