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Dtd linking

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Dtd linking

I have a question about the dtd linking. If you have a dtd link between a 2.4G and 5G nodes, does this link act as a store and forward just like an rf link or is it more like a repeater?


WU2S's picture
DtD link

It acts as a wired Ethernet cable link between the two nodes, similar to two devices wired into a router.

AE6XE's picture
Also,  think of the mesh

Also,  think of the mesh 'node' as a traffic router, like a router on the Internet.  But it has RF and cat5 links instead of fibre cables.   The traffic is data packets going from, e.g. laptops to a website and back, across the mesh network and through many mesh notes or routers.    A user wouldn't want any delay (store and forward) type of capability, rather you want the computer on the other end to be able to respond very quickly (msec).   There is such a thing on the internet as caching information in the network to be more efficient, a type of store.   But we don't do this today on the mesh.

As a routing device a packet

As a routing device a packet arrives (via RF or Tunnel) is fully received (stored), is checked to make sure it is not corrupt (it matches the checksums) and is then sent back out (forwarded) via RF, DTDLink, or tunnel.

All this happens very quickly (miliseconds) but it is a store and forward just like RF. (RF Does do a bit more storing however as it attempts to verify packet delivery with a WIFI ACK while Ethernet oneshots it out the port and lets TCP/IP handle any issues if the packet some how gets lost which is unlikely on a good quality Ethernet link)

Thanks that answers my

Thanks that answers my question.

K6AH's picture
What's a "packet"?

A packet is a maximum of 1500 bytes, so it is not necessarily the entire message.

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