On Tue, Apr 16, 2024 at 10:46:57AM -0700, Johnathan Mantey wrote: > I agree with Russell.
I agree with Russell as well, which is why I tried my 8 pin low speed scan-the-LEDs cable tester /first/, end to end, from the cable end near the ONT, through perhaps-too-many 8 pin plugs and sockets and cable segments, to the switch. All the half-second pulses match in sequence and polarity. I do the wiring, not the installers. That said, the Ziply installers seem to be capable and informed professionals, unlike other klutzy cable crews I could name. What I don't have (yet) is a way to test signal propagation IMPEDANCE continuity. If some of the twisted pair segments in my house cabling behave like 75 ohm impedance, and others like 50 ohm impedance (for example), then a 10 meter run will behave like a 30 MHz resonator, and eat multilevel or 20 nanosecond pulses. So, I get 90 Mbps rather than the 330 Mbps the Ziply tech measured direct from the ONT. With HIS two meter cable, which performed better than my cables (Happy Family Mixed Vegetable brand, from darkest China, via Pat Heiden). Time to kludge up a TDR (time domain reflectometer). As is, 90/90 is far better than the 40/6 I pay ComCANT for. When I replace the Comcast POTS phone line with an OOMA, I will cancel Comcast service and use the cable modems as flamethrower targets. That phone line is used for a fax; it works inbound but not outbound (yet). And yes, there are internet fax services, but not many affordable and medical-practice-privacy-approved services. OOMA is free forever, after purchasing the interface box. I will get around to improving house-internal signal rates while dealing with many other urgent concerns - such as upgrading too many ancient Red Hat machines to Debian, learning why Debian Bookworm displays screen tears on my ancient but superbly ergonomic T60 Thinkpads, clear the backyard of log rounds from six fallen trees, then fixing the fence they crushed with boards cut from those logs (arboreal justice!). Plus dozens more tasks plaguing my placid passivity. Life is one damned thing after another, followed by zero things forever. And now, if you all will excuse me, I have things to do. Keith L. -- Keith Lofstrom [email protected]
