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F271XA

Fiber-Optic

Telephone Modem

Technical Manual

Revision B

© August 2011

VERSITRON, Inc.

83 Albe Drive / Suite C

Newark, DE 19702

www.versitron.com

Safeguarding Communications Since 1958

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Summary of Contents for F270XA

Page 1: ...F271XA Fiber Optic Telephone Modem Technical Manual Revision B August 2011 VERSITRON Inc 83 Albe Drive Suite C Newark DE 19702 www versitron com Safeguarding Communications Since 1958...

Page 2: ...arranty does not cover damage to products caused by misuse mishandling power surges accident improper installation neglect alteration improper maintenance or other causes which are not normal and cust...

Page 3: ...ne Modem Section 1 provides a general description of the equipment Section 2 provides installation instructions Section 3 provides operating instructions Section 4 provides the theory of operation Sec...

Page 4: ...e converse occurs in the other direction for the F271XA The telephone modem transmits analog signals of 300 to 3400Hz 1 2 3 Physical Characteristics The telephone modems measure 7 0 wide x 0 84 high x...

Page 5: ...3 x 48 0 x 35 0 cm 2 Slot Rack Mount Chassis Side by Side PSAC08 PSAC09 LTWPD1210PLX LTWPD1210EPL HF 20A 32406 7 0 H x 19 0 W x 11 6 D 17 8 x 48 0 x 29 5 cm 20 Slot Rack Mount Chassis AC300WR 32410 VM...

Page 6: ...Twisted Pair Audio Signal Analog 300Hz to 3 4Khz Idle Channel Noise 65dBm Single Frequency Distortion 46dB 2nd Harmonic Distortion 55dB Talk Battery 44 to 52 VDC Loop Current 40mA max off hook Ring S...

Page 7: ...at the copper and fiber optic cables are not mechanically separated from the modem during operation When installed in either desktop chassis or in the dual card rack mount chassis space for the power...

Page 8: ...nge 2 3 3 Default Jumper The remaining jumper J1 is open and should not be changed 2 4 Power Requirements The F271XA products are designed to operate from an AC power transformer or a DC power source...

Page 9: ...in a standalone or dual card rack mount chassis a power transformer is plugged into barrel jack J3 When installing the Telephone Modem in a 20 Slot rack mount chassis HF 20Aor VMX20 with optional pow...

Page 10: ...click into place 2 6 Initial Checkout Procedure F271XA telephone modems contain no power on off switch Once power is connected the Modem will go through its power up sequence When the System LED see...

Page 11: ...here are five indicators used on the F271XA Link Status Link Transmit Data TX Receive Data RX System Status System and a multi function LED for the telephone port see Table 7 for descriptions Table 7...

Page 12: ...an alarm circuit Therefore the Alarm signal on the P1 connector will not be driven by this unit 4 3 Functional Description The unit consists of the following circuits 4 3 1 Ring Detection 4 3 2 Ring...

Page 13: ...phone CODEC chipset 4 3 5 Fiber Optic Transceiver Circuit Fiber optic communications are handled by the SFP module The power for this module is isolated from the other power circuits through filters T...

Page 14: ...current condition Power off the unit for a few minutes and retry Other Contact VERSITRON for assistance Link Status Link LED is OFF Incorrect optical signal level received at receiver input 1 Check t...

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