>> The telephone companies tend to be very aware of time and timing. The >> time division multiplexing of T1 and T3 lines requires splitting the >> second very precisely. Cellular phones also require very precise > >That can be true of the public network, although even then it may >be more so for the more engineering oriented layers, like bearer >synchronisation, than the more commercial oriented layers, like >call detail recording. > >However, it is very definitely not true of most PABX systems, which >typically have wristwatch and eyeball set times and run in local >time, with no automatic daylight saving switch, and have no high quality >frequency standard.
There are two separate issues: time and frequency. Anybody know if I can get a good frequency off a DSL line? Assume I'm willing to hack a wire into my modem/router. If so, it might be a nice/cheap way to get a stable clock to use with a NTP box. (Handwave, PLLs and such. Not a hard problem.) -- The suespammers.org mail server is located in California. So are all my other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited commercial e-mail to my suespammers.org address or any of my other addresses. These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
