Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[burakkucat]

The current itch, which requires scratching, relates to Adva Optical Networking's Small Form-factor Pluggable (SFP) transceivers.

A sweep of eBay has provided a list of eight different transceivers and, in the list that follows, the first column is the Adva part number and the second column is the description . . . a semi-cryptic sequence of five abbreviation fields separated by a slash (/) character.

Adva Part #       Description

0061003002        SFP/LS/1310S/SM/LC
0061003003        SFP/LS/1310L/SM/LC
0061003012        SFP/LS/B1310S/SM/SC
0061003013        SFP/LS/B1550S/SM/SC
0061003016        SFP/LS/B1310L/SM/SC
0061003017        SFP/LS/B1550L/SM/SC
0061702491        SFP/4GU/C1470V/SM/LC
0061705844        SFP/2G1/850I/MM/LC

Of the five abbreviation fields of each transceiver's description some can be deduced --

No. 5        The connector type. LC - Lucent Connector. SC - Subscriber Connector.
No. 4        The mode of the optical fibre. SM - Single Mode. MM - Multi Mode.
No. 3        The digits are the transmit wavelength, in nm.
No. 2        Unknown.
No. 1        Small Form-factor Pluggable.

My problem is understanding the meaning of No. 2 and fully interpreting No. 3.

Looking closely at abbreviation field No. 3.

For the first six transceivers, I believe that the letter appended to the transmit wavelength is an indicator of working length of the fibre. S - short reach. L - long reach.

For the four transceivers taking an SC, I believe that the letter prepended to the transmit wavelength, B, signifies bi-directional. Those of us who have some familiarity with Openreach's Ethernet Access Direct product will recognise these four transceivers as two matched pairs (part numbers 0061003012 & 0061003013 and 0061003016 & 0061003017).

Comments, corrections and additions would be appreciated, please.

[licquorice]

LC connectors have a physically smaller form factor than SC. 1310nm and 1550nm are standard single mode wavelengths and would typically have long and short reach variants of transmitter output power. 850nm is a standard multimode wavelength. The 1470nm wavelength is I believe used for CWDM (coarse wave division multiplexing). All of which confirms your suppositions but doesn't help with the unknowns.

[tubaman]

Not the exact same ADVA products, but the definitions section on this page - http://www.bell-enterprise.com/products/adva/fsp-2000/ appears to indicate that LS = 'Low Speed'.

Some other definitions are also on http://www.bell-enterprise.com/products/adva/

Page 45 of this presentation may also assist - http://www.uran.net.ua/archives/2006oct-pos/renneberg-optical-network.ppt

Yes, it's quiet here this morning!

[burakkucat]

Thank you, both, for the useful comments and links. 

[smf22]

A little digging has found the Adva Fiber Service Platform 3000 R7 Hardware Description manual available on the DocSlide website.

The information required can be found in Chapter 12 Pluggable Transceivers, and more specifically the section Transceiver Naming Conventions. In this section there are definitions of each of the fields and the possible values used within those fields. Navigation directly to this section is possible by entering page 661 into the navigation box located in the dark area at the lower part of the displayed page.

From the aforementioned document the second field describes the data rate with the value specified being the maximum supported. For example the 4GU is "universal data rates between 1.062 Gbit/s, 2.125 Gbit/s and 4.250 Gbit/s", 2G1 is "1.062 Gbit/s, 1.250 Gbit/s and 2.125 Gbit/s". There's no mention of LS in this section, presumably as the FSP 3000 doesn't support those older lower speed transceivers, but HS is mentioned as "1.062 Gbit/s and 1.250 Gbit/s".

There's the option to download the hardware manual from DocSlide, which I've done, but I've not uploaded it here as it's 90MB in size. Happy to make available if anyone wants it, though as I say, direct download from DcoSlide is available.

Regards

[burakkucat]

Thank you for finding that information. I think that answers any residual doubts over the meaning of the second field of the description.

I've also downloaded the manual (plus two others) . . . which will now keep me occupied for a little while. 

[burakkucat]

Another transceiver has been noticed --

Adva Part #       Description

0061000465        SFP/HS-HT/1310S/SM/LC

Once again the second field, "HS-HT", is semi-mysterious. The "HS" will be signifying high speed but the meaning of the "-HT" eludes me.

Any suggestions, please?