Polycom 4300T - Manual (Page 39)

Configuring the 4300T
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In addition the 4300T will provide its LAN IP address in DHCP user options
150 and 151 for use by IP phones. Some IP phones use these values for
configuration of their TFTP server and MGCP control server addresses.
You can also enable or disable the 4300T DHCP server on a per VLAN basis.
1. Select DHCP Server.
2. If you are using VLANs select the desired VLAN ID from the drop down
menu.
3. The default value for the DHCP server is disabled. Click the top
checkbox to enable or disable the internal DHCP server (default is
disabled). If you are using VLANs select the desired VLAN ID.
4. Enter the Lease Duration.
The lease duration is the amount of time in days that an IP device may use
an assigned IP address before requesting that it be renewed. The default
value is 7 days and the valid range of input is 1 to 30 days.
5. Enter the Subnet Mask.
This is the subnet mask that will be sent via DHCP to the requesting IP
devices.
6. Enter the DHCP IP Addresses.
This is the pool of IP addresses that will be provided to the requesting IP
devices. You can enter both individual IP addresses or a range of
addresses using the following format:
192.168.1.2 (single address)
192.168.1.4-10 (address range 192.168.1.4 through 192.168.1.10)
7. Enter the Time Offset (DHCP user option 2).
8. Set the time offset in hours from UTC for your local location. This value
is optional; if supplied, it will be delivered to clients.
9. Enter the NTP Server Address (DHCP user option 42).
This is the IP address of a Network Time Server. This value is optional; if
supplied, it will be delivered to clients.
10. Enter the WINS Address.
Note The DHCP server in the 4300T should not be used if a DHCP server already exists
in the same subnet as the 4300T. Also, it is recommended that you assign static IP
addresses for common-access devices such as network printers or fax machines.
Note The range format can only be used for class C addresses (those with a subnet
mask of 255.255.255.0).