We have a fax machine connected to an FXS port. Many times the fax machine port does not go down (Hang Up) after receiving or sending a fax. Therefore, users when they try to use the fax machine they don't a dial tone on the fax machine.
If we leave it for sometime like 15 minutes the port seems to hangup and users are able to use the fax machine again.
THis is an intermittent problem where sometimes the fax machine runs for a week without any problem.
Any ideas are highly appreicated,