deciphering some new haven PD codes

Hi, I am pretty new so thanks in advance for your patience.



I am trying to decipher some code talk from some recent New Haven PD dispatch.



NHPD officers were dispatched to a home. Among the info conveyed by the dispatcher was something that sounded like "code 3 looks like signaling at that location."



This was after the dispatcher gave the officer the address (of a poss. burglary in progress) and before describing the basic narrative, ie Caller said man entered building ... etc.



Police then headed for the location.



I know code 3 in new haven means supervisor requested (although I don't knowi if that means the officer is requesting a supervisor or a city resident is requesting a supervisor)



I also know code 3 is used by a lot of places to mean lights and sirens (though not newhaven?)



Anyway, not sure either of those fit this and was wondering if anyone knows what they could mean by saying that 'a code 3 is signaling at that location.'



Thanks a lot