Nortel Networks 1000M User Manual

Page 43

Main components of the Chassis system

Cooling

The NTDK91 chassis and the NTDK92 chassis expander have forced air
cooling. As a result, you can install the chassis in a horizontal or vertical
position. The fan inside the chassis is controlled by heat. It runs at a
reduced speed at room temperature.

WARNING

Do not block chassis ventilation. Poor ventilation could cause the
system to overheat and damage system components, which may
result in service interruption.

Signaling Server (for CS 1000M systems)

The Signaling Server is an industry-standard, PC-based server. It provides
a central processor to drive the signaling for IP Phones and IP Peer
Networking.

The Signaling Server can be installed in a load-sharing redundant
configuration for higher scalability and reliability.

For information about installing and configuring the Signaling Server, refer
to Signaling Server Installation and Commissioning (NN43001-312).

Power supply

The universal power supply in the Chassis system uses AC input. The
power supply is factory installed and not customer replaceable. The Chassis
system does not support DC input.

Power switch

There is a power switch on the front of the NTDK91 chassis and the
NTDK92 chassis expander. Use this switch to turn the system power on and
off. See

Figure 19 "Front of chassis" (page 45)

Power status indicator

There is a power status indicator (LED) on the front cover (top left-hand
corner) of the chassis and the chassis expander. When the LED is green,
the power is in operation. When the LED is off, there is a power failure of
one of the power outputs. See

Figure 19 "Front of chassis" (page 45)

Power supply DIP switch settings

Use a DIP switch to set ringing voltages, ringing frequencies, and message
waiting voltages. See

Table 7 "Asia Pacific/CALA power supply DIP switch

settings" (page 44)

and

Figure 19 "Front of chassis" (page 45)

for all DIP

switch setting options. Typical settings are shown for the following regions:

•

Table 7 "Asia Pacific/CALA power supply DIP switch settings" (page 44)

Nortel Communication Server 1000