IP Office DCHP Options

An external DHCP server, requires two options:

• Server Option: 242 - File server
  one or more settings as a comma separated string...
  eg: HTTPSRVR=xxxx, HTTPPORT=y, HTTPDIR=z
• Scope Option: 3 - Router
  the Gateway IP address for this scope.

Note: Option 3 is standard, Option 242 must be added:

• Select Server → IPV4, click Action → Set Predefined Options and Values → Add
• Name: FileOptions, Data type: String, Description: IP Phone Settings

Example:

From a Windows 2016 DHCP Server:

Basic Strings:

String	Description
HTTPSRVR=	HTTP file server DNS name or IP address.
HTTPPORT=	<server port #> (only required if not default: 80).
HTTPDIR=	<directory> with IP phone files (not required if root)
TLSSRVR=	HTTPS file server DNS name or IP address.
TLSPORT=	<server port #> (only required if not default: 443).
TLSDIR=	<directory> with IP phone files (not required if root)

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