Chapter 4

Front Panel Operation

The liquid-crystal display (LCD) front panel provides easy real-time access to modem configuration and status. You can use the LCD at any time to modify modem options or to get information about modem operation and status. All of the major modem options can be controlled through the LCD interface without an external terminal or phone line connection. Operation of the LCD can be secured using a password protection feature. A remote modem can even be configured using the local LCD, through the use of the front panel remote configuration feature.

LED Descriptions

The Modem 3600 LED indicator functions are as follows:

TR (Terminal Ready). TR lights when the DTE asserts Data Terminal Ready. This signal is input on pin 20 (CCITT V.24/108.2).

CS (Clear to Send). CS lights when the modem is ready to send data to the DTE. This signal is output on pin 5 (CCITT V.24/106).

RS (Request to Send). RS lights when the DTE is ready to send data to the modem. This signal is input on pin 4 (CCITT V.24/105).

CD (Carrier Detect). CD lights when the received audio carrier signal is detected or, if enabled, when error control protocol negotiation is complete. This signal is output on pin 8 (CCITT V.24/109).

RD (Received Data). RD lights for a data space condition at the receive data output, indicating receive data output activity. This signal is output on pin 3 (CCITT V.24/104).

TD (Transmit Data) TD lights for a data space condition at the transmit data input, indicating transmit data input activity. This signal is input on pin 2 (CCITT V.24/103).

Modem 3600

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Black Box 3600 MODEM manual Chapter Front Panel Operation, LED Descriptions