Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!execu!sequoia!texbell!vector!telecom-gateway From: OLE@csli.stanford.edu (Ole J. Jacobsen) Newsgroups: comp.dcom.telecom Subject: Dial pad arrangements Message-ID: Date: 4 Aug 89 15:34:51 GMT Sender: news@vector.Dallas.TX.US Lines: 105 Approved: telecom-request@vector.dallas.tx.us X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@vector.dallas.tx.us X-TELECOM-Digest: volume 9, issue 274, message 2 of 5 The recent discussion brought back memories of my first message to this list almost 6 years ago, I have enclosed it verbatim (I am still real proud of those diagrams!): Date: 15 Nov 83 12:55:44+0100 (Tue) >From: ole@nta-vax (Ole Jorgen Jacobsen) To: TELECOM@ECLC Subject: Dialling arrangements etc. Hello friends in the telephone world, I only just subsrcibed to this list and while reading through the the archives I noticed a couple of questions relating to dialling arrangements which I will answer herein. First of all "Telegrafverket" is the old name for the Norwegian Telco, now called "Televerket". Don Lynns phone was made by EB which is Elektrisk Bureau an LM Ericsson sister company in Norway. The dial is the "Oslo" or "X" dial as explained below. EB now make our new fancy Tastafones which are "Touch Tone Compatible". On the subject of dials: There are (at least) 3 types of dials in use worldwide: o The "Z" dial is the most common (Internationally) and it looks like this: (4) (3) (5) (2) (6) (1) Pulses correspond to digits (7) (10 pulses for 0) (8) \\ (9) (0) o Next comes the peculiar "Oslo" or "X" dial: (Also used in New Zealand?) (6) (7) (5) (8) Still 10 pulses for 0 but (4) (9) the rest is inverted (3) (2) \\ (1) (0) The Oslo dial is only used within the city itself, we are 10 miles out of Oslo and have the Z dial, it is apparently too expensive to re-strap the old exchanges so we are stuck with the two incompatible phone types until it all dies and goes TT/digital. o Finally, in Sweden the shifted "Y" dial is used: (3) (2) (4) (1) (5) (0) Similar to the "Z", but (6) shifted so that 0 gives (7) \\ one pulse and 9 gives ten. (8) (9) I am not sure what the basis of all this is, but can only assume "Historical Reasons". Just before the new Tastafones went into production here a couple of years ago, it was decided to have the keypad layout DIFFERENT to your favorite Ma Bell. The reason is apparently that people familiar with calculators should not have to re- program their hands when shifting to the new phones, I guess it makes sense, but it is still a bit wierd. The keys still give the same DTMFs of course so that our phones would work on your system and vise versa. 7 8 9 1 2 3 4 5 6 4 5 6 1 2 3 7 8 9 0 * # * 0 # Our keypad Your keypad Enjoy International Standards! Ole J Jacobsen Norwegian Telecommunications Administration Research Establishment N-2007 Kjeller Norway +47 2 73 91 75 ole@NTA-VAX <370> -------