NetVanta 3000 Series Hardware Installation Guide OVERVIEW
61200860L1-34L Copyright © 2006 ADTRAN, Inc. 19
NetVanta 3120 Rear Panel Design
The NetVanta 3120 rear panel is shown below. Appendix A, on page 75, provides pinouts.
Figure 2. NetVanta 3120 Rear Panel Layout
NetVanta 3120 Rear Panel Interfaces
10/100BaseT Ethernet Interface
The Ethernet port (ETH 0/1) is an RJ-45 connector. See Table A-1 on page 75 for the Ethernet port
pinouts. The Ethernet port provides the following:
• 10BaseT or 100BaseT with a single connector
• Auto-negotiation
•CSMA/CD
• IEEE 802.3 compatibility
DBU Interface
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 2) 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 10/100BaseT 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 66 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
DBU
23 4ETH 0/1
10
Default
Switch
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