You may not have to answer, but there are situations you are required to acknowledge an assignment made prior to 1800 on LDO. Sometimes the company shall advise a pilot which is done with a voice mail, sometimes not, they can just place it in your schedule. If the assignment was made prior to 1800, then you must establish two way contact or they will call at 0001.

I recommend all RSV experts on this forum sit down and read 20-K and 20-I-6 of the contract a few times. Then read it a few more times.

You get a CDW at 1800 on LDO for a reason. It is duty and starts 30/168 clock running or interrupts a time free from duty. If you have an assignment placed prior to 1800 you have to acknowledge which then satisfies the two way contact requirements.

And for SC or FSB, there is no automated check in available.

Lee