Path: utzoo!attcan!uunet!zaphod.mps.ohio-state.edu!casbah.acns.nwu.edu!accuvax.nwu.edu!nucsrl!telecom-request From: julian%bongo.UUCP@nosc.mil (Julian Macassey) Newsgroups: comp.dcom.telecom Subject: Re: Touch-Tone Specifications (Swedish Phones) Message-ID: <15993@accuvax.nwu.edu> Date: 11 Jan 91 15:16:00 GMT Sender: news@accuvax.nwu.edu Reply-To: Julian Macassey Organization: Tired Insomniacs Assn Hollywood California U.S.A. Lines: 49 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 27, Message 3 of 7 In article <15893@accuvax.nwu.edu> hpa@casbah.acns.nwu.edu (Peter Anvin) writes: X-Telecom-Digest: Volume 11, Issue 17, Message 4 of 9 >In article <15804@accuvax.nwu.edu> Kari Hardarson unc.edu> writes: >>I'm particularly concerned with whether the touch-tone features on a >>phone bought in USA will work in Scandinavia - or whether >>the phone will work at all for that matter. >3. Swedish touch-tone phones have 13 buttons, "0".."9", "*", "#", "R". I > don't know what the "R" button does, but its functions are similar to > the ones U.S. phone companies flash the hook for, so it might be exactly > what it does. The "R" is the "Recall" button and is usually a ground button used to signal a PBX or CO. It is used only for feature control and is not needed for POTS service. >4. The Swedish phone net provides a lower current level than any other > phone system in the world. Thus, a current-hungry foreign phone may not > work properly. It shouldn't matter for modern electronic ones. The Swedish minimum line current is 12 mA, The U.S. (Bell) spec is 20 mA. But your standard 2500 (AT&T Desk Phone) set will work pretty well down to 14 mA. Cheap and nasty imported phones may not work on Swedish line current, they don't do too well on U.S. line current either. >5. Get a phone that supports all four RJ-11 wires (including black/yellow). > Swedish Televerket warns that a "pirate" (non-compliant) telephone may > not hang up properly, running up your bill long after you hung up. See 3 above re the R button. But the kicker here is, phones sold in the U.S. neither connect nor use the second pair (Black/Yellow). So this is difficult or impossible to do. U.S. Phones using both pairs are either two line phones or have A1 lead control. Some old phones also used the yellow wire as a ground wire for grounded ringing. But none of those U.S. scenarios will fit the CCITT R button. More correctly, a U.S. phone will work fine, but not have the recall button unless you wire it in yourself. I do not see how that can affect the call hanging up. Hanging up the phone disconnects Tip and Ring and stops current flow. Julian Macassey, n6are julian@bongo.info.com ucla-an!denwa!bongo!julian N6ARE@N6YN (Packet Radio) n6are.ampr.org [44.16.0.81] voice (213) 653-4495