Specifications

16 Chapter 2
Before You Start
Meeting System Requirements
Before you begin to install the XMU+ unit, you need to ensure that XMU+ system
requirements are met. These requirements include:
 Environmental Requirements on page 16.
 Power Requirements on page 17.
 PBX Requirements on page 17.
Environmental Requirements
For optimum operation of the XMU+ unit, ensure that the XMU+ is placed in an
environment that meets the following requirements:
 Rack, wall, or shelf space is available for proper mounting.
If mounting on a rack, it must be 19”. A 23” rack can be used if a 23” rack mounting
bracket is ordered with the XMU+ unit. Record the rack size and mounting method in
The XMU+ Delivery Checklist on page 21.
 The XMU+ is designed to operate within a 0 - 40 degrees
o
C (32 - 104
o
F) temperature
range. Adequate cooling or heating must be provided to guarantee this range.
 HVAC requirements must also be met:
The large chassis XMU+ produces a maximum of 750 BTU/hour of waste heat, while
the small chassis XMU+ produces a maximum of 160 BTU/hour of waste heat.
Note: The actual amount of waste heat generated by the XMU+ depends on the number and
type of line cards and Power Supply cards installed.
See Chapter 11: XMU+ Technical Specifications and Approvals for more detailed thermal
information.
HVAC
Heating, Venting,
and Air Conditioning.