User Guide SIP-T20P IP Phone
88
Why can I not receive calls?
Check the SIP registration with your system administrator.
Check DND (Do Not Disturb) mode is turned off on your phone. Refer to
Do Not
Disturb (DND)
on page
53
.
Check call forward feature is disabled on the phone. Refer to
Call Forward
on
page
55
.
Check whether the caller number is stored in the blacklist directory. Refer to
Blacklist
on page
28
.
Why is my handset not working?
Check to ensure that the handset cord is fully connected to both the handset jack on the
phone and handset. Refer to
Phone Installation
on page
11
.
Why is my headset not working?
Check to ensure that the headset cord is fully connected to the headset jack on the
phone. Refer to
Phone Installation
on page
11
.
Check to ensure that the headset mode is activated. Refer to
Headset
Activation/Deactivation
on page
30
.
Check to ensure that the headset volume is adjusted to an appropriate level. Refer
to
Volume
on page
22
.
What will happen if I connect both PoE cable and power adapter? Which has the
priority?
The phones manufactured before February 2010 use the power adapter preferentially,
otherwise the phones use PoE preferentially.
How to change the user password?
You can change the user password via web user interface:
1.
Click on Security->Password.
2.
Enter the current user password in the Current Password field.
3.
Enter the new user password in the New Password and Confirm Password fields.
4.
Click Confirm to accept the change.
You can also contact your system administrator for help.
How to reboot the phone?
To reboot the IP phone via web user interface:
1.
Click on Upgrade->Basic.
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