Section 363-712-100
Revision 02
Page 4
4. CERTIFICATION
4.01
FCC Compliance. The FLL-712 COT Line Unit
complies with the limits for Class A digital devices
pursuant to Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful
interference when the equipment is operated in a
commercial environment. This equipment generates, uses
and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may
cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely
to cause harmful interference in which case the user will
be required to correct the interference at his own expense.
4.02
Refer to the installation section of the appropriate
practice for the unit being installed to get information on:
•
Cabling
•
Proper connections
•
Grounding
•
Line power
4.03
All wiring external to the product(s) should
follow the provisions of the current edition of the National
Electrical Code.
5. WARRANTY
5.01
PairGain Technologies warrants this product to be
free of defects and to be fully functional for a period of 5
years from the date of original shipment, given proper
customer installation and regular maintenance. PairGain
will repair or replace any unit without cost during this
period if the unit is found to be defective for any reason
other than abuse or improper use or installation.
5.02
This module should not be field repaired. If it
fails, replace it with another unit and return the faulty unit
to PairGain for repair. Any modifications of the unit by
anyone other than an authorized PairGain representative
will void the warranty.
5.03
If a unit needs repair, call PairGain for a Return
Material Authorization (RMA) number and return the
defective unit, freight prepaid, along with a brief
description of the problem, to:
PairGain Technologies, Inc.
2120 Ritchey St.
Santa Ana, CA 92705-5101
ATTN: Repair and Return Dept.
(714) 832-9922
(800) 638-0031
5.04
PairGain will continue to repair faulty modules
beyond the warranty program at a nominal charge. Contact
your PairGain sales representative for details and pricing.
B. FUNCTIONAL DESCRIPTION
6. OPERATIONAL CAPABILITIES
6.01
The FLL-712 COT Line Unit provides the
following functions for each 24-channel system in a single
COT shelf:
•
System Power Supply
•
HDSL Line Transceivers and Simplex RT
Power
•
Front-Panel Status Indicators
•
RS-232 Maintenance Interface (DCE)
•
Switched Access to the Metallic Bypass Pair
•
MLT/PGTC Loop Test System (List 2)
compatibility
•
4Tel Loop Test System (List 1, 2) compatibility
6.02
A block diagram of the FLL-712 is shown in
Figure 3. The power supply converts CO battery into
voltages necessary to power the PG-Flex electronics
including ±130 Vdc, which is simplexed onto the carrier
pairs to power the remote electronics. During power-up,
the system checks the HDSL lines for hazardous voltages
or other line faults which might effect the system. If a fault
condition is detected, the system will not complete the
power-up sequence and the LED indicators on the front
panel will indicate a line fault problem on the front panel
LED indicators.
6.03
The RS-232 Maintenance Port located on the
front of the Line Unit (see Figure 1) enables the technician
to configure and test the PG-Flex system using an ASCII
terminal (see Section 8). A terminal is not required for
normal installation and operation of PG-Flex, but may
facilitate troubleshooting procedures on the HDSL line.
