Chassis Configuration Settings
GARD 8000 SYS RFL Electronics
April 1, 2012 7-11 973.334.3100
For the multi-protocol interface, select the type of communications from the pull down menu,
RS-449/V.35/X.21.
Interface Data Rate
Indicates the rate of data communications in kilobits per second, This rate is configured by assigning
timeslots in the timeslots configuration page.
Data Rate/Timeslot
Sets the data rate to either 56 kbps or 64 kbps. For modules that do not support this setting the
pulldown menu is not available and 64 kbps is used.
Gard Comms Subsystem
The GARD 8000 has two independent communications busses referred to as communications
subsystems. This parameter allows the user to select which of the two communications busses the
digital interface uses for its transmit and receive data.
Note: Framing, coding, Line Build Out, Octet Timing, and Template do not apply to the digital
interface card.
Gard Clock Mode
Selects whether the interface will be the master or slave of the internal communications bus or an aux
channel. Only one interface per comms. bus can be set as the master. All other interfaces must be
set to slave or aux channel. When it is set to aux channel the interface will connect to an external
device such as a protective relay and transmit data over another comms. interface in the GARD to the
remote end.
Timing
Can be set to Internal or Loop. If set for internal the module will provide the communications
clock. If set for loop the module will rely on an external clock source, a T1/E1 multiplexer or SONET
system for example.
Framing
Farming is not utilized by the Digital Interface Module. For the T1/E1 interface the protocols are:
CCS: Common Channel Signaling
ESF: Extended Super Frame
CAS: Channel Associated Signaling
Framing must be set to enabled if a data rate of more than 64 kbps is selected.
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