This feature is usually accessible via the phone's menus. Consult the user s manual for your fax software for more specific instructions. The modem is not set to use Hardware Flow Control. Turn on Hardware Flow Control for the wireless modem. The other modem has hung up.
Various factors can result in a terminated call.
Try to place the call again. Also check for loose connections between the Sprint PCS Phone and the computer. You were automatically disconnected due to inactivity. Some software will terminate a call after some period of inactivity. Check your software for controls on automatic disconnect.