Cisco Compatible 1.25g 1270-1450nm, 80km Optical Transceiver CWDM SFP

General Description

Wavelength Selection: CWDM λ Wavelength Guide Pin Descriptions

Features

● CWDM EML transmitter and APD receiver

● Up to 80km on 9/125µm SMF

● Hot-pluggable SFP+ footprint

● Metal enclosure, for lower EMI

● Support Digital Diagnostic Monitoring interface

● Single +3.3V power supply

● Maximum power consumption 1.5W

● Compliant with SFF+MSA and SFF8472

● Case operating temperature

Commercial: 0 ~ +70oC

Extended: -10 ~ +80oC

Industrial: -40 ~ +85oC

Optical Fiber

There are two basic types of optical fiber used for 10 Gigabit Ethernet: single-mode (SMF) and multi-mode (MMF). In SMF light follows a single path through the fiber while in MMF it takes multiple paths resulting in differential mode delay (DMD). SMF is used for long distance communication and MMF is used for distances of less than 300 m. SMF has a narrower core (8.3 µm) which requires a more precise termination and connection method. MMF has a wider core (50 or 62.5 µm). The advantage of MMF is that it can be driven by a low cost Vertical-cavity surface-emitting laser (VCSEL) for short distances, and multi-mode connectors are cheaper and easier to terminate reliably in the field. The advantage of SMF is that it can work over longer distances.

In the 802.3 standard, reference is made to FDDI-grade MMF fiber. This has a 62.5 µm core and a minimum modal bandwidth of 160 MHz·km at 850 nm. It was originally installed in the early 1990s for FDDI and 100BASE-FX networks. The 802.3 standard also references ISO/IEC 11801 which specifies optical MMF fiber types OM1, OM2, OM3 and OM4. OM1 has a 62.5 µm core while the others have a 50 µm core. At 850 nm the minimum modal bandwidth of OM1 is 200 MHz·km, of OM2 500 MHz·km, of OM3 2000 MHz·km and of OM4 4700 MHz·km. FDDI-grade cable is now obsolete and new structured cabling installations use either OM3 or OM4 cabling. OM3 cable can carry 10 Gigabit Ethernet 300 meters using low cost 10GBASE-SR optics. OM4 can manage 400 meters.

To distinguish SMF from MMF cables, SMF cables are usually yellow, while MMF cables are orange (OM1 & OM2) or aqua (OM3 & OM4). However, in fiber optics there is no uniform color for any specific optical speed or technology with the exception being angular physical connector (APC), it being an agreed color of green. There are also active optical cables (AOC). These have the optical electronics already connected eliminating the connectors between the cable and the optical module. They plug into standard SFP+ sockets. They are lower cost than other optical solutions because the manufacturer can match the electronics to the required length and type of cable.

Mechanical Dimensions

FAQ

1. Question: Just making sure, I can plug an LC fiber connector into these correct?

Answer: Yep, these are LC. 

2. Question: If i wanted to connect a brocade to a netgear using a sfp+ module, if i mixed the brocade and netgear transceivers, they should work right?

Answer: As long as both devices recognize the SFP+ modules installed, i.e. sending/receiving light, then connectivity will work between the two using Ethernet standards. 

3. Question: Is it possible to send to Brazil?

Answer: Yes, of course. 

4. Question: What is the difference between SFP and SFP+?

Answer:

1) The look and the size of the SFP and SFP + are the same;

2) The highest rate of SFP is up to 4G is the rate of SFP + 10G;

3) The protocol specification of the SFP: SFP: IEEE802.3, SFF-8472;

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