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LaserLink 4E1
The LaserLink 4E1 is especially developed for connecting PBX systems with E1-Interfaces, standardised as CCITT G.703 framed/unframed. Up to four independent signals could be connected via RJ45. Four extremely durable light emitting diodes are used, which create an optical aperture of 4 times 60mm in diameter. Thus the systems are very inured to snow, rain and interruptions caused by birds. These systems can also be used in GSM and UMTS networks to connect microcells and basestations.
 Complete catalogue for Carrier Solutions: LaserLinks in GSM/UMTS networks (4.1 MB)
An interactive presentation for the GSM/UMTS solutions is available here (3,2 MB)
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Technical Data |
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Laser-Link 4E1 |
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| Capacity |
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4 x E1 = 4 x 2.048 Mbps |
| Interface |
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G.703 |
| Physical connection |
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Sub-d25, all 120 Ohms |
| Recommended distance |
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50 .. 2000 meters depending on climate |
| Optical performance |
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| Optical system budget |
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at 800 m: 29 dB |
| Maximum attenuation at distance |
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36 dB/km at 800 m |
Theoretical distance at 10 dB/km
at 30 dB/km |
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2,100 m
900 m |
| Minimum visibility at installed distance |
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470 m at 800 m |
| Quality of service |
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| G.821/826 BER |
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10E-8 (unfaded) |
| Delay of each terminal |
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8 µsec |
| Transmitter |
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| Multi beam technology |
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4 x IR-LED |
| Wavelength |
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860 +/- 10 nm |
| Launched power |
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4 x 20 mW (eq +19 dBm) |
| Aperture |
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4 x 60 mm diameter |
| Total transmitting area |
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113 sqcm |
| Divergence |
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10 mrad |
| Laser class |
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1M, eye safe |
| Receiver |
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| Aperture |
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257 mm diameter |
| Total receiving area |
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520 sqcm |
| Field of view |
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5 mrad |
| Type |
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Si-PIN-TIA |
| Sensitivity |
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+3 .. -45 dBm optical (BER 10E-6) |
| Dynamic Range |
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48 dB |
| Dry alarm contacts |
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yes |
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| Miscellaneous |
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| Built-in telescope |
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yes |
| Local and remote loop |
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sep. per E1-channel / all |
| Bit error rate indicator |
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yes |
| 10 LED bar-graph level indicator |
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yes |
| Reducing power steps |
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16 dB + ATPC |
| Automatic power control |
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ATPC 6 dB |
| MTBF |
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more than 100,000 hours |
| Movement on holder |
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azimut 360 deg., elevation +/- 25 deg. |
| Front screen defroster |
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optional |
| Housing |
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Aluminum, powder coated |
| Power supply |
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48 VDC and/or 115/230 VAC 50 .. 60 Hz |
| Power consumption (without defroster) |
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17 VA |
| Dimensions |
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790 mm x 306 mm x 283 mm |
| Weight |
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9,3 kg |
| Protection class |
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IP 64 |
| Operating temperature |
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-40 .. + 50 deg. C (-40 .. +122 deg F) |
| Storage temperature |
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-40 .. + 80 deg. C (-40 .. + 176 deg. F) |
| Wind load at 200 km/h |
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max. 500 N |
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