Yealink SIP-T20 User Manual download pdf (Page 111)

Troubleshooting

Activation/Deactivation on page 35.

 Check that the headset volume is adjusted to an appropriate level. Refer to Volume

on page 24.

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.

What is the difference between user name, register name and display name?

Both user name and register name are defined by the server. A user name is used to

identify the account while a register name matched with a password is used for

authentication if the server requires. Display name is the caller ID that will be displayed

on the callee’s LCD screen. Server configurations may override local configurations.

Why does the phone play a tone when there is a call on hold? How to disable it?

When there is a call on hold, the phone will play a hold tone every 30 seconds. Play hold

tone is enabled by default. Play hold tone and the interval of playing a hold tone are

configurable via web user interface only.

To configure play hold tone and play hold tone delay via web user interface:

1. Click on Features->General Information.

2. Select the Enabled or Disabled from the pull-down list of Play Hold Tone.

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Yealink SIP-T20 User Manual Page 111