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INSTALLATION REQUIREMENTS/ SPECIFICATIONS
2-4
FRONT PANEL SWITCHES (cont.)
ROOT | / O When the switch is on ( | ), it designates the
bridge as the root bridge in the network.
AUI PORT (NB20E/NB25E)
Interface Connector
Type: 15 position D type receptacle.
Pin 1 Logic Ref. Pin 9 Collision -
2 Collision + 10 Transmit -
3 Transmit + 11 Logic Ref.
4 Logic Ref. 12 Receive -
5 Receive + 13 Power (+12 Vdc)
6 Power return 14 Logic Ref.
7 No Connection 15 No Connection
8 Logic Ref
Connector Shell: Protective Ground
RS232 PORT
Type: Standard 9 pin RS232 Port
Pin 1 DCD Pin 6 NU
2 TX 7 TRS
3 RX 8 CTS
4 DTR 9 RX Clock
5 Signal Ground