Yealink T27P Administrator's Guide

Administrator’s Guide for SIP-T2_Series_T4_Series IP Phones
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4. Click Confirm to accept the change.
Block out rule prevents users from dialing out specific numbers. When entered numbers
match the predefined block out rule, the LCD screen prompts “Forbidden Number”. IP
phones support up to 10 block out rules.
Procedure
Block out rule can be created using the configuration files or locally.
Configuration File
<y0000000000xx>.cfg
Create the block out rule for the
IP phone.
Parameters:
dialplan.block_out.number.X
dialplan.block_out.line_id.X
Local
Web User Interface
Create the block out rule for the
desired line.
Navigate to:
http://<phoneIPAddress>/servlet
?p=settings-blackout&q=load
Details of Configuration Parameters:
Parameters
Permitted Values
Default
dialplan.block_out.number.X
(X ranges from 1 to 10)
String within 32 characters
Blank
Description:
Configures the block out numbers.
Example:
dialplan.block_out.number.1 = 4321
Web User Interface:
Settings->Dial Plan->Block Out->BlockOut NumberX
Phone User Interface:
None
dialplan.block_out.line_id.X
(X ranges from 1 to 10)
Refer to the following
content
Blank (for all
lines)
Description:

Yealink T27P Specifications

General

Wall Mountable	Yes
Local Phonebook	1000 entries
Bluetooth	No
Wi-Fi	No
Gigabit Ethernet	No
Display	3.66" 240x120 pixel graphical LCD with backlight
Audio Features	HD voice, Full-duplex speakerphone
Network	Dual-port 10/100 Ethernet switch
Protocols	SIP v1 (RFC2543), v2 (RFC3261)
Power	IEEE 802.3af PoE
Connectivity	2 x RJ45 10/100M Ethernet ports
Voice Codecs	G.711(A/μ), G.722, G.723, G.729AB, G.726
EHS	Supports EHS with Plantronics headsets
Headset Port	Yes
Power Adapter	5V DC (optional)