Yealink SIP- T28P User Manual

Getting Started
13
Power over Ethernet
With the included or a regular Ethernet cable, the SIP-T28P IP phone can be powered
from a PoE-compliant switch or hub.
To connect the PoE:
1. Connect the Ethernet cable between the Internet port on the phone and an
available port on the in-line power switch/hub.
Note
After your phone is powered on, the system boots up and performs the following steps:
Automatic Phone Initialization
The phone finishes the initialization by loading the saved configuration. The LCD screen
displays “Initializing, Please Wait” during this process.
DHCP (Dynamic Host Configuration Protocol)
The phone attempts to contact a DHCP server in your network to obtain valid network
settings (e.g., IP address, subnet mask, default gateway address and DNS address) by
default.
Note
If in-line power is provided, you don’t need to connect the phone to the power adapter.
Make sure the switch/hub is PoE-compliant.
The phone can also share the network with another network device such as a PC
(personal computer). This is an optional connection.
Important! Do not remove power to the phone while it is updating firmware and
configurations.
If your network does not use DHCP, proceed to Basic Network Settings on page 15.

Yealink SIP- T28P Specifications

General

Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Keypad number of keys	48
Voice codecs	G.711, G.722, G.723.1, G.726
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Touchscreen	-
Display resolution	320 x 160 pixels
Lines quantity	- lines
Phonebook capacity	- entries
Number of VoIP accounts	6
Bluetooth	No
Security algorithms	HTTPS, SSL/TLS
AC adapter input voltage	100 - 240 V
AC adapter output voltage	5 V
Power consumption (typical)	2.6 W
Operating relative humidity (H-H)	10 - 95 %
Compliance industry standards	IEEE 802.3af
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	204 mm
Width	273 mm
Height	42 mm
Weight	1050 g