
Planning for Installation
Plexus 9000 Planning and Engineering Guide
Issue 5, January 24, 2003
Section 130-200-000
6-10 Telica,
Inc.
DS-1 and DS-3/STS-1 cross connects are required as demarcation points
and connections to other equipment. The number of cross-connects
needed is dependent upon the size (number of DS-1s and DS-3/STS-1s
supported) and the number being connected to the Plexus 9000.
A 10/100Base-T Ethernet hub may be required for connecting the
Plexus 9000’s OS Ethernet connector to a network for monitoring the
equipment. Telica recommends a DC-powered rack-mounted hub, which
requires -48 Vdc, fused at 2-amps. This LAN could be a corporate
network or a dedicated network of equipment surveillance and control.
Access to the OS Ethernet connection also allows access to the
Plexus 9000 using a Telnet session or Element Management System
(EMS) to configure and monitor the unit.
Modems may be required to provide remote access to the equipment using
the craft ports of the Plexus 9000 for monitoring and retrieval of alarms
and status.
A VT100 terminal or a PC with a terminal emulation program is required
to initially provision the Plexus 9000 using the craft port. There are no
Ethernet address defaults and these must be set through the craft port
connection.
6.1.6 Grounding
Requirements
The Plexus 9000 is suitable for installation in either the integrated ground
plane or isolated ground plane system in a central office environment.
Only a single connection to the central office ground plane is required.
The Plexus 9000 power return is isolated from the chassis ground. The
frame/chassis ground path is a non-current carrying path under normal (no
fault) conditions. Telica can provide ground wire with lugs as necessary.
6.1.6.1
Frame/Chassis Ground for the Plexus 9000
The frame/chassis ground path provides a low impedance connection for
all metal parts of the Plexus 9000. The frame/chassis ground connection
within each Plexus 9000 should be terminated to the main ground bar.
Each Plexus 9000 chassis is connected to the earth/frame ground via a
6 AWG wire, with a double-hole lug at the chassis end. Non-oxidizing
grease should be put on the ground lugs to ensure a good connection.