User Manual

ADCP-XX-XXX • November 2000 • Section 4: WMTS Installation
Page 4-2
 2000, ADC Telecommunications, Inc.
1 INTRODUCTION
The purpose of this document is to describe the specific procedures to install ADC’s Wireless
Modem Termination System (WMTS). The WMTS utilizes the MDS/MMDS frequency
spectrum to obtain two-way communication. The WMTS manages predefined frequencies
through its upstream and downstream cards on the back of the unit. On the front, a universal
controller card manages its associated upstream and downstream backplane cards, plus a
standalone card manages the data to the network. In addition, a microprocessor card manages
the operation of the unit and two redundant power supplies provide the power to the chassis.
2 INSTALLATION
2.1 Installing the WMTS
1. Prepare a 19 in. by 8U (one U equals 1.75 in.) rack (at the minimum) to leave 2U at the
top and 2U at the bottom for ventilation to avoid overheating, as illustrated in Figure 4-1.
If placing one rack on top of the other, leave 2U between the two racks for ventilation
and thermal protection. Note that the air intake is from the bottom with exhaust at the
top. Included with each WMTS are two air baffles of 2U each. These are to be installed
above and below each WMTS.
2. Mount the airflow shelf bracket on top of the rack to direct the heat to the edge at the
right side of the chassis, using four screws to fasten the shelf bracket to the rack.
3. Move the WMTS into the rack by using the handles at both sides. Fasten the WMTS
front panel to the rack with four screws inserted through the mounting holes (Figure 4-1).
Be sure to leave at least 2U at the top and bottom to allow airflow.
4. Verify that the rear upstream and downstream cards and the front universal and power
cards are completely inserted and the latches are screwed in.