CRM/communication

[flapsforty]

L&G, you're asking for procedures, so here's ours.
The PF is flying the A/C. The PNF does the RT and the PA.

I don't think I have ever needed to interrupt a cockpit PA, so can't tell you what the reaction would be.
I can understand why you called, but I can also understand why the pilots perhaps, right then, decided not to answer you immediately.
Commuting to work, I spend way to much time on the cockpit jumpseat, and as soon as even mild turbulence starts, the pilots get mentally & physically 'busy'. You can see it, and feel it in the cockpit atmosphere. From relaxed chatty mode they go to concentrated pilot mode. Often a hand sneaks closer to the control column even if the A/C is on AP, they start listening harder to ATC and start wondering what's up.
If one of them is already making a PA and therefore a bit out of the loop, the other then gets a 'double load'. Perhaps not an opportune time to answer a call from the cabin?
Any pilot, please correct all of the above if it's BS!

We have a special emergency thingy on the cabin interphone which we can use to alert the pilots about something that needs attention NOW, for occurences that can not wait......

The phrase "How dare you interrupt me when i am talking to the passengers" seems rather brusque and no susprise you were taken aback by that. Did the 2 of you have time to discuss this event later, and if so, what was said?