Yealink SIP-T27G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Web UI
Account > Advanced > DTMF Payload Type(96~127)
Parameter
account.X.dtmf.info_type
[1]
<MAC>.cfg
Description
It configures the DTMF info type.
Note: It works only if “account.X.dtmf.type” is set to 2 (SIP INFO) or 3 (RFC2833 + SIP INFO).
Permitted
Values
1-DTMF-Relay
2-DTMF
3-Telephone-Event
Default
1
Web UI
Account > Advanced > DTMF Info Type
Parameter
features.dtmf.repetition <y0000000000xx>.cfg
Description
It configures the repetition times for the phone to send the end RTP Event packet during an active call.
Permitted
Values
1, 2 or 3
Default
3
Web UI
Features > General Information > DTMF Repetition
Parameter
features.dtmf.duration
[2]
<y0000000000xx>.cfg
Description
It configures the duration time (in milliseconds) for each digit when a sequence of DTMF tones is
played out automatically.
Note: If the time interval between two DTMF digits is less than this value, two or more same DTMF
digits could be identified as one DTMF digit. This may cause the loss of one or more DTMF digits. For
example, 2662 may be identified as 262. If so, you can modify the value of this parameter to a little
lower than the default value.
Permitted
Values
Integer from 0 to 700
Default
100
Parameter
features.dtmf.volume <y0000000000xx>.cfg
Description
It configures the volume of the DTMF tone (in dB).
Permitted
Values
Integer from -33 to 0
Default
-10
Parameter
features.dtmf.min_interval <y0000000000xx>.cfg
Description
It configures the minimum inter-digit time (in milliseconds) between digits when a sequence of DTMF
tones is played out automatically.
Permitted
Values
Integer from 0 to 300
Default
50

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