Quick question about acknowledging reserve assignments. On your last day off before a block of reserve, advice was given not to answer the phone as that allows for "two way communication" and that you can be assigned a SC or FS earlier than 10:00.

So when they call up at 13:00 on your last day off with a 16:00 SC and you can see a lot of earlier SCs and FSs in open time AND THEY SAY ON YOUR PHONE MESSAGE to "please call the crew desk with acknowledgement", are they baiting you into "making two way communication" so they can switch it to an earlier (before 10:00) SC or FS?

Am I paranoid?

Can they change it to something else?

Can I "acknowledge" it online instead of calling?

When do I have to acknowledge it by?