[Observium] ADSL Sync Speed change alert

Hi

I am trying to set the Alert checker to notify me on any sync speed changes on the adsl port. Currently I can see all the changes on the Event log as below:

1d 19h 58m adsl Interface changed: [ifSpeed] 5152000 -> 5184000 4d 12h 48m adsl Interface changed: [ifSpeed] 5120000 -> 5152000 6d 4h 23m adsl Interface changed: [ifSpeed] 5344000 -> 5120000

How to set the check conditions to alert on any change in Sync speed such as "ifSpeed ne old_speed"

Checker Type:Port Check Conditions: ifSpeed ??

Associations Device match: hostname equals *hostname* Entity match: ifType equals adsl

Any help is much appreciated. Regards

---- Tomasz Halapacz