ISP Information:
In Windows NT and 2000 networking, this machine is the main machine that responds to security authentication requests, such as logging in, within its domain. The PDC may be backed by one or more backup domain controllers that can also handle security authentication.
ISP Glossary:
Primary Domain Controller - haynes@alumni.uark.edu (Jim Haynes) wrote in messagenews:: In my youth one of my telephone company friends sometimes went out to a customer site to work on the Teletype. I never saw the site or the equipment, but some of the stuff he took with him included a couple of vacuum tubes, commercial types 35L6 and 50Y6. I've always wondered what the equipment was and what the tubes had to do with it. Anybody know? jhhaynes at earthlink dot netGoing back almost 4 decades, I recall a teletype method called"Selective Signaling" which allows the equivalent of multidropmachines on a private line circuit. It was fairly popular with lawenforcement as I recall. The tubes (I'm guessing here, no first handknowledge) may have performed the dicriminator function (think of FMdiscriminators) of station identification on the private line?Speaking of vintage equipment, you might want to check out: "TheVintage Telephone Equipment Museum, now known as The Museum ofCommunications, is sponsored by Charles B. Hopkins Chapter 30,TelecommPioneers. We are located at 7000 East Marginal Way South,Seattle, Washington, 98108. The museum can be reached on (206)767-3012 and is open every Tuesday from 8:30 a.m. to 2:00 p.m. and byappointment other days." From my visit there, I remember tons ofdata (teletype models from 15 and earlier) equipment. The folks therekeep it operational and thus would have the final word on this.http://www.scn.org/tech/telmuseum/ or contact them by email at:telmus@scn.orgIf you find yourself in the Seattle someday with some time to spareand want to visit a true gem, go down by Boeing field and pay them avisit. I can't wait to go back and talk to some of the switchmen whostill keep an old Panel office from Mercer Island running!Jack
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