Fo modem G.703 E1 2Mb/s kompl
Article Number: 21-170
- Fiber optic G.703 E1 Converter
Function
The 21-170 is a G.703 format comverter between G.703/704 2Mbps interface and proprietary 64kbps fiber optical interface. The optical interface can be connected to other fiber optical converters from Fibersystem as the 21-16xx (for X.21, RS530, etc). or the 21-180 for balanced G.703. The 64kbps data is inserted and extracted from time slot 31 in the G.704 frame structure leaving the orher time slots available for usage.
The converter adapts the data rate to the incoming E1 signal by a digital PLL or in a back to back configuration it can be set to use its internal reference.
Fiber optic G.703 64kbps Codirectional
The ITU-standard "G.703 64kbit/s codirectional interface" describes a galvanic interface.
This interface.is commonly used by teleprotection equipment for connection to telecom multiplexers.
The 21-170 converts the codirectional interface signals to a proprietary fiber optic protocol used for example by teleprotection equipment from ABB.
G.703/704 E1 Unbalanced
The ITU-standard G.703 describes the physical and electrical characteristics of hierarchical digital interfaces at rates up to 140 Mbps.
G.704 describes frame structures on G.703 interfaces up to 45 Mbps.
E1 describes a galvanic G.703 interface with G.704 frames at 2048 kbps commonly used in telecommunication.
Applications
The 21-170, Fiber Optic G.703 E1 Converter is intended to extend distance and to provide galvanic isolation for disturbance free insertion of 64kbps data into SDH/PDH 2Mbps G.703 connections by the use of the G.704 framing structure,
The converter is compatible with the FOT module in ABB's teleprotection terminals 550/560 for connecting the terminals to higher order networks.
The 21-170 converter running of its internal clock can also be used to directly interconnect protection equipment over leased lines using electrical E1 modems as SHDSL and alike.
Technical Data
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Data Speed
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64 kbps
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Protocol
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Fibersystem proprietary 64kbps
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Fiber
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Multi mode 50/125µm or 62,5/125µm, ST-connector
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Optical System Budget
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13dB in 62,5/125µm. 9dB in 50/125µm fiber
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Typical distance
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0-2km (3dB system margin for 50/125µm and 6dB for 62,5/125µm)
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Galvanic Data speed
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2048kbps
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Galvanic Protocol
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G.703, E1
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Connector
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2 x BNC , Coaxial cable
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DC
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48V DC to 250V DC, ±20%
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AC
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230V AC , ±20%, 50 60 Hz
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AC-connector
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IEC 320, 3-pin
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Operating Temperature Range
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-25 to +55°
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Storage Temerature Range
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-40 to +85°
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Relative Humidity Operating
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5 to 95%
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Relative Humidity Storage
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5 to 95% non condensing
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Immunity
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EN 61000-6-2
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Emission
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EN 61000-6-4
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LVD
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EN 50187; RIV=250 V OVC=III
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Vibration
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IEC 60255-21-1 Class 2
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Shock
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IEC 60255-21-2 Class 2
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Seismic
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IEC 60255-21-3 Class 2
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ESD
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IEC 60255-22-2 Class 3, contact 6kV, air 8kV
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Radiated
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IEC 60255-22-3 / IEEE/ANSI C37.94.2; 35V/m
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Burst Power
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IEC 60255-22-1 Class III
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Burst Communication
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IEC 60255-22-1 Class II; 0,5kV diff; 1kV common mode
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Fast Transient Power
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IEC 60255-22-4 Class IV
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Fast Transient Communication
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IEC 60255-22-4 Class II; 1kV
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Dielectric Test
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IEC 60255-5, 2,0kV 1min
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Impuls Voltage Test
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IEC 60255 / EN50178 5kV / 6 kV
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Insulation Resistance
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IEC 60255-5; > 100Mohm at 500VDC
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Physical size
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Height 45mm, Width 483mm, Without brackets 380mm), Depth 173mm
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Weight
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3 kg
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Features
- Fiber optic transmission, immune to EI and RFI.
- Standards compliant for power substation installations
- 19" mounting with only 200mm depth
- Single power supply range from 48VDC to 230VAC
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