Yealink SIP-T27G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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[2]
X is the PSTN account ID. X=1-2.
Distinctive Ring Tones
The feature of distinctive ring tones allows certain incoming calls to trigger the phones to play distinctive ring tones.
The IP phone inspects the INVITE request for an "Alert-Info" header when receiving an incoming call. If the INVITE
request contains an "Alert-Info" header, the phone strips out the URL or keyword parameter and maps it to the
appropriate ring tone.
Note: If the caller already exists in the local directory, the ring tone assigned to the caller should be preferentially played.
Topics
Supported Alert-Info Headers Format
Distinctive Ring Tones Configuration
Supported Alert-Info Headers Format
Yealink phones support Alert-Info headers in four formats: Bellcore-drN, ringtone-N (or MyMelodyN), <URL > and
info=info text;x-line-id=0.
Note: If the Alert-Info header contains multiple types of keywords, the phone will process the keywords in the following order:
AutoAnswer > URL > info text/Bellcore-drN/ringtone-N (ringtone-RingN) > MyMelodyN (MyMelodyRingN).
Topics
Alert-Info: Bellcore-drN
Alert-Info: ringtone-N/Alert-Info: ringtone-RingN.wav (or Alert-Info: MyMelodyN/Alert-Info: MyMelodyRingN.wav)
Alert-Info: <URL >
Alert-Info: info=info text;x-line-id=0
Alert-Info: Bellcore-drN
When the Alter-Info header contains the keyword “Bellcore-drN”, the phone will play the desired ring tone.
The following table identifies the corresponding ring tone:
Value of N
Ring Tone
(features.alert_info_tone = 1)
Ring Tone
(features.alert_info_tone = 0)
1 Bellcore-dr1 Ring1.wav
2 Bellcore-dr2 Ring2.wav
3 Bellcore-dr3 Ring3.wav
4 Bellcore-dr4 Ring4.wav
5 Bellcore-dr5 Ring5.wav
6 Ring6.wav
7 Ring7.wav
8 Ring8.wav
9 Silent.wav
10 Splash.wav
N<1 or N > 10 Ring1.wav

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