User's Manual Part 1
Firmware Version 1.0.0.1  UCM6200 Series IP PBX User Manual  Page 88 of 320
Figure 62: UCM6200 Zero Config 
  SIP SUBSCRIBE 
When the phone boots up, it sends out SUBSCRIBE to a multicast IP address in the LAN. The 
UCM6200 discovers it and then sends a NOTIFY with the XML config file URL in the message body. 
The phone will then use the path to download the config file generated in the UCM6200 and take the 
new configuration. 
  DHCP OPTION 66 
This method should be used on the UCM6202/UCM6204 because only the UCM6202/UCM6204 have 
WAN and LAN port with LAN port supporting the router function. When the phone restarts (by default 
DHCP Option 66 is turned on), it will send out a DHCP DISCOVER request. The UCM6202 receives it 
and returns DHCP OFFER with the config server path URL in Option 66, for example, 
https://192.168.2.1:8089/zccgi/. The phone will then use the path to download the config file generated 
in the UCM6200. 
  mDNS 










