ADTRAN 1200305L1 system manual Ethernet Connection, Alarm Relay Connection, Connector type Usoc

ATLAS 550 System Manual			Section 2, Engineering Guidelines
		Table 5. CONTROL OUT Pinout (Continued)
PIN	NAME		DESCRIPTION
3	TX DATA		Data transmitted to chained units by the ATLAS 550. Connects to RX
			DATA of the next unit.
4	UNUSED		—
5	RX DATA		Data received from chained units by the ATLAS 550. Connects to TX
			DATA of the next unit.
6,7,8	UNUSED		—

Ethernet Connection

The Ethernet port (RJ-48C) provides a 10/100BaseT Ethernet LAN connection, which is used for IP routing, TFTP, SNMP, and telnet connections. The network connection follows, and Table 6 shows the pinout.

Connector type (USOC)		RJ-48C
			Table 6. Ethernet Pinout
PIN	NAME		DESCRIPTION
1	TX1		Transmit Positive
2	TX2		Transmit Negative
3	RX1		Receive Positive
4, 5	UNUSED		—
6	RX2		Receive Negative
7, 8	UNUSED		—

Alarm Relay Connection

This connection alerts the user when a selected alarm condition exists. The 4-pin, removable terminal block connects with external wiring. Refer to DLP-014,Connecting the Alarm Contacts for detailed instructions. Clear the alarm condition by pressing the Alarm Cut-Off (ACO) switch located on the front panel of the ATLAS 550.

Table 7 shows the pinout for the Alarm Relay connector.

Table 7. Alarm Relay Connector Pinout

Pin	Name	Description
1	Normally Closed (NC)	Opens when a selected alarm condition is present.
2	Normally Open (NO)	Closes when a selected alarm condition is present.
3	Common (COM)	Common connection between external circuitry and NC or NO
		terminal.
4	Chassis Ground (GND)

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