User's Manual

ADCP-75-158 • Issue 1 • July 2003 • Section 1: Overview

Page 1-5

Figure 1-4. Local Service Interface

2.5 Remote NOC Interface

Remote communications between a Network Operations Center (NOC) and a networked

grouping of multiple Digivance systems is supported by a remote NOC interface capability as

shown in Figure 1-5. The primary component of the remote NOC interface is a PC-type desktop

computer loaded with the Digivance Element Management System (EMS) software. EMS

provides the various control and monitoring functions required for remote management of

multiple Digivance systems through a NOC.

A Controller Area Network (CAN) port is provided on each HU so that up to twenty-four HU’s

can be networked together in daisy-chain fashion and controlled though the same EMS

computer. The EMS computer connects to the networked HU’s through the computer’s RS-232

port #1. All HU’s can then be controlled through the same EMS computer.

The NOC is connected to the EMS computer through a T1 system or other medium. The EMS

computer’s RS-232 port #2 interfaces with the T1 system equipment. The T1 equipment must

be capable of interfacing with an RS-232 ASCII interface port.

At the NOC, control and monitoring of the networked Digivance systems are effected through a

Network Element Manager (NEM) interface which requires only a VT100 terminal/emulator

for operation. The NEM interface language consists of simple ASCII text strings. All

communications are input as either SET or GET commands which result in ASCII text string

responses from the specified system or systems. The EMS desktop computer may also be used

locally to manage the networked Digivance systems. Local operation is through the EMS

software GUI.

HOST UNIT

LAPTOP WITH EMS

(LOCAL INTERFACE)

LAPTOP WITH EMS

(LOCAL INTERFACE)

18524-A

CD-ROM WITH DIGIVANCE

ELEMENT MANAGEMENT

SYSTEM (EMS) SOFTWARE

REMOTE

UNIT

RS-232