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;; in the example.com. zone file
_pltconfig._tcp
If this lookup is successful, the response will contain an ordinary hostname, its IP
address, and a port number. The IP40 then uses HTTP (Hyper Text Transfer Protocol)
to fetch its configuration file from the server at the address and port number in the DNS
response. The path in the request is '/Config' and the filename is the MAC address of
the IP40 (in lowercase with no separator symbols) plus the extension '.cfg'.
GET /Config/00087b06d15f.cfg HTTP/1.1
Host: config.example.com:8080
This process is also shown in the following diagram, assuming the MAC address of the
unit is 00:08:7B:06:D0:D6.
IP40
DHCP Discover
DHCP Request
DHCP Offer
DHCP ACK
(domain = example.com)
DNS Request: SRV _pltconfig._tcp.example.com
DNS Response: config.example.com port 8080
HTTP GET http://config.example.com:8080/Config/00087b06d0d6.cfg
HTTP: 200 OK (with configuration file)
Figure 5 Configuration Process
3.2 Configuration File Format
The format of the configuration file is a structured text file. An example of the file
structure for a minimal configuration is contained in section 6.9 Settings Page.
Each line contains the name of a configurable item and its value in the following format.
At the beginning of each line, before the name of the configurable item, is a percent
symbol (%). The name of the configurable item will be in uppercase letters, numerals,
and underscores. The name is followed by a percent symbol (%) and then a colon
character (:). If the type of parameter has an integer, Boolean, or enumerated value, the
5/29/2009
IN SRV 0 1 config.example.com. 8080
DHCP Server
Plantronics IP40 Administration Guide
DNS Server
HTTP Server
Page 13
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