Polycom 1725-11530-310 manual Dhcp on page C-23, Name Possible Values Description

					Setting up Your System
		Possible
Name		Values		Description
VLAN Discovery		0=Disabled		No VLAN discovery through DHCP.
		(default)
		1=Fixed		Use predefined DHCP vendor-specific option values of 128,
				144, 157 and 191. If this is used, the VLAN ID Option field will
				be ignored
		2=Custom		Use the number specified in the VLAN ID Option field as the
				DHCP private option value.
VLAN ID Option		128 through 254		The DHCP private option value (when VLAN Discovery is set
		(Cannot be the		to Custom).
		same as Boot		For more information, refer to Assigning a VLAN ID Using
		Server Option)		DHCP on page C-23.
		(default is 129)
Note
			If multiple alternate DHCP servers respond:
			• The phone should gather the responses from alternate DHCP servers.
			• If configured for Custom+Option66, the phone will select the first response that
			contains a valid "custom" option value.
			• If none of the responses contain a "custom" option value, the phone will select
			the first response that contains a valid “option66” value.
			Server Menu
			The following server configuration parameters can be modified on the Server
			menu:
Name	Possible Values				Description
Server Type	0=FTP, 1=TFTP, 2=HTTP,				The protocol that the phone will use to obtain
	3=HTTPS, 4=FTPS, 5=Invalid				configuration and phone application files from the boot
					server. Refer to Supported Provisioning Protocols on
					page 3-4.
					Note: Active FTP is not supported for bootROM version
					3.0 or later. Passive FTP is still supported.
					Note: Only implicit FTPS is supported.

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