Yealink SIP-T40P User Manual page 161

Activation/Deactivation
Check that the headset volume is adjusted to an appropriate level. Refer to

on page 29.
W hat 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 configuration may override the local configuration.
W hy does t he phone play a tone when t here is a call on hold? How to disable it?
When there is a call on hold, the phone will play a hold t one every 30 seconds. Call hold
tone is enabled by default. Call hold tone and the interval of playing a hold tone are
configurable via web user interface only.
To configure call hold tone and call hold tone delay via web user interface:
1. Click on F e atures->General Information.
2. Select the desired value from the pull-down list of P lay Hold Tone.
3. Enter the desired time in the P lay Hold Tone Delay field.
4. Click Conf irm to accept the change.
W hy can't I send an SMS to any other phone?
depends on support from a SIP server.
SMS
information.
on page 50.
Contact your system administrator for more
Troubleshooting
Volume
151