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Yealink SIP-T27G Administrator's Guide

Yealink SIP-T27G
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Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
371
If it is set to a value greater than 0, the phone will wait the designated seconds before dialing out the
preset hotline number when you lift the handset, press the Speakerphone/off-hook key or press the
line key.
Note: Line key is not applicable to T19(P) E2/CP920 phones, handset and Speakerphone key are not
applicable to CP920 phones; the off-hook key is only applicable to CP920 phones.
Permitted
Values
Integer from 0 to 10
Default
4
Web UI
Features > General Information > Hotline Delay(0~10s)
Phone UI
Color Screen Phones:
Menu > Features > Others > Hot Line > Hotline Delay
Black-and-white Screen Phones:
Menu > Features > Hot Line > Hotline Delay
Off Hook Hot Line Dialing
For security reasons, the phones support off hook hot line dialing feature, which allows the phone to automatically
dial out the pre-configured number when you lift the handset, press the Speakerphone key or desired line key. The
SIP server may then prompts you to enter an activation code for call service. Only if you enter a valid activation
code, the phone will use this account to dial out a call successfully.
Off hook hot line dialing feature is configurable on a per-line basis and depends on the support from a SIP server.
The server actions may vary from different servers.
It is also applicable to the IP call and intercom call.
Note: Off hook hot line dialing feature limits the call-out permission of this account and disables the hotline feature. For
example, when the phone goes off-hook using the account with this feature enabled, the configured hotline number will not be
dialed out automatically.
Topic
Off Hook Hot Line Dialing Configuration
Off Hook Hot Line Dialing Configuration
The following table lists the parameters you can use to configure off hook hot line dialing.
Parameter
account.X.auto_dial_enable
[1]
<MAC>.cfg
Description
It enables or disables the phone to automatically dial out a pre-configured number when a user lifts
the handset, presses the Speakerphone/off-hook key or desired line key.
Note: Line key is not applicable to T19(P) E2/CP920 phones; handset and Speakerphone key are not
applicable to CP920 phones; the off-hook key is only applicable to CP920 phones.
Permitted
Values
0-Disabled
1-Enabled, the phone will dial out the pre-configured number (configured by “account.X.auto_dial_
num”).
Default
0
Parameter
account.X.auto_dial_num
[1]
<MAC>.cfg
Description
It configures the number that the phone automatically dials out when a user lifts the handset, presses
the Speakerphone/off-hook key or desired line key.
Note: It works only if “account.X.auto_dial_enable is set to 1 (Enabled). Line key is not applicable to

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Yealink SIP-T27G Specifications

General IconGeneral
MountingDesk/Wall
Handset typeWired handset
Product typeIP Phone
Product colorBlack, Gold
Wall mountableYes
Display diagonal3.66 \
Display resolution240 x 120 pixels
RJ-9 ports quantity2
USB 2.0 ports quantity1
Voice codecsCNG, G.711, G.722, G.723.1, G.726, G.729, G.729ab, VAD, iLBC
Dual-Tone Multi-Frequency (DTMF) modesSIP info
Lines quantity8 lines
Phonebook capacity1000 entries
Number of VoIP accounts6
Bluetooth-
Security algorithmsAES, MD5
Networking standardsIEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface typeGigabit Ethernet
Volume controlDigital
Operating temperature (T-T)-10 - 50 °C
Operating relative humidity (H-H)10 - 95 %
Cables includedLAN (RJ-45)
Number of handles included1 pc(s)
Harmonized System (HS) code85171800
Weight and Dimensions IconWeight and Dimensions
Depth210 mm
Width265 mm
Height170.5 mm

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