Yealink SIP-T23G Auto Provisioning Guide

Obtaining the Provisioning Server Address
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The following figure shows the example messages of obtaining the TFTP server address from an
IPv4 custom DHCP option:
Right click the root node of the custom option (e.g., option 128) shown on the above figure, and
select Copy->Bytes->Printable Text Only. Paste the copied text in your favorite text editor to
check the address, for example, tftp://192.168.1.100/.
Phone Flash
Yealink IP phones can obtain the provisioning server address from the IP phone flash. To obtain
the provisioning server address by reading the IP phone flash, make sure the configuration is set
properly.
To configure the IP phone flash via web user interface:
1. Click on Settings->Auto Provision.

Yealink SIP-T23G Specifications

General

Backlight	Yes
Voice codecs	G.711a, G.722.2, G.726, G.729ab, iLBC
Volume control	Digital
Handset type	Wired handset
Product type	IP Phone
Product color	Black, Silver
Display resolution	132 x 64 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Networking standards	IEEE 802.1p, IEEE 802.1Q, IEEE 802.1x, IEEE 802.3af
Ethernet LAN (RJ-45) ports	2
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	1.56 W
Number of handles included	- pc(s)
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %

Weight and Dimensions

Depth	188 mm
Width	209 mm
Height	150 mm