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September 1999 P/N 880-503284-001-A1 - page 13 / 65

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Overview

Port Usage

Table 1-3 lists the connectors on both front and rear modules with details about their uses:

Table 1-3 Port

NCC 2020 Connector Ports Located

Usage

Network Eqpt

Rear Rear

Management Port In

Rear

Management Extension

Rear

Ext Timing

Rear

Alarm Relay

Rear

Connect an external alarm system which will trigger on either a relay closure (using NO and COM leads) or an open (using NC and COM leads). The relay in the NCC module supports Form C relay specifications.

Connect ASCII terminal for configuration, diagnostics, alarm monitoring, and/or performance monitoring.

Monitor network signals, DSX-1 equipment signals, connect T1 test equipment. These ports do not reflect line signals unless the module is in CSU mode. Use only when in CSU mode (DIU bus = none).

Connect the T1 line to this port.

Connect customer equipment which presents a DSX-1 T1 framed signal — often a PBX. This port is only used if the module is in CSU mode or Drop and Insert mode.

Connect a cable directly or a modem for dialup connection to a PC running either of the Verilink management programs — AM2000 or Node Manager.

Connect a cable to an additional node at the same location. This feature is only supported when AM2000 is used for node management.

Connect an optional external clock source, using either a TTL (Transistor Transistor Logic) level (0 to +5V) or balanced (RS-422) signal. The clock must be at 1.544 Mbit/s.

Craft

Front

Bantam Jacks

Front

Verilink NCC 2020 User Manual

1-5

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