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Summary of Contents for Versitron 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 No other warranty is expressed or implied, and VERSITRON is not liable for direct, indirect, incidental or consequential damages or losses.
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Page 3: Description Of Equipment
Section 4 provides the theory of operation. Section 5 provides maintenance and troubleshooting information. Figure 1 and Figure 2 provide an overall view of the Telephone Modems. Figure 1: Front View, F271XA (Top Unit) Figure 2: Rear View, F271XA www.versitron.com... - Page 4 The telephone modems measure 7.0" wide x 0.84" high x 11.6" deep (17.8 x 2.1 x 28.9 cm) and are designed to be mounted in a variety of VERSITRON enclosures and chassis (see Table 1 for dimensions of enclosures and chassis). "Desktop" option is a single-card enclosure. Rack- mount options include a 2-Slot and 20-Slot 19”...
- Page 5 (17.8 x 48.0 x 29.5 cm) (19-Multiplexed Slots) (32410) *¹ Note: US Model – PSAC08; European Model – PSAC09 *² Note: One Power Supply per Modem required. Table 2: Front Panel Status LEDs Link Not Used Not Used Not Used System Port 1 www.versitron.com...
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Page 6: Electrical Interface
Will accept a variety of SFP modules for Fiber-optic interface VERSITRON Versimux II compatibility. Supports data up to 14.4kbps via dial-up modem or facsimile. NOTE: F270XA and F271XA are not backward compatible with F270X and F271X www.versitron.com... -
Page 7: Installation
Table 3: SW1 Switch Settings Position Ring-down Operation Normal Operation SW1-1 SW1-2 Factory setting* SW1-3 Factory setting* Factory setting* SW1-4 SW1-5 Factory setting* SW1-6 Factory setting* Factory setting* SW1-7 SW1-8 Factory setting* * Note: Factory settings as indicated. Do Not Change. www.versitron.com... -
Page 8: Default Jumper
The F271XA products are designed to operate from an AC power transformer or a DC power source in the range of +10 to +16 VDC. 2.4.1 Installation with AC Power Before inserting the VERSITRON power transformer, PSAC08 (US) or PSAC09 (EUR), www.versitron.com... -
Page 9: Installation With Dc Power
Not Used Not Used Table 6: (P1) Chassis Power/Alarm Wiring Pin Number Signal Designation +12 VDC +12VDC Signal Ground Signal Ground Signal Ground Frame Ground (Chassis) System Alarm Interface Signal Ground Signal Ground +12 VDC +12 VDC +12 VDC www.versitron.com... - Page 10 3. Verify that the Link LED (see Table 2) is lit when the fiber-optic cable is connected and the units, both local and remote, are powered. If a malfunction is detected during the initial checkout procedure, refer to Section 5 for information on isolating the malfunction in the unit. www.versitron.com...
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Page 11: Operation
Indicates System is active and configured (ready for operation) System Indicates the following : Off: Phone is On-Hook On: Phone is either Off-Hook or Call is in progress Flashing: Phone is ringing. * See Table 2 for LED mapping www.versitron.com... -
Page 12: Theory Of Operation
These Modems are designed to work with F270XA exchange side telephone modems or another F271XA in pairs and interface with audio grade signals. These units are housed in VERSITRON FOM II chassis: HF-1, HF-2SS and HF-20A or in a VMX20 Versimux II chassis. Chassis descriptions are found in section 1.2.3 . - Page 13 The FPGA is used to transmit the digitized audio signal from the telephone port. In essence, it is an asynchronous-to-synchronous converter encoded using proprietary VHDL programming designed at VERSITRON. A 8.192MHz Oscillator, Y1, provides the clock input to the FPGA. The FPGA also performs configuration operations for the phone CODEC chipset.
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Page 14: Maintenance And Troubleshooting
5.2 Fault Isolation The steps in Table 8 should be taken to check a non-operating modem. Contact VERSITRON Customer Service for additional diagnostic assistance or to arrange for repair as necessary. Table 8: Non-Operational Indicators...
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