Страница 1: ...754 Model List Number Part Number CLEI Code FRC 754 1 150 1354 01 N A PAIRGAIN TECHNOLOGIES INC ENGINEERING PLANT SERIES TECHNICAL PRACTICE SECTION 363 754 100 02 Revision History of this practice Rev...
Страница 2: ...S TECHNICAL PRACTICE Two types of messages identified by icons appear in the text A note informs you of special circumstances Cautions indicate the possibility of damage to equipment or the possibilit...
Страница 3: ...el Unit includes green status LEDs for each line indicating idle ringing and off hook conditions as well as a red LED indicating a fault condition on the Channel Unit The channel unit provides metalli...
Страница 4: ...indications for the FRC 754 Channel Unit front panel LEDs Figure 1 FRC 754 Front Panel Table 1 FRC 754 Front Panel LEDs LED LED State Indicates Solid green Channel is off hook ACTIVE Fast flashing gre...
Страница 5: ...rvisory Range 960 ohms Maximum cable resistance minus 430 ohms for handset is 530 ohms RT Idle State Loop Voltage On Hook 40 Vdc Ring is negative with respect to Tip RT Loop Closure Off Hook Detection...
Страница 6: ...ile or high speed modem operation on all channels 4 2 System Flex Configuration Figure 2 shows a typical PG Flex system that consists of COT Two complete systems may be installed in a 19 inch COT Shel...
Страница 7: ...cted in Figure 2 the maximum distance between the COT and the RT is 10 7 kft 3 3 km assuming the HDSL lines are 24 gauge 0 5 mm Table 2 shows the maximum distance between the COT and RT for various ga...
Страница 8: ...er loop to a metallic test pair protects against secondary surges 5 2 A block diagram of the FRC 754 Channel Unit is shown in Figure 3 One 8 Channel RT Channel Unit supports eight POTS interfaces 5 3...
Страница 9: ...tronic plugs by their connector edges Do not touch components or circuitry 7 1 Install RT Channel Units 1 Insert each FRC 754 Channel Unit into the FRE 765 RT enclosure All LEDs on the Channel Unit wi...
Страница 10: ...present at the RT reinsert the original Channel Unit and Line Unit Test for ringing at the COT 4 Test for ringing into the COT from the CO switch If no ringing is present refer the trouble to the CO...
Страница 11: ...uestions This system is available 24 hours a day by calling 714 730 3299 Transmission speeds up to 28 8 kbps are supported with a character format of 8 N 1 E CERTIFICATION AND WARRANTY 10 Certificatio...
Страница 12: ...tive will void the warranty 11 3 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...
Страница 13: ...Revision 02 January 12 1998 Section 363 754 100 02 PG Flex FRC 754 List 1 PairGain Engineering Plant Series Page 11...
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