Yealink SIP-T21 E2 Administrator's Guide

Configuring Basic Features
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4. Enter the desired number of hidden digits in the PswLength field.
5. Click Confirm to accept the change.
Unregister When Reboot
Unregister when reboot feature allows IP phones to unregister first before re-registering the
account when finishing a reboot.
Procedure
Unregister when reboot can be configured using the following methods.
Central Provisioning
(Configuration File)
<MAC>.cfg
Configure unregister when reboot.
Parameter:
account.X.unregister_on_reboot
Web User Interface
Configure unregister when reboot.
Navigate to:
http://<phoneIPAddress>/servlet?p
=account-adv&q=load&acc=0
Details of the Configuration Parameter:
Parameter
Permitted Values
Default
account.X.unregister_on_reboot
0 or 1
0
Description:
Enables or disables the IP phone to unregister first before re-registering account X when

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English