Knowledge Base - Yealink SIP-T21P-E2

Yealink

Supported Yealink VoIP phones.

Yealink T21P-E2

Yealink T21P-E2 Specifications
Default Account / Line Backgrounds Colors on desk phones [Yealink]
How do I transfer calls? [Yealink]
Enable / Disable Call Waiting on phone setting [Yealink]
Rebooting or restarting a desk or conference phone. [Yealink]
Factory resetting a Yealink desk or conference phone
Determining the IP address on a Desk, Cordless, or Conference Phone [Yealink]
Editing one touch dials (DSS or Line Keys) on Desk Phones [Yealink]
Connecting to the phone with a web browser (e.g., Chrome) [Yealink]
How do I use Call Forwarding? [Yealink]
How do I adjust call volume and muting? [Yealink]
How do I redial? [Yealink]
How do I use call History [Yealink]
How do I view and return missed calls? [Yealink]
How do I update configuration / provisioning? [Yealink]
!!! Local Personal Directory [Yealink]
Basic Menu Navigation [Yealink]
Receiving and Managing Multiple Calls [Yealink]
Consulting without Transfer [Yealink]
How do I place a three-way (3-way or N-Way) conference call? [Yealink]
Setting up a TP-Link TL-POE150S PoE injector (Video)
PoE Injector - what is it good for? (Video)

General Phone

General Telephone System Support Articles

Message Center / Voicemail

Information on the Message Center / Voicemail system and options.

Message Center (Voicemail) Setup
Accessing your Message Center (Voicemail)
Message Center (Voicemail) to Email Options
What is the difference between Call Forwarding, Find Me, and Follow Me?
VM2TEXT (Voicemail Transcription) Optional Service
VM2SMS (Voicemail to SMS) Optional Service
VM2SMS Message Formats
Voicemail Stats Report
Voicemail PIN Complexity Requirements

Feature Codes

Information on published system feature codes.

*41 / *42 How do I silence the music on hold?
**xxxxx How do I answer someone else's line? Directed Call Pick Up
*70 / *71 How do I enable / disable Call Waiting?
*78 / *79 How do I enable / disable Do Not Disturb?
*65 What's my extension / mailbox?
*67 / *68 Outbound Caller ID Blocking
How do I use a Conference Bridge?
How do I use the Keypad and Buttons with Menus?
ACD / Queue Options
Alarm Monitoring & VoIP
Can my phone behave differently "after hours"? Or for holidays?
Applying VoIP 911 Labels On Your Phone
Making International Calls
Self Serve Management (Tools->PhoneOpts)
Porting explained / required information and steps
Hosted VoIP vs. SIP Trunk - what's the difference?
What is a Conference Bridge?
Power Adapters - working from home

Internet

Internet Information, Access and Support

Estimating Internet data transfer & call capacity
Megabyte (MB) & Gigabyte (GB) vs. Mebibyte (MiB) & Gibibyte (GiB)
Understanding bits (b) vs Bytes (B)