Verilink NCM 2000 (880-502623-001) Product Manual - Manual (Page 16)

NCM Overview
1-6 Verilink NCM 2000
Front Panel LEDs The NCM front panel provides six tri-color status LEDs:
Table 1-1 NCM 2000 Front Panel LEDs
Management Ports The NCM 2000 has three front panel management ports.
Table 1-2 NCM 2000 Front Panel Connectors
NOTE: For operator convenience, the PRI and EXT ports are redundant with
the same connectors on the connector interface module (NIM 2000),
which is accessible at the rear of the shelf.
NIM 2000
Network
Interface Module
The NIM 2000 (Network Interface Module 2000) is mounted on the
rear of the shelf, behind the NCM. The NIM 2000 ports are listed in
Table 1-3 below:
LED Name States
TX Transmit Flashes green whenever this NCM transmits a packet to
the Ethernet.
RX Receive
Flashes green whenever this NCM receives a packet from
the Ethernet.
COL Collision Flashes amber whenever there is an Ethernet collision.
ACT Active
Steady green if the NCM is the active NCM, flashing
green to off if the NCM is the standby NCM.
ALM Alarm
Steady red if there is a Major or Critical alarm on any of
the modules in the node. Glows steady amber if a power
supply is missing. Green means no alarm. It is off on a
standby NCM.
SYS System
Steady green, indicating the module is powered up
normally, having passed the power-up self-test.
Port Connector Interface Use
L OCAL RJ-11 RS-232 ASCII terminal operations
PRI RJ-45 RS-232
ACP bus connection to Node
Manager, or SLIP port if SLIP is being
used
EXT RJ-45 RS-232 Daisy-chain to next ACP shelf