Physical Descriptions
NetVanta 3000 Series Hardware Installation Guide
20
Copyright © 2010 ADTRAN, Inc.
61200860L1-34AA
Figure 4. NetVanta 3120 (without DBU) Rear Panel Layout
NetVanta 3120 Rear Panel Interfaces
10/100Base-T Ethernet Interface
The Ethernet port (
ETH 0/1
) is an RJ-45 connector. See
Table A-1 on page 101
for the Ethernet port
pinouts. The Ethernet port provides the following:
•
10Base-T or 100Base-T with a single connector
•
Auto-negotiation
•
CSMA/CD
•
IEEE 802.3 compatibility
DBU Interface (1700600L2 only)
The NetVanta 3120 has a
DBU
port on the rear panel to provide analog, V.90 dial backup.
Factory Default Switch
The NetVanta 3120 has a factory default switch (labeled in
Figure 3
) on the rear of the unit. If the
factory default switch is pressed during bootup, the unit will stay in bootstrap mode. Since the unit has
no serial port, Telnet has been built into the boot code. The default IP address is 10.10.10.1.
If the factory default switch is pressed and held for 5 seconds after boot, the switch ports on the
NetVanta 3120 will default to 10.10.10.1 and all access policies will be removed from those interfaces.
If the factory default switch is pressed for 30 seconds, a default configuration will overwrite your
existing configuration and reboot the unit.
4 Switch Port Interfaces
Ports 1 through 4 are RJ-45 connectors used to access the 10/100Base-T Ethernet switch.
Power Connection
The rear panel has a
12V
input for the DC power supply included in the shipment. Please refer to
Supplying Power to the Unit on page 83
for connection details.
The default switch must be pressed WHILE the
STAT
light is flashing green. Do not
press the default switch BEFORE the
STAT
light is flashing green, as this will cause
boot to be missed.
1
2
3
4
ETH 0/1
1
0
Default
Switch
