FAQS
F:
400GbE Subcommittee
A:
As bandwidth requirements for Ethernet networks continue to increase exponentially, the 400GbE Subcommittee is chartered to support the definition and development of the next speed of Ethernet.  The subcommittee will support 400GbE by building consensus for the requirements for and standardization of 400 Gigabit Ethernet. The subcommittee will also support the building of  industry awareness and understanding through the development of  white papers and webinars.  This subcommittee is a platform for gathering and exchanging data relative to observed deployment models, applications, reaches, and sharing that information both within the Ethernet Alliance membership and outside of it.
F:
40G and 100G Ethernet
A:

IEEE Std. 802.3baTM-2010

This subcommittee has developed baseline proposals accepted by the IEEE Std. 802.3baTM-2010 Task Force for increased performance levels for data center and long-haul networking applications.
The project includes backplanes, short-reach copper cabling, medium reach multi-strand fiber, and long-reach single-mode fiber physical layers.

F:
Do POFLink's SFP+|XFP|SFP meet Class I laser safety requirements?
A:

POFLink's SFP+|XFP|SFP transceivers are full compliant with FDA 21 CFR 1040.10 and 1040.11 Class I laser safety standards.
These products are certified by TUV and CSA to meet the Class 1 eye safety requirements of EN (IEC) 60825 and the electrical safety requirements of EN (IEC) 60950. Copies of these certificates are available from POFLink's upon request.

F:
What is DWDM?
A:

DWDM-Dense Wavelength Division Multiplexing

Up to 40/80 DWDM wavelength over one pair of fiber

DWDM highlights

Up to 90 DWDM wavelength over one pair of fiber
DWDM channel spacing 0.8 nm (100 GHz grid) or 0.4 nm (50 GHz grid)
Distances over 1,000 km can be achieved with the use of optical amplifier
DWDM wavelength: 1528 nm (channel 61) to 1563 nm (channel 17)

The functionality of DWDM resembles to the one of CWDM. Unlike to CWDM technology, the channel spacing for DWDM is 0.8/0.4 nm (100 GHz/50 GHz grid). This small channel spacing allows to transmit simultaneously much more information. Currently a restriction on wavelengths between 1530 nm and 1625 nm exists which corresponds to the C and L band. In this connection DWDM
wavelengths from DWDM technology is more expensive compared to CWDM caused by the need of more sophisticated transceivers.

F:
What's CWDM?
A:

CWDM (Coarse Wavelength Division Multiplexing)

CWDM highlights

Up to 16 CWDM wavelength over one pair of fiber
CWDM channel spacing 20 nm, 1720 nm to 1610 nm
Distances up to 120 km
Cost-effective WDM solution
Scalable by hybrid CWDM/DWDM - perfect solution for your investment
CWDM principle
Coarse Wavelength Multiplexing (CWDM) is a wavelength multiplexing technology for city and access networks. Transmission is realized using 16 channels with wavelengths between 1270 nm and 1610 nm.
Due to the channel spacing of 20 nm cost-effective lasers can be used. The channel width itself is 13 nm. The remaining 7 nm is designed to secure the space to the next channel.

F:
What is POFlink's QC Policy?
A:

POFLink teams believe that our customers define quality.
They do this daily with final products purchased and services provider.
Our customers prefer products and services based on perceived value - that is, they measure the benefits against the costs and then select the products.They prefer service that provides them most value. POFLink has received the ISO9001:2008 certification issued by the world famous authority organization TUV and all processes regarding research and development, manufacture and services are established and standardized based on ISO9001:2008 requirements. POFLink is committed to maintaining our Quality Management System to conform to the requirements of ISO 9001:2008. POFLink's products have been tested according to American and European product safety and electromagnetic compatibility regulations and also received relevant certificates such as RoHS, UL, FCC.
POFLink strives to enhance and perfect all processes in order to guarantee products of the highest level of quality and reliability. We are committed to building on a foundation of years of design and manufacturing experience.
Quality expectation of suppliers:
POFLink's suppliers play a vital role in helping us achieve the highest quality products in the industry today. We expect our suppliers to work with us as partners to establish and achieve goals and objectives for superior Quality. We expect our suppliers to have in place a quality management system that is equivalent to that described in the international ISO 9001:2008 standard.

F:
What is WDM?
A:

WDM (Wavelength Division Multiplexing)

Was bedeutet WDM? – Grundlagen zur WDM Technologie

In der Informationstechnologie bezeichnet man das Medium, über das die Informationen übertragen werden, als Leitung. Wenn zwei Stationen miteinander kommunizieren möchten, reicht eine Leitung aus. Bei mehreren Stationen benötigt man mehrere Leitungen. Was aber, wenn man nur eine Leitung z.B. zwischen zwei Städten zur Verfügung hat, aber mehrere Stationen anbinden will? Mit der WDM-Technik lassen sich Glasfaserleitungen mehrfach für die Datenübertragung nutzen.

Ziele der WDM Technologie

Mehrfachnutzung von Glasfaserleitungen mit WDM
Einsparung von gemieteten Glasfaserleitungen - Kostensenkung
Erhöhung der Bandbreitenkapazität ihrer Glasfasernetze

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