AT&T 2400 manual When PB lead is terminal is busy

Hardware Installation

Table 4-3. MCI I/O Port DIP-Switch SW02 or SW12 Settings for Switches 1 through 8

Switch	Setting	Function
Number
1	ON	When PB lead is - terminal is busy
	OFF	When PB lead is + terminal is busy
2	ON	DTR signal is always ON
	OFF	DTR signal is controlled by the CPU
3	ON	DSR signal is not provided
	OFF	DSR signal is provided
4	ON	CD is not provided
	OFF	CD is provided
5	ON	CS is not provided
	OFF	CS is provided
6	ON	CI is not provided
	OFF	CI is provided
7	ON	PB signal is not provided
	OFF	PB signal is provided
8	OFF	Not used

NOTE:

Recommended Default Settings:

■If you use port 0, configure switches 01 and 02. If you use port 1, configure switches 11 and 12.

■Standard switch settings for SW01 or SW11 are 1 ON, 2 OFF, 3 ON, 4 OFF, 5 OFF, 6 OFF, 7 ON, and 8 ON.

■Standard switch settings for SW02 or SW12 are 1 ON, 2 ON, 3 ON, 4 ON, 5 ON, 6 ON, 7 ON, and 8 OFF.

3.Connect one end of a 25-pair cable to the MCI I/O port on the switch. To create the cable, refer to Table 4-4for the correct cable pinouts.

4-6Issue 2 December 1995