We have a fax machine connected to an FXS port in a 2851 (CME 4.1). Running tests on the machine reveal that the transmission volume is set too high, causing distortion on faxes and an inability to fax to some destinations.
Is there a way to turn the transmission volume down at the port-level? Apparently it cannot be done on the fax machine (? this sounds odd to me...but the technician for the machine is adament)