In a message dated 4/19/2002, you write:
> My "summarized" Analogue Modem Requirements > TBR21 + EG 201 121 (Europe) > FCC Pt 68 (Mexico and Canada acceptance?) > TS002 (Australasia, no PTC 200?) > Hi Alex: As Ron Pickard has already pointed out, Mexico's telecom requirements are not fully harmonized with FCC Part 68, so there is a separate test and approval process for Mexico. I just wanted to add a couple comments about other aspects of your proposed plan: 1) As you know, TBR 21 and EG 201 121 are strictly voluntary, so if you are seeking to cut testing costs this is something you should look at. If you have good confidence in your modem design and you do not expect your customers to insist on this testing, it is an avoidable expense. I typically perform internal testing for those parts of TBR 21 and EG 201 121 that are relevant, but the formal testing at an outside lab is now of questionable value. 2) You use the term "Australasia" in reference to TS 002. Some people use this term to refer to Australia and the entire Asian region. Please keep in mind that a TS 002 report will only get you approval in Australia. Other countries, such as New Zealand, China, Taiwan, and Singapore each have their own requirements that are not identical to TS 002. Fortunately, there is considerable overlap in the requirements of the different countries, so a carefully designed modem can meet the requirements of all these countries. Other than a few software-controlled characteristics related to dialing and such, the only hardware related parameter where there is a conflict is return loss (Australia and Singapore can not both be addressed with a single compromise impedance). 3) It's not clear whether your plan for worldwide approvals implies that you have a single, worldwide modem design, but you may want to give some thought to how you will address the various worldwide requirements. With some advance planning it is possible to have a single design that can be used worldwide, but without such planning you will likely be forced to have multiple versions of your modem. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 http://www.randolph-telecom.com
