User Guide

About This Guide
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About This Guide
Thank you for choosing the SIP-T21 E2/SIP-T21P E2 (hereinafter referred to as SIP-T21(P) E2) IP
phone, exquisitely designed to provide business telephony features, such as Call Hold, Call
Transfer, Busy Lamp Field, Multicast Paging and Conference over an IP network. The difference
between the SIP-T21 E2 and SIP-T21P E2 IP phones is that only SIP-T21P E2 supports PoE.
This guide provides everything you need to quickly use your new phone. First, verify with your
system administrator that the IP network is ready for phone configuration. Also be sure to read
the Packaging Contents in this guide before you set up and use the SIP-T21(P) E2 IP phone.
See the Yealink Products Regulatory Notices guide for all regulatory and safety guidance.
In This Guide
Topics provided in this guide include:
 Chapter 1 Overview
 Chapter 2 Getting Started
 Chapter 3 Customizing Your Phone
 Chapter 4 Basic Call Features
 Chapter 5 Advanced Phone Features
Summary of Changes
This section describes the changes to this guide for each release and guide version.
Changes for Release 81, Guide Version 81.90
Major updates have occurred to the following section:
 Volume on page 46
Changes for Release 81, Guide Version 81.70
The following section is new:
 Parking a Call/Retrieving a Parked Call to the Monitored User on page 138
Major updates have occurred to the following sections:
 Entering Data and Editing Fields on page 32