• FOM-4SF, Miniature Sync/Async Fiber Optic Modem, transmits and receives data over a single fiber cable.

• The modem operates either in synchronous or asynchronous mode, and supports both half and full duplex communication.

• Transmission rates are as follows:
  • Asynchronous: 0 to 115.2 kbps
  • Synchronous: 64, 128, 256, 512,1024 and 2048 or 1544 kbps.

• FOM-4SF is available with the following interface options:
  • V.24 Interface
  • V.35 Interface
  • RS-530 Interface
  • X.21 Interface
  • E1 Balanced Interface
  • E1 Unbalanced Interface
  • T1 Interface.

• FOM-4SF is available with either 850 nm LED for multimode transmission up to 3 km (1.9 miles), or 1300 nm LED for single mode transmission up to 25 km (15.5 miles).

• FOM-4SF performs diagnostic loops in compliance with ITU V.54 standard. Two V.54 loops are available: local loopback and remote loopback. These loops are activated either by a dipswitch or by the DTE interface: LLB circuit - Pin 18 and RLB circuit - Pin 21.The V.35 interface loopbacks can be activated via the DTE: LLB circuit - Pin JJ and RLB circuit - Pin HH.

• For V.35, V.24, RS-530 and X.21 interfaces operating in synchronous mode, transmit timing can be provided by three alternative sources:
  • Internal oscillator
  • External clock
  • Loopback clock derived from the receive signal.

• The E1 interface utilizes HDB3 line encoding/decoding. The T1 interface utilizes B8ZS line encoding/decoding.

• FOM-4SF incorporates all the advantages of a fiber optic system:
  • Lower attenuation than with copper wires; attenuation is not related to frequency;
  • EMI/RFI immunity which saves the cost of expensive and heavy shielding and complex error checking routines;
  • High data security: risk of eavesdropping is minimized as fibers radiate negligible power; cost of data encryption is reduced;
  • Safety and electrical isolation: no spark hazard and no ground-loop noise problems.

SPECIFICATIONS

• Half and full duplex transmission over single fiber
• Synchronous data rates up to 2048 kbps or E1/T1
  Asynchronous data rates up to 115.2 kbps
• Local and remote V.54 diagnostic loopbacks
• Internal, external or receive clock
• 850 nm or 1300 nm LEDs on the link
• V.24, RS-530, X.21, V.35, E1 or T1 interface options
• LED status indicators
• External 5V power supply, modem includes protection against reverse polarity
• Minimum latency of 0.68 msec
• Lightweight, miniature and easy to install

FOM-4SF/$/+/*
Sync/Async Single Fiber Full Duplex Miniature Modem

ORDERING

FOM-4SF/1/530/FC13
FOM-4SF/1/530/ST13
FOM-4SF/1/530/ST85
FOM-4SF/1/E1U/ST85
FOM-4SF/1/T1/SC13
FOM-4SF/1/T1/ST13
FOM-4SF/1/T1/ST85
FOM-4SF/1/V24/ST13
FOM-4SF/1/V35/FC13
FOM-4SF/1/V35/ST85

 
APPLICATION