How to use PSM on BG96_Mini_PCIe

I entered AT+CPSMS=1,“00000100”,“00001111”, but ERROR is returned. Please tell me what to do.

such as

AT+CPSMS=1,,,"00111000","00000001"
AT+QPSMS?

Thank you.
It seems that I used a full-width double mark.
And the response of AT+QPSMS? was +QPSMS: 1,“86400”,“2”.
What does this mean?

T3412=86400s,T3324=2s