Yealink SIP-T33P Administrator's Guide

Advanced Features
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Example: Capturing the Current Screen of the Phone
Example: Placing a Call via Web User Interface
Supported HTTP/HTTPS GET Request
Opposite to action URL, action URI allows the phones to interact with a web server application by receiving and
handling an HTTP or HTTPS GET request. When receiving a GET request, the phone will perform the specified
action and respond with a 200 OK message.
A GET request may contain a variable named as “key” and a variable value, which are separated by “=”. The valid
URI format is: http(s)://<phoneIPAddress>/servlet?key=variable value. For example http://10.3.20.10/ser-
vlet?key=OK.
Note: Yealink phones are compatible with other two old valid URI formats: http(s)://<phoneIPAddress>/cgi-bin/Con-
figManApp.com?key=variable value and http(s)://<phoneIPAddress>/cgi-bin/cgiServer.exx?key=variable value.
For security reasons, the phones do not handle HTTP/HTTPS GET requests by default. You need to specify the trus-
ted IP address for action URI. When the IP phone receives a GET request from the trusted IP address for the first
time, the phone screen prompts the message “Allow remote control?”. Select the OK soft key on the phone to allow
remote control. You can specify one or more trusted IP addresses on the IP phone, or configure the IP phone to
receive and handle the URI from any IP address.
Supported SIP Notify Message
In addition, Yealink phones can perform the specified action immediately by accepting a SIP NOTIFY message with
the “Event: ACTION-URI” header from a SIP proxy server. The message body of the SIP NOTIFY message may con-
tain a variable named as “key” and a variable value, which are separated by “=”.
This method is especially useful for users who always work in the small office/home office where a secure firewall
may prevent the HTTP or HTTPS GET request from the external network.
Note: If you want to only accept the SIP NOTIFY message from your SIP server and outbound proxy server, you have to
enable the Accept SIP Trust Server Only feature. For more information, refer to Accept SIP Trust Server Only.
If you use SIP NOTIFY message method, you do not need to specify the trusted IP address for action URI. However,
you should enable the IP phone to receive the action URI requests. When the IP phone receives a SIP NOTIFY mes-
sage with the “Event: ACTION-URI” header from a SIP proxy server for the first time, the LCD screen also prompts
the message “Allow remote control?”. Select the OK soft key on the phone to allow remote control.
Example of a SIP Notify with the variable value (OK):
Message Header
NOTIFY sip:3583@10.2.40.10:5062 SIP/2.0
Via: SIP/2.0/UDP 10.2.40.27:5063;branch=z9hG4bK4163876675
From: <sip:3586@10.2.1.48 > ;tag=2900480538
To: "3583" <sip:3583@10.2.1.48 > ;tag=490600926
Call-ID: 2923387519@10.2.40.10
CSeq: 4 NOTIFY
Contact: <sip:3586@10.2.40.27:5063 >
Max-Forwards: 70
User-Agent: Yealink SIP-T46G
Event: ACTION-URI
Content-Type: message/sipfrag

Yealink SIP-T33P Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Wall mountable	Yes
Operating system installed	Linux
Lines quantity	4 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	4
Volume control	Buttons
Number of function keys	5
Display diagonal	2.4 \
Display resolution	320 x 240 pixels
Voice codecs	AGC, AJB, CNG, G.711a, G.711u, G.722, G.723.1, G.726, G.729, G.729A, PLC, VAD, iLBC
Security algorithms	AES, HTTPS
Ethernet LAN data rates	10, 100 Mbit/s
Ethernet LAN interface type	Fast Ethernet
RJ-9 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Input frequency	50/60 Hz
AC adapter input voltage	100 - 240 V
Power consumption (typical)	3 W
Power consumption (Power over Ethernet (PoE))	5 W
Number of handles included	1 pc(s)
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %

Weight and Dimensions

Depth	186 mm
Width	212 mm
Height	146 mm