Jeongmin wrote:
> Hello TREG'ers, > > > 1. I'm trying to make up a listing of the PSTN requirements > for all the countries. > > It's gonna be like this : > > --------------------------------------------- > UK : NTR3, TBR21 > Switzerland : TBR21 > Germany : BAPT223 ZV 5 > Sweden : TBR21 > Denmark : TBR21 > Europe : TBR21 > USA : FCC Part 68 > Canada : CS-03 > Australia : TS 002 > New Zealand : PTC 102, PTC 200 > Singapore : PSTN 1 > Japan : JATE Blue Book > Korea : KICS.KO-05.0014/R1 > Hongkong : CR01 > South Africa : DPT-TE-018,002,003,004,005,006,007,015 > --------------------------------------------- > > > But, I don't know PSTN requirements for following countries. > > --------------------------------------------- > China : > Russia : > Uzbekistan : > Taiwan : > Iran : > Lebanon : > India : > Indonesia : > Brazil : > Argentina : > Mexico : > --------------------------------------------- > Please check >> http://www.icc-uk.com << ICC has compiled information on most of the countries you are referring to and make that available in manuals, at a price. They also have annual Approvals seminars where experts from different parts of the world explain those things that are not immediately obvious from and in the regulations. Collecting and maintaining an accurate data base on the information you are looking for is a very costly undertaking that only very large multinationalsand some specialized consulting agencies can afford. Management would not appreciate if that investment were to be given away by their employees. May I suggest you attend the 10th Annual Global Approvals Conference in London, October 14, 15 & 16, 1998. The WEBsite given above will provide information. > 2. Which is more likely to interwork properly with the Chinese analog PSTN, modem designed for UK or US ? 3. Which countries are able to use the US modem ? UK : no Switzerland : Germany : Sweden : Denmark : Europe : Europe is a region that covers many of the countries you have listed USA : yes Canada : YES Australia : New Zealand : Singapore : Japan : yes Korea : yes Hongkong : South Africa : China : Russia : yes Uzbekistan : Taiwan : Iran : Lebanon : India : Indonesia : Brazil : Argentina : Mexico : Depends ---------------------------------------------- 4. What is a meaning for the following modem parameters ? return loss : modem impedance : transmit level : dtmf tone levels : ring frequency and cadence and amplitude : out-of-band signal : DC V-I : ring detect voltage thresholds : pulse break/make ratios : auto-redial limitations : Perhaps there are courses in basic telephony that cover the width of these questions. Maybe there is a market for it. I can answer each one of these but not over the TREG and not for free. How can I set this parameters for modem ? ------------------------------------------------------------- Vic Boersma
