I was looking and the various combinations and mapping them.. JL = 55x YL = 95x JP = 57x YP = 97x YJ = 95x YK = 95x JS = 57x YS = 97x YR = 97x JK = 55x KR = 57x
These NXX prefix's all map out to routing prefix's that have always been "special" like 555 for numbers in movies... because they were special routing if at all... in any case they all are on 3 buttons of the keypad... so the combinations were what you could do with those key codes... ( or dial codes back then :-) ) Doug KD8B At 10:29 PM 8/26/2009, you wrote: > > >Well, there, that explains it as good as can be. I recall the days when our >phone number started with PL3 (for 753 exchange) and the PL stood for >PLeasant. > >Chuck >WB2EDV > >----- Original Message ----- >From: "William Becks" <<mailto:wbecks%40centurytel.net>wbe...@centurytel.net> >To: ><<mailto:Repeater-Builder%40yahoogroups.com>Repeater-Builder@yahoogroups.com> >Sent: Wednesday, August 26, 2009 10:09 PM >Subject: Re: [Repeater-Builder] IMTS Channel Designators > > > Folks, > > > > A reasonable explanation can be found at URL: > > > <http://www.privateline.com/TelephoneHistory3A/mobile.html>http://www.privateline.com/TelephoneHistory3A/mobile.html > > on how the Bell > > System used the two-letter Channel Designators as a prefix to the original > > MTS 5-digit mobile phone numbers. Later, when IMTS replaced the MTS > > system, > > Bell went to a seven digit dialing plan with the first three digits being > > the NPA (Area Code) for the mobile telephone registry. > > > > Bill, WA8WG > > > > > > ----- Original Message ----- > > From: "Eric Lemmon" <<mailto:wb6fly%40verizon.net>wb6...@verizon.net> > > To: > <<mailto:Repeater-Builder%40yahoogroups.com>Repeater-Builder@yahoogroups.com> > > Sent: Wednesday, August 26, 2009 8:31 PM > > Subject: RE: [Repeater-Builder] IMTS Channel Designators > > > > > >> Jesse, > >> > >> Actually, those are MTS channel designations; the IMTS came several years > >> after MTS was deployed. The eleven "Y" and "J" channels were in the > >> 152-158 > >> MHz VHF band, while there were also ten "Z" channels in the 35-43 MHz Low > >> band, and six "Q" channels in the 454-459 MHz UHF band. The low-band > >> channels had an 8 MHz split, VHF channels had a 5.26 MHz split, and UHF > >> channels had a 5 MHz split. The oddball VHF channels were later used for > >> taxicabs. I am currently using two of those VHF channels in commercial > >> repeater service, taking advantage of the small additional separation. > >> > >> Back in 1968, I put a two-channel GE Pacer (gasp!) with a Secode > >> mechanical > >> selector attached, in MTS service back in Rantoul, Illinois. Not too > >> many > >> folks in that part of Illinois had mobile telephones back then, and even > >> fewer had a kluge like a Pacer. Despite its appearance, it worked quite > >> well, and I learned to anticipate when the phone would ring by counting > >> the > >> clicks as the Secode unit stepped. > >> > >> I, too, would like to know the origin of the two-letter channel > >> designators. > >> > >> 73, Eric Lemmon WB6FLY > >> > >> > >> -----Original Message----- > >> From: > <mailto:Repeater-Builder%40yahoogroups.com>Repeater-Builder@yahoogroups.com > >> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jesse Lloyd > >> Sent: Wednesday, August 26, 2009 5:32 PM > >> To: > <mailto:Repeater-Builder%40yahoogroups.com>Repeater-Builder@yahoogroups.com > >> Subject: [Repeater-Builder] IMTS Channel Designators > >> > >> > >> > >> Hey All, > >> > >> I was having a discussion with a fellow tech and the topic of IMTS came > >> up. > >> Does anyone here remember the reason for the strange channel designators? > >> JL YL JP YP YJ YK JS YS YR JK KR ? Why YL... why not channel B or Ch 2, > >> they > >> must mean something... > >> > >> > >> Jesse > >> > >> > >> > >> ------------------------------------ > >> > >> > >> > >> Yahoo! Groups Links > >> > >> > >> > > > > > > > > ------------------------------------ > > > > > > > > Yahoo! Groups Links > > > > > > > >
