2400 BPS Internal Modem (250-1037D) Settings Faxback Doc. # 5025 The switch on the back of your modem sets your modem to operate on either Com1 or Com2. If you do not have another serial device, such as a serial mouse or printer, set the modem to Com1. Otherwise, set the modem to be different than the other serial device. │ │ │ │ │ COM 2 │ │ COM 2 │ │ ┌───┐ │ │ ┌───┐ │ │ │ │ │ │ │XXX│ │ │ ├───┤ │ │ │XXX│ │ │ │XXX│ │ │ ├───┤ │ │ │XXX│ │ │ │ │ │ │ └───┘ │ │ └───┘ │ │ COM 1 └┐ │ COM 1 └┐ └─┐ ┌┘ └─┐ ┌┘ └─────┘ └─────┘ Com Port Settings There is also a jumper on the board that will allow the modem to be configured as Com3 or Com4. The jumper is labeled as shown below: ┌────────┐ │ o o │ o └────────┘ Com1/Com2 Com3/Com4 (Default) Changing the jumper will change the function of the switch. Thus, if the jumper is: ┌────────┐ o │ o o │ └────────┘ Com1/Com2 Com3/Com4 The switch settings become: │ │ │ │ │ COM 4 │ │ COM 4 │ │ ┌───┐ │ │ ┌───┐ │ │ │ │ │ │ │XXX│ │ │ ├───┤ │ │ │XXX│ │ │ │XXX│ │ │ ├───┤ │ │ │XXX│ │ │ │ │ │ │ └───┘ │ │ └───┘ │ │ COM 3 └┐ │ COM 3 └┐ └─┐ ┌┘ └─┐ ┌┘ └─────┘ └─────┘ Com Port Settings (smm 07/28/93)