Perfect suited for E1-transmission (2,048 Mbit/s) is the LaserLink 4E1. Up to four independent S2m/E1-signals can be connected via copper cable. Four LED generate a transmitting aperture of 4 x 60 mm in diameter. For that reason the link is very robust against snow, rain and crossing birds.
LaserLink 4E1 is suited for connection of microcells or base stations in GMS / UMTS networks.
SNMP/web-based out-band-management is available via IP (Ethernet 10/100BT) access:
| Bandwidth |
4 x E1 = 4 x 2.048 Mbit/s | |
| Interface |
G.703 | |
| Connector |
Sub-D25, 120 Ohm | |
| Recommended distance |
50 .. 2000 Meter, depending on climate |
| Optical budget |
at 800 m: 29 dB | |
| Maximum attenuation at 800 m | 36 dB/km | |
| Theoretical distance at 10 dB/km atmosph. attenuation |
2.100 m | |
| and at 30 dB/km | 900 m | |
| Minimum line of sight at hop distance | 470 m at 800 m |
| G.821/826 bit error rate | 10E-8 (unfaded) | |
| Delay per terminal |
8 µsec |
| Multi beam-technology |
4 x IR-LED |
|
| Wavelength |
860 +/- 10 nm |
|
| Outgoing power |
4 x 20 mW (eq +19 dBm) | |
| Aperture |
4 x 60 mm diameter | |
| Transmitting area |
113 cm² |
| Divergence |
10 mrad | |
| Laserclass |
1M, eye-safe |
| Diameter | 257 mm | |
| Receiving area |
520 cm² | |
| Acceptance angle |
5 mrad | |
| Typ | Si-PIN-TIA | |
| Sensitivity | +3 .. -45 dBm optical (BER 10E-6) | |
| Dynamic range |
48 dB optical |
|
| Dry alarm contacts |
yes |
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