Why Does The Ip Phone Display "No Service; How Do I Find The Basic Information Of The Ip Phone; Why Doesn't The Ip Phone Upgrade Firmware Successfully; Why Doesn't The Ip Phone Display Time And Date Correctly - Yealink SIP-T2XP Administrator's Manual

Administrator's Guide for SIP-T2xP IP Phones

Why does the IP phone display "No Service"?

The LCD screen prompts "No Service" message when there is no available SIP account
on the IP phone.
Do one of the following:
Ensure that an account is actively registered on the IP phone at the path

Menu->Status->More->Accounts.
Ensure that the SIP account parameters have been set up correctly.


How do I find the basic information of the IP phone?

Press the OK key when the IP phone is idle to check the basic information (e.g., IP
address MAC address and firmware version).

Why doesn't the IP phone upgrade firmware successfully?

Do one of the following:
Ensure that the target firmware is not the same as the current firmware.

Ensure that the target firmware is applicable to the IP phone model.

Ensure that the current or the target firmware is not protected.

Ensure that the power is on and the network is available in the process of

upgrading.
Ensure that the web browser is not closed or refreshed when upgrading firmware

using the web user interface.

Why doesn't the IP phone display time and date correctly?

Check if the IP phone is configured to obtain the time and date from the NTP server
automatically. If your phone is unable to access the NTP server, configure the time and
date manually.

Why do I get poor sound quality during a call?

If you have poor sound quality/acoustics like intermittent voice, low volume, echo or
other noises, the possible reasons could be:
Users are seated too far out of recommended microphone range and sound faint,

or are seated too close to sensitive microphones and cause echo.
Intermittent voice is mainly caused by packet loss, due to network congestion, and

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