Yealink SIP-T40G Administrator's Guide

Network Configurations
33
For T41P phones: SIP-T41P.
For T41S phones: SIP-T41S.
For T40P phones: SIP-T40P.
For T40G phones: SIP-T40G.
For T29G phones: SIP-T29G.
For T27G phones: SIP-T27G.
For T23P phones: SIP-T23P.
For T23G phones: SIP-T23G.
For T21(P) E2 phones: SIP-T21P_E2.
For T19(P) E2 phones: SIP-T19P_E2.
For CP920 phones: SIP-CP920.
Web UI
Features > General Information > DHCP Hostname
[1]
If you change this parameter, the phone will reboot to make the change take effect.
DHCP Option 120
DHCP option 120 is used by the SIP client to locate a SIP server or outbound proxy server.
Topic
DHCP Option 120 Configuration
DHCP Option 120 Configuration
The following table lists the parameter you can use to configure DHCP option 120.
Parameter
sip.dhcp.option120.mode <y0000000000xx>.cfg
Description
It configures whether to use DHCP option 120 for obtaining the outbound proxy server IP address.
Permitted
Values
0-Do not check with the DHCP server for the outbound proxy server IP address.
1-The value obtained from DHCP option 120 is used as outbound proxy server IP address (can
resolve up to two domain names or IPv4 addresses). If “account.X.outbound_proxy_enable = 1”, and
the primary outbound proxy server is configured, the address from DHCP option 120 is used as sec-
ondary one; if the primary outbound proxy server is not configured, the address from DHCP option
120 is used as the primary one.
2-The value obtained from DHCP option 120 is used as SIP server IP address (can resolve up to only
one IPv4 address). If the primary SIP server is configured, the address from DHCP option 120 is used
as secondary one; if the primary SIP server is not configured, the address from DHCP option 120 is
used as the primary one.
Default
0
DHCP Option 60
DHCP option 60 is used to indicate the vendor type. Servers can use option 43 to return the vendor-specific inform-
ation to the client.
You can set the DHCP option 60 type.
Topic
DHCP Option 60 Configuration

Yealink SIP-T40G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Wall mountable	Yes
Wi-Fi	No
Security algorithms	AES, HTTPS, SSL/TLS
Networking standards	IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP, TFTP, HTTP, HTTPS
Voice codecs	G.711, G.711a, G.711u, G.722, G.726, G.729ab
RJ-11 ports quantity	1
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)	1.6 W
Certification	CE, FCC, ISO 9001
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 90 %
Volume control	Digital
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	3 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	175 mm
Width	212 mm
Height	54 mm