Chapter 2. Installation
61200305L1-1 ATLAS 550 User Manual 2-5
Control/Chain Out Port
The Control/Chain Out port (RJ-48C) connects to another ATLAS550 Chain
In connector. The Control/Chain Out port output provides the following:
• EIA-232 output to chain control to other ADTRAN equipment, such as
a TSU 120.
• 2400, 9600, 19200, or 38400 bps operation
• Automatic setup; no user input required
The Control/Chain Out connection follows, and Table 2-2 shows the pinout.
Ethernet Connection
The Ethernet port (RJ-48C) provides a 10/100BaseT Ethernet LAN connec-
tion, which is used for TFTP, SNMP, and Telnet connection. The network
connection follows, and Table 2-3 shows the pinout.
Connector type RJ-48C
Part number AMP# 555164-2
Table 2-2. Control/Chain Out Pinout
PIN NAME DESCRIPTION
1 GND Ground - connected to unit chassis. Connects to GND
of next unit.
2UNUSED—
3 TX DATA Data transmitted to chained units by the ATLAS 550.
Connects to RX DATA of the next unit.
4UNUSED—
5 RX DATA Data received from chained units by the ATLAS 550.
Connects to TX DATA of the next unit.
6,7,8 UNUSED —
Connector type (USOC) RJ-48C
Part number AMP# 555164-2
Table 2-3. 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 —
