Datasheet for SFP

[jmills001111]

I have a couple of SFP in my network for which I have no Data Sheets. They are installed in a Cisco IE 3010 Switch. The information that I can obtain is as follows: Cisco-Avago Part No SFCT-5798PZ-CS2 ser no AGC1420UAM5 and AGC1420UAN3.

I have contacted Avago, but they say that they are proprietary cisco product. I am unable to find anything more specific.

Please can anyone tell me where to get the data sheets?

[Tom Randstrom]

SFP transceivers modules typically provide speed and reach information on the module label or available via CLI query; typically listed as 1000BASE-LX, 100BASE-FX, etc.   

For Gigabit Ethernet SFPs, I would use the linked data sheet for specifications based on the speed and reach.  

Their are transceiver compatibility documents by platform for the Gigabit Ethernet and Fast Ethernet SFPs on the Cisco website.  

I hope this helps you get the information you are looking for!

[jmills001111]

Thanks, it certainly helped.

Unfortunately the description of the SFP from the switch is 1000baseLX, ie 1310nm, but the SFP at the other end of the link is 1550nm, The AVAGO sfp fitted do not have DDM so I am unable to get any Tx or Rx signal levels. I know my fibre losses are 3db and the rec level at the other end of the link is -23dBm, so I suspect an attenuator has been fitted.

So this is why I really need the actual data sheet.

Looks like an engineer will need to visit.

[Tom Randstrom]

If the installed SFP's are Cisco modules, then the link to the data sheet would contain the correct specifications (excerpt below). For a 3db link, a 1550nm module (1000BASE-ZX) would be extreme overkill.  Good luck.   

[Marvin Rhoads]

jmills,

If one end is an LX and the other end is a ZX, they won't negotiate a link successfully no matter what the Rx power is.

[jmills001111]

Hi Marvin, That's what I thought, but then the system is working, and what is more I have found mismatched pairs elsewhere along the system (it is a chain of IE3010 switches). The engineers will be attending site and swapping them out.

[Tom Randstrom · Accepted solution]

Best practices would dicate that the ends of the fiber link should use the same reach optical modules; as this makes for easier upfront link engineering and more imporantly, simplifies future troubleshooting, maintenance and repair.

In this case, the LX and ZX both operate over SMF cable.  The transceiver's receivers normally operate across a wide frequency range, so the 1310nm module's receiver will work with a 1550nm signal (and vise versa).  However, the transceiver modules are typically spec'd at their transmit wavelength, so their performance may very slightly with a non-native wavelength; and vendors may not warranty support these mismatched installations. 

[jmills001111]

Thanks Tom, I was thinking that one 1550nm Tranceiver Receiver was totally blind to the other 1310nm Tranceiver Transmitter, so this answers why I have a working link.

The long term plan will be to correct the mismatch.