> it's intended to be preterminated SFP-to-SFP

I wonder why nobody's making field-terminatable DACs for custom lengths. If you've torn one down, they're not exactly complicated inside.

If they existed, would people buy them?

▲

zamadatix 8 minutes ago | parent | next [-]

I think the only reason RJ45 termination is an (occasional) thing for short patching is you're also in spec to go 100 meters with it so the tools and materials to do so are already commonly in use.

For passive DACs the range of lengths is so low you can just get away with having 2 or 3 different lengths on hand and never need to worry about it. Active DACs start to be too much to bother with again.

Fiber it's possible, but again really only because you can go kilometers with it rather than because people want to make short patch cables themselves.

▲

Filligree an hour ago | parent | prev | next [-]

Doesn't that reduce to RJ45?

	▲	mwpmaybe an hour ago \| parent [-]
		No. It's twin-axial. Think coaxial, but more axial.

▲

jeffrallen 2 hours ago | parent | prev [-]

Nope. For production, you want to reduce risk and variation. DACs are already available in about 5 sizes up to the max 7m length, why would you terminate any other size in the field?

	▲	iso1631 35 minutes ago \| parent [-]
		I did spec a couple of 7m dacs a few months ago to run between two adjacent bays, but normally for more than 2m I'll just drop a SM sfp and run a preterminated fibre cable. In the field its the armoured fibre on a reel, 100m, 200m, 500m etc, with opticon connectors, or some normal cat5 typically for APs