Media converter with asymmetric fibre converter

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#2404748 22-Jan-2020 16:16

sbiddle:
I'm still confused why you think you need a new fibre patch cable. The cables are the same, and 99% of fibre cables out there whether LC or SC simply have clips holding both the connectors together. Simply unclip the chis and you're sorted.

This is the 1% that's a solid moulded single connector :-).

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richms

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#2404770 22-Jan-2020 16:28

Saws and dremels are things.

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neb

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#2404773 22-Jan-2020 16:32

richms:
Saws and dremels are things.

I was actually thinking of taking a cold chisel to the 9u fibre, but decided to splash out and get this, I assume that's what's needed in this case?

neb

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#2404774 22-Jan-2020 16:41

neb: I was actually thinking of taking a cold chisel to the 9u fibre, but decided to splash out and get this, I assume that's what's needed in this case?

Aaaannnd... of course there's no indication whether it needs an APC or UPC connector. I'm beginning to understand why these boxes were left lying on a shelf... is it safe to assume it'll be one or the other?

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#2404779 22-Jan-2020 16:55

neb:
richms:

Saws and dremels are things.

I was actually thinking of taking a cold chisel to the 9u fibre, but decided to splash out and get this, I assume that's what's needed in this case?

And that lead wont work, you will have to much loss on that lead with those connectors because they are APC and you need UPC i wouls imagine

Chart is here and the info on the connector type here

As @sbiddle and @cyril7 have mentioned, you will get Full duplex using these converters and just use the Duplex lead that you have and split it.

neb

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#2404783 22-Jan-2020 17:06

sparkz25:
As @sbiddle and @cyril7 have mentioned, you will get Full duplex using these converters and just use the Duplex lead that you have and split it.

See my previous post, the connectors look like this, I'd have to physically cut up the connectors, and then slice through the plastic along 10m of joined cable. If there's no easy alternative I'll do it, but I'd otherwise like to try and avoid fibre surgery.

The converters are free if I want them, but to get the fibre I'll need to provide some form of baksheesh.

sparkz25

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#2404786 22-Jan-2020 17:11

neb:
sparkz25:

As @sbiddle and @cyril7 have mentioned, you will get Full duplex using these converters and just use the Duplex lead that you have and split it.

See my previous post, the connectors look like this, I'd have to physically cut up the connectors, and then slice through the plastic along 10m of joined cable. If there's no easy alternative I'll do it, but I'd otherwise like to try and avoid fibre surgery. The converters are free if I want them, but to get the fibre I'll need to provide some form of baksheesh.

That blue surround is only a clip to hold the connectors together it does come apart you just need to use a small knife to separate and unclip it, the lead has already been split so all you should need to do is separate them by just pulling them apart the entire length of the lead.

neb

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#2404789 22-Jan-2020 17:16

sparkz25:
That blue surround is only a clip to hold the connectors together it does come apart you just need to use a small knife to separate and unclip it, the lead has already been split so all you should need to do is separate them by just pulling them apart the entire length of the lead.

Ah, right, thanks! Just took it to another room with better lighting and there's a very fine line across the side where it clips together. Just need to find a pointy knife in the lunch room...

LurkingKiwi

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#2405344 23-Jan-2020 16:04

neb:
cyril7:

I recon its a BiDi converter (ie single SM fibre) hence one is blanked off, whats exact model number

Claims to be a HTB-GS-03A, but it doesn't look like the one in the original manufacturer's photo. Data sheet is here

So do you have some A-ends and some B-ends, because they won't be field switchable?

neb

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#2406083 24-Jan-2020 14:33

LurkingKiwi:
So do you have some A-ends and some B-ends, because they won't be field switchable?

I've got both A and B ends, an Arse-end in the UK and a Butt-end in the US, so should be OK.

(Not sure what the question is, an SC connector isn't polarised or anything AFAIK so all I need is a length of fibre with an SC connector on each end?).

LurkingKiwi

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#2406153 24-Jan-2020 16:45

neb:
LurkingKiwi:

So do you have some A-ends and some B-ends, because they won't be field switchable?

I've got both A and B ends, an Arse-end in the UK and a Butt-end in the US, so should be OK. (Not sure what the question is, an SC connector isn't polarised or anything AFAIK so all I need is a length of fibre with an SC connector on each end?).

The -A transceiver has a 1310nm transmitter and a 1550nm receiver; join two of them together and nothing will happen.

You need a cross-matched pair, as the -B receives at 1310 and transmits at 1550.

neb

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#2406196 24-Jan-2020 18:54

Oh, the transceivers, not the cable. Sigh, yet another way to make two basic things incompatible.

The two freebies are a matched pair AFAIK, so should be OK, the data sheet says

One set of A must be connected with another set of B for using. A transmitted optical wavelength 1310nm, receive optical wavelength 1550nm; B transmitted optical wavelength 1550nm, receive optical wavelength 1310nm.

You'd think they'd have ones that just autosense/auto-negotiate, relying on someone plugging in the magically right thing at the other end is so 1990s.

richms

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#2406202 24-Jan-2020 19:00

neb: Oh, the transceivers, not the cable. Sigh, yet another way to make two basic things incompatible. The two freebies are a matched pair AFAIK, so should be OK, the data sheet says
One set of A must be connected with another set of B for using. A transmitted optical wavelength 1310nm, receive optical wavelength 1550nm; B transmitted optical wavelength 1550nm, receive optical wavelength 1310nm.
You'd think they'd have ones that just autosense/auto-negotiate, relying on someone plugging in the magically right thing at the other end is so 1990s.

It relies on optics and filters and crap in there, so to make it auto would push the price up with double ups of parts and I guess some form of switchable optics so mechanigal unreliabilty like when cameras have IR filters that switch in and out. These are normally bought by people who are speccing out a whole network so know to match them up in pairs.

I just stuck with 2 port OM3 multimode cheapie stuff for doing things around the house here, but its all on hold now till 10 gig stuff gets more reasonable.

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neb

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#2406207 24-Jan-2020 19:21

richms:
It relies on optics and filters and crap in there, so to make it auto would push the price up with double ups of parts and I guess some form of switchable optics so mechanigal unreliabilty like when cameras have IR filters that switch in and out. These are normally bought by people who are speccing out a whole network so know to match them up in pairs.

Yeah, suspected it'd need an optical splitter and send/receive devices of the correct wavelength so autonegotiate wouldn't be that easy. Sheesh, this stuff is even worse than SCSI used to be.

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#2406213 24-Jan-2020 19:49

Its these. You need a Pair... (Send/Receive on Different Frequencies)

https://www.aliexpress.com/i/32908828315.html

Simplex Media Convertor. (Use a single SC<->SC terminated Single Mode Fibre )

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