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Examples
SIP Phone
Download the
configuration file
SIP Server Provisioning Server
SUBSCRIBE (multicast)
200 OK
Provisioning URL:
http://x.x.x.x/{MODEL}.cfg
NOTIFY
Body http://x.x.x.x/{MODEL}.cfg
HTTP GET x.x.x.x/{MODEL}.cfg
Conditions
• If SIP PnP is enabled, the device sends a multicast SIP SUBSCRIBE message each time it starts up and
waits a maximum of 5 seconds for a response.
• If there is no reply, the device gives up on SIP PnP.
2.2.1.2 DHCP Option 160/159/66
The device sends a DHCP REQUEST message with option 66,159, and 160 added to the parameter request
list (option 55).
The DHCP server on the LAN responds with the requested values for the specified configuration parameters
in a DHCP ACK message.
Example
SIP Phone
Download the
configuration file
DHCP Server Provisioning Server
DHCP Request
DHCP ACK
Provisioning URL:
http://x.x.x.x/{MODEL}.cfg
Option 169/159/66
http://x.x.x.x/{MODEL}.cfg
HTTP GET x.x.x.x/{MODEL}.cfg
38 Administrator Guide Document Version 2014-05
2.2.1 Automatic Discovery of the Provisioning URL