what is an "external alert"

[RWDM3]

my BI has been working good
one false alert in like 3 weeks
recently i have been getting alerts that say "external"
and when i check the clip nothing is there
i know i can make this happen if i am watching the camera and press the lightning bolt.. but im not pressing anythingn

 

[wittaj]

BI is pulling for motion whether it is MD, SMD, or IVS and audio triggers if you have it. It is just called external.

From the help file:

Motion/Alarm trigger signals received from ONVIF GetEvents PullPointSubscription will be
classified as either having an ONVIF source or an EXTERNAL source depending on whether
these events are unary or binary and you select the Trigger until reset option. Events with
“begin” and “end” (binary) components will be classified as ONVIF triggers. Single events
(unary) will be classified as EXTERNAL triggers.

What I seemed to notice, and was probably just coincidental was sometime around the time that ONVIF "suspended" Dahua and Hikvision, the ONVIF triggers changed to External Triggers in BI.