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 49
ais Alarm Indication Signal
Usage:
ais [linelist] [-g <on|off>] [-f <on|off>]
This command enables or disables alarm signal generation [-g] and for-
warding [
-f] on specified E1/T1 interface lines. When generation is
enabled, fault conditions within the link or at the line interface will cause
the appropriate AIS/RAI signaling to occur. When forwarding is
enabled, AIS/RAI signaling at the line interfaces will be detected and
passed to the other end of the link.
Command Example:
ais -f on -g on
Returns:
AIS on RAI on
NOTE: For protected configurations and full-rate radios, disable the
alarm generation through the use of the ais -g off command.
Background on AIS command:
In fractional operation, the radio extracts the required timeslots and data
at the input to a link, and reconstructs the full frame at the output end.
The
AIS -g (generation)> command, when enabled, allows the radio to
override the frame reconstruction process in order to generate a proper
all-ones alarm signal. For example, modem loss of synchronization will
cause all-ones to be transmitted from the active G.703 ports. When
AIS -g
is disabled, the output will consist of a framed signal with all-ones in the
active timeslots. In Fractional operation, AIS generation also creates a
yellow alarm/RAI back to the defective source when a problem is found
at the input. In FE1 mode, when
AIS -g is enabled, loss of Multi-Framing
Alignment Sequence (MFAS) at the line receiver will generate a
Multi-frame Yellow Alarm (MYEL) or Multi-frame Remote Alarm
Indication (MRAI) at the line transmitter.
AIS <-f (forwarding)> is the act of detecting a condition at the input and
causing an appropriate response at the other end. For example, with for-
warding enabled, an all-ones signal applied at one end causes all-ones to
be output at the other. A Remote Alarm Indication (RAI) applied will
likewise appear at the opposite end. Disabling the forwarding function
limits the presentation of alarm signaling to the active timeslots at the
remote end. It is recommended that the
ais -f on or ais --g on command be
used for Fractional operation, to enable alarm generation and for-
warding.
In full-rate modes, the radio will always output AIS when the unit is
unlocked—received radio signal is lost. When the modem is locked, and
the input is removed from one end, you will get all-zeros at the other end
unless AIS generation is enabled. Yellow alarms/RAI are not generated
E1
FT1
FE1