1310nm SFP+ module for 6100?
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@jarhead single mode uses lasers, multi mode uses leds it that simple.
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You can see MM light with your eye, and stop being "foolish"
You can't see SM light wo. electronic help (ie. phone cam).Some SM are long range - 70Km+ (Costly SFP's, high power laser diodes)
They are "Dangerous" for your eyesight, even short exposure. -
@bingo600 said in 1310nm SFP+ module for 6100?:
You can see MM light with your eye, and stop being "foolish"
You can't see SM light wo. electronic help (ie. phone cam).Some SM are long range - 70Km+ (Costly SFP's, high power laser diodes)
They are "Dangerous" for your eyesight, even short exposure.Hence these warning labels:-
https://www.comtecdirect.co.uk/product/fibre-laser-warning-labels/PG0668/782399
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Most (all?) SFP modules, even high power versions, will not emit anything beyond the class 1 laser rating unless they are seeing incoming signal from the other end. So it should be extremely difficult to actually do any damage. But I'm not about to test that with my eyes.
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Quick update...
It sounds like I'm the first 10G install my ISP (it is a new ISP) has done which is pretty fun. It also sounds like they are eager for this too and want to make sure it works.They said the Nokia ONT is pretty flexible in terms of optics and DACs it'll work with. That takes a lot of pressure off me for the install.
I have several DACs which, while not officially approved, work with the 6100.
It sounds like they have a big inventory of SFP+ modules too from FS we can try.
I'll let yall know how it goes.
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@stephenw10 said in 1310nm SFP+ module for 6100?:
Most (all?) SFP modules, even high power versions, will not emit anything beyond the class 1 laser rating unless they are seeing incoming signal from the other end. So it should be extremely difficult to actually do any damage. But I'm not about to test that with my eyes.
Back in 2015 i had a lot of issues with "Cisco Clones" in my NEXUS routers.
They "wore out", and the light degraded.They were FINISAIR SM SFP's, and they were emitting light all the time.
You could test them by holding your iPhone Camera up to the SFP in 10 cm distance.If good the "screen exploded" in purple light , if bad there was just a weak light.
I don't know if they have made the newer SFP's more intelligent, as described above.
The issue i can see with the "wait for light from the other end" is ... Who will start to Emit ??
/Bingo
/Bingo -
@bingo600 said in 1310nm SFP+ module for 6100?:
...The issue i can see with the "wait for light from the other end" is ... Who will start to Emit ??
...
My knowledge from setting up numerous SAN FC fabrics:In FC cables light can only be seen if at remote end a component is active and emitts.
This can be a HBA or a switch. As long, as at remote end no active component exists, you cant see anything.
For a SFP it is sufficient to put the SFP into the switch/HBA.
As long as the switch port is not disabled you can see the light in SFP. So plugging in a SFP in a switch (or HBA if HBA is capable of using plug-in SFPs) you will see the light - if device is powered on .
Thats the basic test. Most switches I know provide further information using the management interface, i.e. wavelength, TX/RX power, uptime for switch and SFP, ...So if someone inserts the SFP into the Netgate appliance, you should see a light when using the cell phone cam. Even if it is a multimode SFP I would recommend not to look into the outlets with your eyes.
For the incoming line from ISP you can check also if a light is visible. If not, contact ISP.
Regards
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@nogbadthebad said in 1310nm SFP+ module for 6100?:
@jarhead single mode uses lasers, multi mode uses leds it that simple.
Yeah, figured it would be something like that.
First of all, that's not even true anymore. Most of both types use lasers.
Second, why would it be "that simple"?? Why would a laser be a reason not to use single mode? Makes no sense at all.
I've been working with SM fiber for close to 30 years I would guess and I still have 20/15 vision. Do you know why? Because I don't look at the light with my eyes. Either single or multi. Just don't do it. -
@jarhead said in 1310nm SFP+ module for 6100?:
@nogbadthebad said in 1310nm SFP+ module for 6100?:
@jarhead single mode uses lasers, multi mode uses leds it that simple.
Yeah, figured it would be something like that.
First of all, that's not even true anymore. Most of both types use lasers.
Second, why would it be "that simple"?? Why would a laser be a reason not to use single mode? Makes no sense at all.
I've been working with SM fiber for close to 30 years I would guess and I still have 20/15 vision. Do you know why? Because I don't look at the light with my eyes. Either single or multi. Just don't do it.It's a good rule of thumb.
Always use multimode if you can.
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@nogbadthebad It's not a rule of thumb but good advice for cost only.
My point is, don't tell someone not to use single mode for safety. Tell them not to look at the light for safety.
There's nothing wrong with using single mode.By the way, to the OP, 1310 is not MM as stated earlier. 1300 is MM, 1310 is where it changes to SM.
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I had an installation w. 850m 65my cable (Ooold cable), where we decided to use SM SFP's because it was "Out of spec/length" for MM.
SM were still "Out of spec... 65my" but worked excellent for years.And had a colleague (in '04) that used Cisco ZX'es ($4000/pcs) in a test setup with 10m LC/LC 9my cable ... wo. "optical dampening" in the RX ends.
He blew RX in both ends ... The Boss was NOT happy ....../Bingo
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@bingo600 said in 1310nm SFP+ module for 6100?:
...And had a colleague (in '04) that used Cisco ZX'es ($4000/pcs) in a test setup with 10m LC/LC 9my cable ... wo. "optical dampening" in the RX ends.
He blew RX in both ends ... The Boss was NOT happy ....../Bingo
My guess: this was not related to the cable, but to the TX power of the sending device.
And furthermore, using an SFP with mulitmode and connect a singlemode cable results in funny outcomes.
I have had this seen once in a customer installation, when customer complains that his connections are not stable.
Looking up in DC I saw that they connected SMF cables to MMF devices. No wonder, why connection was not stable!
A MMF device sends the laser in different modes ( (thats why it called multimode!) into the fibre medium. A lot of modes will be lost in a SMF cable.
Vice versa, using a MMF cable with a SMF device will work in most cases.Regards
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We may be getting slightly off-topic here.
Pretty sure the OP isn't going to be using $4K SFP modules or burning anything out!
Steve
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final update - I've tested with both DACs (works fine) and officially supported Intel 850 optics - also works well. I'm currently using the Intel optics since they are supported.
