Is the following description correct? ONT call emulation refers to the use of the ONT test module to replace the user's phone for call test. When ONT POTS users cannot provide voice services…

Is the following description correct? ONT call emulation refers to the use of the ONT test module to replace the user's phone for call test. When ONT POTS users cannot provide voice services, remotely execute an ONT call simulation test through the OLT command line to help users diagnose whether the ONT's POTS user calls are normal. ONT can be offline during ONT call simulation