User's Manual
Table Of Contents
- 1.0 INTRODUCTION
- 2.0 MODEL NUMBER CODES
- 3.0 HARDWARE INSTALLATION AND BASIC INTERFACE REQUIREMENTS
- 4.0 INITIAL STARTUP AND CONFIGURATION
- 4.1 Introduction
- 4.2 STEP 1—Power up the LEDR Radios
- 4.3 STEP 2—Establish Communications with the Radio
- 4.4 STEP 3—Make Initial Login to Radio
- 4.5 STEP 4—Change the SUPER Password
- 4.6 STEP 5—Review Essential Operating Parameters
- 4.7 STEP 6—Set TCP/IP Settings to Enable SNMP and/or Telnet Management (if required)
- 4.8 STEP 7—Set User Configurable Fields
- 4.9 STEP 8—Verify Radio Performance
- 4.10 STEP 9—Install the Link
- 4.11 STEP 10—Verify the Link Performance
- 5.0 CONFIGURATION AND CONTROL VIA THE FRONT PANEL
- 6.0 CONFIGURATIONAND CONTROL VIA THE CONSOLE PORT
- 7.0 STANDARDIZING RADIO CONFIGURATIONS
- 8.0 UPGRADING LEDR FIRMWARE
- 9.0 USING ORDERWIRE
- 10.0 USING THE SERVICE CHANNEL
- 11.0 PROTECTED CONFIGURATION
- 12.0 SPACE DIVERSITY OPERATION
- 13.0 SPARE PARTS, UNITS AND ACCESSORIES
- 14.0 Fractional-T1 INTERFACE CARD 03-3846A01 Fractional-E1 INTERFACE CARD 03-3846A02
- 15.0 INCREASE BANDWIDTH BY CHANGING TRANSMITTER AND RECEIVER FILTERS
- 16.0 BENCH TESTING OF RADIOS
- 17.0 TECHNICAL REFERENCE
- 17.1 Specifications— Models: LEDR 400S, 700S, 900S and1400S
- 17.2 Specifications— Models: LEDR 400F, 900F, 1400F
- 17.3 Specifications— Protected Switch Chassis
- 17.4 Optional Equipment (Consult factory for detailed information)
- 17.5 Accessories
- 17.6 I/O Connector Pinout Information
- 17.7 Watts-dBm-Volts Conversion
- 18.0 RADIO EVENT CODES
- 19.0 IN CASE OF DIFFICULTY
MDS 05-3627A01, Rev. D LEDR Series I/O Guide 103
11.0 PROTECTED CONFIGURATION
11.1 Introduction
The LEDR radio can be supplied in a protected (also called redundant
or “1+1”) configuration (Figure 21). The protected version is designed
to perform automatic switchover to a second radio in the event of a
failure in the primary unit.
Protected operation is important for many mission-critical or revenue
producing links. By configuring two identical LEDR radios in parallel
and including a third switch box containing the RF switching circuits
and the customer interfaces, it is possible to protect against failure in any
of the LEDR radio sub-systems. Failures can be either malfunction or
external environmental effects, such as multipath fading or nearby light-
ning strikes.
A Protected station consists of two standard LEDR Series radios and a
Protected Switch Chassis (Figure 21). Ordinarily, the three chassis are
mounted together in a “stacked” arrangement, one above the other, with
one rack unit of space in between.
The top unit is referred to as the system’s “Unit A”, and the lower one
as “Unit B”. Each unit is considered to be the “sibling” of the other. The
sibling of Unit A is Unit B, and the sibling of Unit B is Unit A. This dis-
tinction is used in the
rdnt command found on Page 74 under the sub-
heading “Read & Write Commands.”
Invisible place holder
Figure 21. Protected Switch Chassis (PSC)