The LNW57 high-speed circuit pack is a long-reach (80 km) OC-192 1533.47 nm circuit pack. The LNW57 supports OC-192 add/drop, UPSR, and BLSR configurations, single- and dual-homing, non-revertive linear and bidirectional 1+1 protection switching, and VT1.5, STS-1, STS-3(c), STS-12(c), and STS-48(c) signal transport. The LNW57 circuit pack can cross-connect VTs in any 48 of 192 STS-1s in the OC-192 signal. The Stratum 3 timing generator and central TDM switch fabrics are embedded in the OC-192 OLIU. The LNW57 circuit pack may occupy Main slots 1 and 2. Fiber access is provided via a pair of LC-type connectors on the LNW57 faceplate. The LNW57 circuit pack utilizes a "dither tone" to frequency modulate the laser. This technique is used to minimize the effects of Stimulated Brillouin Scattering (SBS). At high optical launch powers, SBS can cause an acoustic back-scattering phenomenon in fibers. The dither tone effectively broadens the spectrum of the narrow optical pulse, thus raising the threshold power where SBS becomes an issue. Normally, Alcatel-Lucent recommends that optical output of the OC-192 circuit packs be amplified to no more than +10 dBm. However, with the dither tone circuit incorporated into the LNW57 circuit pack, optical amplification of this circuit pack to much higher power levels is acceptable. For fibers carrying multiple wavelengths in DWDM systems, it should be noted that the individual channel (individual wavelength) power determine the SBS threshold, not the total composite power of all the channels.
Features:
- long-reach (80 km) OC-192 1533.47 nm circuit pack
- supports OC-192 add/drop, UPSR, and BLSR configurations
- can cross-connect VTs in any 48 of 192 STS-1s in the OC-192 signal
- Stratum 3 timing generator and central TDM switch fabrics are embedded
Whats in the Box?
Specifications:
General Information
