Baudcom 128FXS, User Manual, Page: 32 / 88

BD-VOIP-128S User Manual
4 Configurations on Web Interface
Website: www.baudcom.com.cn
Email: info@baudcom.com.cn
27
Network Setting Set a DHCP IP address or static IP address for a VLAN, and set
the IP address of the DNS server used by the VLAN.
Note
：
After the configurations are finished, you need to restart the device for the
configurations to take effect.
4.5.3
DHCP Option
When the BD-VOIP-128S device works as a DHCP client and applies for an IP address,
DHCP server will return packets which include an IP address as well as configuration
information of enabled option fields.
The following is the meaning of the option fields involved in BD-VOIP-128S (that means the
following option fields are enabled, DHCP server will return information of corresponding
option fields:

Option 15: to set a DNS suffix;

Option 42: to specify NTP server;

Option 60: to define VCI (vendor class identifier) of BD-VOIP-128S on the DHCP server;

Option 66: to specify TFTP server which will assign software version to BD-VOIP-128S;

Option 120: to fetch SIP server address;

Option 121: to obtain classless static route. BD-VOIP-128S will add these static routes to
the static route table after it fetches them from DHCP server.
Figure 4-8 Configure DHCP Option
Network Interface: choose which VLAN to send request to DHCP server (or to receive
information from DHCP server).