Yealink SIP-T21 E2 User Manual page 23

Power Adapter

Headset

Note
We recommend that you use the accessories provided or approved by Yealink. The use
of unapproved third-party accessories may result in reduced performance.
If your phone is already installed, proceed to
This section introduces how to install the phone:
1) Attach the stand
2) Connect the handset and optional headset
3) Connect the network and power
Phone Initialization on page 16.
Getting Started
13