Yealink T40G Administrator's Guide

Phone Network
17
For T52S IP phones: SIP-T52S.
For T48G IP phones: SIP-T48G.
For T48S IP phones: SIP-T48S.
For T46G IP phones: SIP-T46G.
For T46S IP phones: SIP-T46S.
For T42G IP phones: SIP-T42G.
For T42S IP phones: SIP-T42S.
For T41P IP phones: SIP-T41P.
For T41S IP phones: SIP-T41S.
For T40P IP phones: SIP-T40P.
For T40G IP phones: SIP-T40G.
For T29G IP phones: SIP-T29G.
For T27P IP phones: SIP-T27P.
For T27G IP phones: SIP-T27G.
For T23P IP phones: SIP-T23P.
For T23G IP phones: SIP-T23G.
For T21(P) E2 IP phones: SIP-T21P_E2.
For T19(P) E2 IP phones: SIP-T19P_E2.
Web UI
Features->General Information->DHCP Hostname
[1]
If you change this parameter, the IP phone will reboot to make the change take effect.
DHCP Option 120
The DHCP option 120 is used by the SIP client to locate a local 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

Yealink T40G Specifications

General

SIP Accounts	3
Wall Mountable	Yes
Opus Codec	No
Display	2.3 inch 132x64-pixel graphical LCD
Network	Dual-port Gigabit Ethernet
PoE	Yes
Headset Support	Yes, RJ9 port
Power Adapter	Optional
Voice Codecs	G.722, G.711(A/μ), G.729AB, G.726
Local Phonebook	1000 entries