CRONYX :: Fiber Optic Modem FOM8

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Russian

Fiber Optic Modem FOM8

Discontinued, recommended replacement is: FMUX/M-E1, FMUX/B-V

Specifications
Optical Transceiver Parameters
Documentation

Features:

Multi mode, single mode or single-fiber fiber link up to 170 km
G.703 interface with data rate 2.048 Mbps
V.35/RS-530/RS-449/RS-232 interfaces wiith data rate up to 8.192 Mbps
Full duplex synchronous mode
Digital, remote and line loopbacks
Integrated BER tester
Dry contacts alarm interface
Stand-alone or rack-mount
AC or DC power
Certificate N OS/1-SP-911 of Russian Ministry of Communications

FOM8 is a high speed (up to 8 Mbps) Fiber Optic Modem with G.703 2048 kbps interface, framed in conformity with G.704/IKM-30 (E1) or unframed, or synchronous digital interface. The device supports point-to-point full duplex synchronous links with selectable data rates up to 8.192 Mbps at ranges longer then any copper modem can achieve (more then 100 km). The modem has two digital interface options: multi-standard interface and V.35 interface. The multi-standard interface has HDB44 female connector and supports RS-232, RS-530, RS-449 and V.35 standards. User has the flexibility to change the interface type by changing only the interface cable. V.35 interface has the standard M34 female connector.

FOM8 is available as a stand-alone unit or as a card for 19'' 3U Cronyx rack.

The modem can be equipped with different optical transceivers.

Specifications

General
Data Rates on Digital Interface	64, 128, 256, 512, 1024, 2048, 4096 and 8192 kbps, Selected by Switch
Loopbacks	Digital, Line, and Remote Loopbacks
G.703 Loopbacks	Line Loopback, Remote Loopback
Dual Remote Loopback support	Yes
Timing Sources	INT (Oscillator), EXT (Digital IF), RCV (Optic Receiver)
Built-in BER Tester	Yes
G.703 Interface
Data Transfer Rate	2048 kbps
Line Code	HDB3
Line Impedance	120 Ohm (Twisted Pair) or 75 Ohm (Coax Cable), Selected by switch
Receive Signal Attenuation Range	from 0 to 43 dB (up to 2.6 km of 22 AWG twisted-pair cable)
Jitter Attenuator	in the receive path, 28UIpp attenuation
Error Detection	Bipolar Violation
Alarm Interface
Connector Type	6 Pins Mini-DIN
Relay Contact Current	up to 250 ma
Relay Contact Voltage	up to 175 VDC

Optical transceiver parameters

Specification	L15	L13X	D13	D13S	D85
Wavelength	1550 nm	1300 nm	1300 nm	1300 nm	850 nm
Fiber Type	Single-mode	Single-mode	Single-mode	Single-fiber, Single-mode	Multimode
Light Source	Laser Diode	Laser Diode	LED	LED	LED
Optical Output Power (avg)	-3 dBm	-3 dBm	-19 dBm	-17 dBm	-20 dBm
Optical Power Monitoring (per G.956)	Yes	Yes	No	No	No
Min. Receiver Input Power (10^-10 BER)	-39 dBm	-39 dBm	-38 dBm	-36 dBm	-39 dBm
Min. Cable Length Limitation	No	No	No	No	No
Optic Cable Power Budget	34 dB	34 dB	17 dB	17 dB	18 dB
Max. Optic Cable Length (depends on optic cable)	85 - 170 km	56 - 85 km	28 - 42 km	28 - 42 km	3.5 - 5 km

Documentation

Some of the documents are in Adobe® Acrobat® Reader® format

FOM8 with interface V.35 / RS-530 / X.21 / RS-232 - User's Manual in Russian
FOM8 with interface G.703 (E1) - User's Manual in Russian
Справочник по интерфейсным кабелям Cronyx.

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