About This Guide 
v 
About This Guide 
Thank you for choosing the SIP-T27G IP phone, an ultra-elegant Gigabit IP phone which is 
exquisitely designed to provide business telephony features, such as Call Hold, Call Transfer, 
Busy Lamp Field, Multicast Paging and Conference over an IP network. 
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-T27G 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 
The following sections are new: 
  Network Connection on page 20 
  Wireless Network Settings on page 24 
  Bluetooth Headset on page 72 
  Recording Using a USB Flash Drive on page 156 
Major updates have occurred to the following sections: 
  Feature Status Icons on page 3 
  Optional Accessories on page 15 
  Phone Installation on page 16 
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