User's Manual

Table Of Contents

DRAFT 4

32 General Safety and Regulatory Information TB9400 Installation and Operation Manual

2.2.4 Anti-tampering Devices

All network elements should be physically secured, where possible. This

includes the use of locked cabinets and the use of seals on connectors.

All network and audio connectors should be sealed with the stick-on type

of seal. The purpose of the seals is to detect unauthorized tampering. The

seal should reveal if any of the connectors have been unplugged or if any

unauthorized equipment has been plugged in.

The seals must be difficult to remove without breaking, and must bridge

between the cable and equipment side (plug and socket) of the connection.

Seals must cover any unused network or audio sockets. This includes the

Ethernet connector on the rear panel, any spare switch ports, and the

console port on the router and switch.

The seals must be difficult to reproduce. A sticker initialed or signed by the

technician should satisfy this.

Seals must be replaced if they need to be disturbed during maintenance.

2.3 Environmental Conditions

2.3.1 Operating Temperature Range

The operating temperature range of the equipment is – 22°F to + 140°F

(– 30°C to + 60°C) ambient temperature. Ambient temperature is defined as

the temperature of the air at the intake to the cooling fans.

2.3.2 Humidity

The humidity should not exceed 95% relative humidity through the

specified operating temperature range.

2.3.3 Dust and Dirt

For uncontrolled environments, the level of airborne particulates must not

exceed 100 µg/m