CRONYX :: Fiber Optic Modem FOM8-E3

English

Russian

Fiber Optic Modem FOM8-E3

Discontinued, recommended replacement is: Nothing

Specifications
Using of the device
Optical Transceiver Parameters
Documentation

Features:

E3 stream (G.703, 34368 kbps) transmittion, both framed and unframed modes
Single-mode or multimode fiber, single fiber available, distance up to 150 km
ITU-T (CCITT) G.703, G.751, G.823 and G.955 standards conformance
Local and remote fiber optic line loopback
Local E3 port loopback
E3 monitor mode
Integrated BER tester
RS-232 control console port
Remote SNMP control using separate Ethernet port
Dry contacts alarm interface
Construction: standalone or 1U rack mount for 19'' cabinet
AC or DC power supply
Certificate N OS/1-SP-911 of Russian Ministry of Communications

The FOM8-E3 device is a high speed fiber optic modem for E3 (34368 kbps) digital data stream transmittion. It covers point-to-point full duplex synchronous data links for distances longer then any copper modem can support (up to 150 km). Use of the devices is also suitable for short distances in case of strong electromagnetic fields environment.

FOM8-E3 is available as a standalone unit or as a 1U rack mount box for 19'' cabinet.

The modem can be equipped with different optical transceivers.

Currently available models are listed in Prices. Please, contact technical support if you are unsure which model to choose.

Using of the device

Typical scheme of using of the device

The device may be controlled by both ASCII terminal (console) connected to RS-232 port and by SNMP using Ethernet connection.

There are two modes of operation: Unframed and Framed.

If in Unframed mode then full bandwidth is used for data transfer in transparent mode.

If E3 stream is framed and NAT bit of the E3 frame is not used by the equipment connected to E3 ports then both local and remote devices may be configured for Framed mode operation. This way virtual monitoring channel will be establish between devices allowing to control remote device and monitor its state from the local console terminal.

Specifications

E3 interface
Connectors type	BNC
Line code	HDB3
Error Detection	Bipolar violation
Line impedance	75 Ohm (coax cable)
Receive signal attenuation range	from 0 to -15 dB
Max cable length	400 m
Overvoltage protection	Sidactors
Overcurrent protection	Fuse
Alarm interface
Connector type	DB-9 (female)
Relay contact current	up to 600 mA
Relay contact voltage	up to 110 VDC or up to 125 VAC
Console port
Interface type, connector type	RS-232 DCE, DB-9 (female)
Data transfer mode	Asyncronous, 9600 bps, 8 bit per character, 1 stop bit, no parity
Modem signals	DTR, DSR, CTS, RTS, CD
SNMP port
Interface type	Ethernet 10Base-T
Connector type	RJ-45
Diagnostic modes
Loopbacks	Local on E3 port, local and remote on fiber optic link
BER tester	Built-in
Control	From local console (control RS-232 port), from console of remote device, by SNMP
Phisical dimensions and weight
Standalone box	210 мм x 260 мм x 70 мм; 1,3 кг
1U box for 19'' rack mount	444 mm x 262 mm x 44 mm; 3,4 kg
Power supply
AC	176 to 264 V, 50 Hz
DC	36 to 72 V
Max power consumption	12.5 Wt
Environmental requirements
Temperature range	0 to 50 ^oС
Relative humidity	Up to 80 %, no condensation

Optical Transceiver Parameters

Specification	TM13	TS13	TS15	TW13	TW15	DW13	DW15
Fiber Type	Multimode 50/125	Single Mode 9/125	Single Mode 9/125	Single Mode 9/125	Single Mode 9/125	Single Mode 9/125	Single Mode 9/125
No. of Fibers	Two	Two	Two	One	One	Two	Two
Minimum Fiber Optic Cable Power Budget	13 dB	29 dB	29 dB	26 dB	26 dB	17 dB	17 dB
Fiber Optic Cable Minimum Length Limitation	No	No	No	No	No	No	No
Maximum Fiber Optic Cable Length (depends on cable parameters)	2 - 5 km	40 - 80 km	80 - 150 km	40 - 60 km	40 - 60 km	25 - 40 km	25 - 40 km
Note				Uses WDM, requires TW15 optical module at opposite end	Uses WDM, requires TW13 optical module at opposite end	Uses WDM, requires DW15 optical module at opposite end	Uses WDM, requires DW13 optical module at opposite end
Transmitter
Transmitter Type	LED	FP LD	DFB LD	FP LD	DFB LD	FP LD	DFB LD
Wavelength	1310 nm	1310 nm	1550 nm	1310 nm	1550 nm	1310 nm	1550 nm
Optical Output Power	-19 dBm	-5 dBm	-5 dBm	-8 dBm	-8 dBm	-14 dBm	-14 dBm
Spectral width	200 nm	3 nm	1 nm	3 nm	1 nm	4 nm	2 nm
Receiver
Maximum Input Optical Power	-14 dBm	-3 dBm	-3 dBm	-3 dBm	-3 dBm	0 dBm	0 dBm
Receiver Sensitivity	-32 dBm	-34 dBm	-34 dBm	-34 dBm	-34 dBm	-31 dBm	-31 dBm

Documentation

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

Optical modem FOM8-E3 - Installation and Operating Manual (in English)
Optical modem FOM8-E3 - Installation and Operating Manual (in Russian)
MIB-files for SNMP-management

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