Dhcp Option 120; Dhcp Option 120 Configuration - Yealink SIP-T5 Series Administrator's Manual

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
Description It configures whether to use DHCP option 120 for obtaining the outbound proxy server IP address.
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-
Permitted
ondary one; if the primary outbound proxy server is not configured, the address from DHCP option
Values 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
<y0000000000xx>.cfg
Network Configurations
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