Chassis Configuration Settings
GARD 8000 SYS RFL Electronics
April 1, 2012 7-12 973.334.3100
Coding
For the T1/E1 interface only.
AMI: Alternate Mark Inversion format represents a digital 1 as a square
wave and a digital 0 as a straight line. Each pulse alternates between
positive and negative polarity. Consecutive pulses of the same
polarity constitute a Bi-polar violation (BPV) and the signal is no
longer valid.
8ZS: Bi-polar with 8-Zero Substitution uses intentional Bi-polar violations
to break up long strings of zeros. Any string of 8 consecutive zeros is
replaced with 2 intentional Bi-polar violations before being
transmitted.
HDB3: High Density Bi-polar of order 3. An excessive string of consecutive
zeros (>3) is replaced by a special code containing deliberate Bi-
polar Violations (BPV).
Line Build Out
Set to achieve the required T1/E1 output level to interface with external equipment.
TX/RX Clock Polarity
Defines the clock polarity of the Multifunctional 1/O (RS-449/X.21/V.35)
From the pull down menu select the polarity of the Tx and Rx clock, NORM/NORM,
NORM/INVERT, INVERT/NORM, INVERT/INVERT. This is typically set to NORM/NORM. The
settings NORM/INVERT, INVERT/NORM, INVERT/INVERT are provided to work with non-
standard equipment. The clock polarity of the multiplexer and the multifunction I/O must be the
same.
TX/RX Data Polarity
Defines the data polarity of the Multifunctional 1/O (RS-449/X.21/V.35)
From the pull down menu select the polarity of the Tx and Rx data, NORM/NORM, NORM/INVERT,
INVERT/NORM, INVERT/INVERT. This is typically set to NORM/NORM. The settings
NORM/INVERT, INVERT/NORM, INVERT/INVERT are provided to work with non-standard
equipment. The data polarity of the multiplexer and the multifunction I/O must be the same.
Octet Timing
Used for the G.703 Co-Directional Module. Enable if Octet Timing is required by external equipment.
Note: The GARD G.703 module will not accept data if Octet Timing is enabled but not detected.
Template
Will set all of the required GARD communication bus parameters for the T1/E1 Interface Module.
For example: Terminal 1 means that the module is set to be a terminal multiplexer for comms. bus 1.
There must be two T1/E1 Interface Modules in the GARD system to use the Drop and Insert feature,
one is set to “Pass-Thru 1” and the other is set to “Pass-Thru 2.” The GARD 8000 system supports
either 2 independent terminal multiplexers, or a single drop and insert multiplexer.
After all the settings have been entered click “Save” a confirmation page will appear.
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