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CBL Communication by light GmbH

Laser Link for PDH - LaserLink 4E1

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:

 

Technical data LaserLink 4E1

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

 

Quality of service (QOS)

G.821/826 bit error rate
10E-8 (unfaded)
Delay per terminal

8 µsec

 

Transmitter

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

 

Receiver

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