UCM6200 Series User Manual 
defined  in  web  UI->PBX->Internal  Options->General  page->Extension 
Preference section: "Auto Provision Extensions". 
If enabled, the extension list will be sent out to the device after receiving 
the device's request. This feature is for the GXP series phones that support 
selecting extension to be provisioned via phone's LCD. The default setting 
is disabled. 
Click on the link "Pick Extension Segment" to specify the extension list to 
be sent to the device. The default range is 4000 to 4999. Pick Extension 
Segment  range  can  be  defined  in  web  UI->PBX->Internal  Options-
>General page->Extension Preference section: "Pick Extensions". 
Pick Extension Period (hour) 
Specify the number of minutes to allow the phones being provisioned to 
pick extensions. 
This feature allows the UCM to provision devices in different subnets. 
The  devices  in  the  Subnet  Whitelist  can  be  provisioned  via  UCM  zero 
config. 
 
 
Please  make  sure  an  extension  is  manually  assigned  to  the  phone  or  "Automatically Assign  Extension"  is 
enabled  during  provisioning. After  the  configuration  on  the  UCM6200  web  GUI,  click  on  "Save"  and  "Apply 
Changes". Once the phone boots up and picks up the config file from the UCM6200, it will take the configuration 
right away. 
 
Discovery 
 
Users could manually discover the device  by specifying the IP address or  scanning the entire  LAN network. 
Three methods are supported to scan the devices. 
 
•  PING 
•  ARP 
•  SIP Message (NOTIFY) 
 
Click on "Auto Discover" under web UI-> PBX-> Zero Config->Zero Config, fill in the "Scan Method" and "Scan 
IP". The IP address segment will be automatically filled in based on the network mask detected on the UCM6200. 
If users need scan the entire network segment, enter 255 (for example, 192.168.40.255) instead of a specific IP 
address. Then click on "Save" to start discovering the devices within the same network. To successfully discover 
the  devices,  "Zero  Config"  needs  to  be  enabled  on  the  UCM6200  web  GUI->PBX->Zero  Config->Auto 
Provisioning Settings.