Re: German Return Loss, V.90 The great thing about CTRs is that you can get your approval from pretty well anywhere with the appropriate notified body. There should be no problem in getting a V90 modem assessed in any of the major labs to CTR21, provided it is designed to meet the requirements. Of course a V90 modem with a marginal return loss may not work very well ..........
Regards to all Ted Warren Global Telecom Labs Shane Patterson wrote: > > At 11:25 PM 9/29/98 -0500, you wrote: > >Hello esteemed colleagues: > > > >I have a customer insisting that Germany has a requirement for 14dB Return > Loss for non-voice telephony analogue terminal equipment in spite of the > recent passing of CTR 21. This particular case is a V.90 (56K) modem. I > figure either: > > > >1) they don't know what they are talking about (as CTR 21 is a CTR and it > specifies 8dB from 300Hz to 4kHz, and 6 dB from 200 Hz to 300Hz) or > > > >2) I don't know what I am talking about, or > > > >3) this is something particular to V.90 (56K) modem requirements that is > not harmonized that I don't know about. Is 14dB required for 56K? And if > so, is it an industry standard or a legal standard? > > > >Any thoughts on this matter? > > > > Hi, > > The final CTR21 adoption is great, but now we go through the fun transition > period, during this period there are still reasons that some people may > want country specific vs. CTR21 approval. > > - Their product may not be able to meet the current limiting requirement of > CTR21 yet > - Their customer may want German Specific approval > - They may not know about CTR21 ( ??? ) > > Insofar as the 14dB limit I have not reviewed German specs lately so I > can't comment specifcally on that. > > Just my thoughts, > > Shane Patterson > Telcom Research > www.telcomresearch.com
