ZyXEL Communications RS-1612 manual DTE RS-232 Ports, Terminal Blocks, Pin Assignment Purpose

Figure 2-2 RS-1612 Rear Panel

DTE RS-232 Ports

The RS-1612 rack has sixteen DTE RS-232 ports. Each port corresponds to a modem card slot on the front. Connecting an RS- 232 cable between a modem port and a computer serial port allows two-way data transfer between the modem and the computer.

Terminal Blocks

Each terminal block has eight terminal pins (four for RE models) for connecting phone lines to the corresponding modem on the RS- 1612 rack. The eight pins of a terminal block are defined in the table below:

Pin	Assignment	Purpose
1	TELE SET TIP	Connects to your telephone.
2	TELE SET RING	Connects to your telephone.
3	TIP	Connects to dial up line or U-336RE
		leased line.
4	RING	Connects to dial up line or U-336RE
		leased line.
5	RX	For use on four-wire leased line
		systems receiving line (R model only).

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