| General > General Technical Chat |
| Ethernet as System Comm Link |
| << < (4/5) > >> |
| Cerebus:
--- Quote from: fourfathom on March 06, 2022, 03:31:18 pm ---..., Plesiochronous Networks, Metastability, and Clock Synthesis... --- End quote --- AKA how to cross between two clock domains that are half a country apart. And the guys trying to do it inside the same FPGA think they have problems. :) |
| fourfathom:
--- Quote from: Cerebus on March 06, 2022, 03:47:29 pm --- --- Quote from: fourfathom on March 06, 2022, 03:31:18 pm ---..., Plesiochronous Networks, Metastability, and Clock Synthesis... --- End quote --- AKA how to cross between two clock domains that are half a country apart. And the guys trying to do it inside the same FPGA think they have problems. :) --- End quote --- Yep, those FPGA wimps don't have to deal with diurnal phase variation, do they? |
| fourfathom:
--- Quote from: mansaxel on March 06, 2022, 03:46:35 pm ---On timing, as you write; if we can hold packet delay variation well below the timeout value for various control function timeouts, we're good. And the extra energy spent in teaching the control program to accept data when it arrives, and not to crash/hang if it does not arrive exactly when it should (according to the TDM clock), is well invested, because it makes the control system resilient. --- End quote --- Yes. And again, delay and jitter requirements in the control plane are orders of magnitude more relaxed than in the network data links. I've been out of that loop for a long time, but I suppose in many cases now the separate "box management" control plane has evolved to being just a custom LAN within the much larger WAN. At least that's how I would approach it (absent stuff I don't know about). I like simplicity and uniformity. Well I am gratified that my hunch about using switched ethernet seems to have been validated. I've always thought I was right, and I had heard of this method being used elsewhere, but until now have never brought it up among my peers. |
| Cerebus:
--- Quote from: dunkemhigh on March 06, 2022, 05:28:45 pm --- --- Quote ---You might think you're on here to "win points" but I'm most certainly not --- End quote --- <splutter!> --- End quote --- So you're trying to say your participation in this thread is pointless are you? I quite agree. Knock it off will you, that's is a completely pointless interjection, designed to generate heat, not shed light. |
| Cerebus:
--- Quote from: dunkemhigh on March 06, 2022, 07:27:53 pm --- --- Quote from: Cerebus on March 06, 2022, 06:03:42 pm --- --- Quote from: dunkemhigh on March 06, 2022, 05:28:45 pm --- --- Quote ---You might think you're on here to "win points" but I'm most certainly not --- End quote --- <splutter!> --- End quote --- So you're trying to say your participation in this thread is pointless are you? I quite agree. Knock it off will you, that's is a completely pointless interjection, designed to generate heat, not shed light. --- End quote --- Mote, eye. Pot, kettle. Maybe if you hadn't come out trying to put down Benta there would be no heat, just light, and you wouldn't have to resort to faking my words to justify yourself either. Perhaps you should tone it down and, ah, knock it off. Or will you? --- End quote --- No I'll just do what I should have done in the first place, ignore you. |
| Navigation |
| Message Index |
| Next page |
| Previous page |