Dhcp Option - Yealink SIP-T58V/A Administrator's Manual

Administrator's Guide for SIP-T5 Series Smart Media Phones
Click Confirm to accept the change.
5.
A dialog box pops up to prompt that settings will take effect after a reboot.
Click OK to reboot the phone.
6.
To configure static DNS when DHCP is used via phone user interface:
Tap Settings->Advanced (default password: admin) ->Network->WAN Port->IPv4.
1.
Tap the Type field.
2.
Tap DHCP in the pop-up dialog box.
3.
Tap the Static DNS field.
4.
Tap Enabled in the pop-up dialog box.
5.
Enter the desired value in the Primary DNS and Secondary DNS field respectively.
6.
Tap to accept the change.
7.
The phone prompts you to reboot the phone.
Tap OK to reboot the phone.
8.
The settings will take effect after a reboot.

DHCP Option

DHCP provides a framework for passing information to TCP/IP network devices. Network and
other control information are carried in tagged data items that are stored in the options field of
the DHCP message. The data items themselves are also called options.
DHCP can be initiated by simply connecting the IP phone with the network. IP phones broadcast
DISCOVER messages to request the network information carried in DHCP options, and the
DHCP server responds with specific values in corresponding options.
The following table lists common DHCP options supported by IP phones.
Parameter
Subnet Mask
Time Offset
Router
Time Server
Domain Name
Server
Log Server
Host Name
24
DHCP Option
1 Specify the client's subnet mask.
Specify the offset of the client's subnet in seconds
2
from Coordinated Universal Time (UTC).
Specify a list of IP addresses for routers on the
3
client's subnet.
4 Specify a list of time servers available to the client.
Specify a list of domain name servers available to
6
the client.
Specify a list of MIT-LCS UDP servers available to
7
the client.
12 Specify the name of the client.
Description