In the hundreds of 10Gbps ports I look after none of them are hot. Warm maybe but not remotely hot. Then again there is not a 10GBaseT SFP+ in sight. It is almost all DAC cables with a couple dozen SR optics and a single BX optic

The 40Gbps ports don't seem to get hot either, a mixture of DAC and SR optics.

In reply to a post by jabuzzard:

In the hundreds of 10Gbps ports I look after none of them are hot. Warm maybe but not remotely hot. Then again there is not a 10GBaseT SFP+ in sight. It is almost all DAC cables with a couple dozen SR optics and a single BX optic

The 40Gbps ports don't seem to get hot either, a mixture of DAC and SR optics.

I don't and have never gotten to choose what is connected to my networks so have to handle various scenarios. I don't get to tell internal or external customers what they may plug in and how; I provide them switch ports and connectivity. Yes, this does mean some 10GBase-T, and they do get hot.

As far as SR optics go across even relatively short metro networks 3-400m doesn't really cut it.

We make extensive use of BX optics at ranges up to 30km, too. Given dark fibre even from relatively cheap providers is on the order of £300 / month it's at something of a premium.

In an ideal world, I can't speak for anyone else just me here, I'd not ever have to use 10GBase-T, I'd have abundant fibre or abundant space, cooling, power and cash for transmission equipment so no need for BiDi, or I'd hand over the WAN to someone else so that it's someone else's problem.

Sadly the world isn't ideal. We work within a budget while preserving uptime and quality and do it well.

EDIT: Information in earlier version that shouldn't have been - removed.

Edited by XGS_Is_On (Sat 21-May-22 22:41:54)

In reply to a post by roundrobin:

Hi,

I'm looking to move to their 3Gbps tarrif this summer. Looking at the Zyxel router they provide , it seems to have an "SFP+ cage". I'm wondering do they supply an XGS-PON module for this which I can then plug into my own network equipment rather than use their router. I know it's a bit of a niche product but maybe someone out there has experience with it.

Cheers

I have the 3Gb service and you can plug your own device into the XGS-PON module. Community Fiber provides an SFP+ 10G-T module for both the modem and Zyxel router.

In reply to a post by jon999:

I have the 3Gb service and you can plug your own device into the XGS-PON module. Community Fiber provides an SFP+ 10G-T module for both the modem and Zyxel router.

So you're saying they supplied you with a separate ONT (e.g. Adtran) and router?

And the router uses a copper SFP+ module to connect to the OLT's RJ45 port?

This is perfect. Thanks so much

That's correct they supplied an Adtran SDX 602x, which is different to what is provided with the 1Gb service, and the router is Zyxel AX7501-B0.

The Adtran connects to the Zyxel via 2 SFP+ 10G T modules, however you can connect directly to the Adtran.

The service is very good. I've only had a couple of issues - once with a faulty Zyxel router, and the other day there was an outage for a 2-3 hours but that's only happened once in 8 months.

Edited by jon999 (Mon 23-May-22 13:37:59)

In reply to a post by jon999:

The Adtran connects to the Zyxel via 2 SFP+ 10G T modules

Ah, so that model of Adtran has an SFP+ for the user-side connection.

If it were me, I'd be pulling out both 10G-T modules and replacing them with an SFP+ direct attach cable.

I had exactly the same idea. Although the direct cables I had around didn't work. Would be interested to know if you are able to get it working.

I have DAC cables working in data centre environments. Unfortunately I'm not in the footprint of Community Fibre.

One case where SFP+ fibre modules work, but not DACs, is the Mikrotik RB4011:
https://mikrotik.com/product/rb4011igs_rm ("Note: Passive DAC ... are not supported")
https://wiki.mikrotik.com/wiki/MikroTik_wired_interf...

The implication is that unfortunately there is *some* chipset out there which isn't capable of it

In reply to a post by jon999:

I have the 3Gb service and you can plug your own device into the XGS-PON module. Community Fiber provides an SFP+ 10G-T module for both the modem and Zyxel router.

He's looking to plug the module into his own kit, not have a separate modem/ONU.

I'm not actually clear what you're saying here as you've implied above that a customer can plug the XGSPON SFP into their own device, but below said you've the 3G service and use a separate ONU and the Zyxel acting as a router only.

Appreciate it's probably me being thick but for the sake of my stupidity please could you confirm you've plugged the XGSPON SFP into your own equipment and it worked.