Chapter 3 Installing the TimeProvider
Getting Started
48 TimeProvider User’s Guide 097-58001-02 Revision C – August 2005
Getting Started
Before beginning the installation, complete the pre-installation check described in
Pre-Installation Check, on page 48, perform the site survey in Performing a Site
Survey, on page 48, and gather the necessary tools and materials described in
Gathering the Tools, on page 49.
This section describes the preliminary activities you need to perform before you
install the TimeProvider
Pre-Installation Check
Before installation, ensure that the following preparations are in place:
îš„ Grounded equipment rack
 A fused power panel is present (–48 V DC at 5 Amp)
Performing a Site Survey
Physical Space
The TimeProvider is designed to mount in a 19-inch (48 cm) rack. Rack ears are
available to mount the shelf in a 23-inch (58 cm) rack. The ETSI front-
access shelf is
6.875 inches tall (177 mm), or 4 RU (Rack Units, where 1 RU = 1.75
in/
44.45 mm). For
ventilation, plan on leaving a 1 RU space below the shelf. The
NEBS rear-access
shelf is 5.25 inches tall (133 mm), or 3 RU. For ventilation, plan for a 1 RU space
above and below the shelf.
The Expansion Panel also mounts in a 19-inch (48 cm) rack, and it is 3.5 inches
(89 mm, or 2 RU) tall. The Expansion Panel does not require ventilation spaces
above or below it.
You can mount the shelf so that it protrudes 2 inches (5 cm) or 5 inches (12.7 cm)
from the front of the rack, or you can mount it flush with the front of the rack.
Environmental Requirements
To prevent the unit from interfering with other equipment, install and operate the unit
according to the following guidelines:
Caution: All telecom signal wiring (including I/O, clocks and
Ethernet) must be installed with shielded cabling only and
appropriately grounded.
Cabling shall be installed in compliance with intra-building surge,
lightning, and EMC requirements.
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