I know that ATA 186 is not supported for analog modems but I know that a modem does work if connected to an ATA. If you have a modem and are satisfied with communications, please let me know what parameters you have set on the modem end... or the ATA end if other than default settings.
We are currently dialing into the traditional PBX through a modem and it works but there are some pauses during connectivity. It does not work as well compared to connecting the modem directly to a POTS line.
Thanks in advance,