How to tell if phone is pulling config from option 66

Quick Way

• If you setup a phone to pull a config from your PBX and its never hitting the PBX for a config file most likely you have option 66 enabled on your network which overrides what the phone has for a config server.

• To verify if option 66 is telling the phone to get a config from somewhere else log into the phone GUI

• Navigate to Status and look for the section called Config Provision URL which will show you what IP or FQDN the phone is using to receive its configuration file from.

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Long Way

• If you setup a phone to pull a config from your PBX and its never hitting the PBX for a config file most likely you have option 66 enabled on your network which overrides what the phone has for a config server.

• To verify if option 66 is telling the phone to get a config from somewhere else log into the phone GUI

• Navigate to Management > Configuration

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• Press the Download button under the Download System Log

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• Open up the syslog and look for line called 

  • RTOS_Upgrade: DHCP Option, server path:

• This example will show a phone receiving option 66 to 192.168.0.2

[08-12 14:15:05 50:15:c8] RTOS_Upgrade: DHCP Option, server path: 192.168.0.2
[08-12 14:15:05 50:15:c8] RTOS_Upgrade: Will Parse Config Server Path 192.168.0.2
[08-12 14:15:05 50:15:c8] ParseSerPathStr: file is 192.168.0.2
[08-12 14:15:05 50:15:c8] ParseSerPathStr:====== addr is 192.168.0.2
[08-12 14:15:05 50:15:c8] ParseSerPathStr: ip is 192.168.0.2, 0xc0a80002