Hi All, > If you look at advisory notes ( document EG 201 121: a guide to application > of TBR21), there is one specific for Germany (DE 09) where they recommend > to meet the 14 dB return loss during DTMF dialling between 600 Hz and 1700 > Hz. > The advisory notes are not mandatory but if you don't do, you have to > mention on the PSTN compatibility declaration ( as stated in CTR21) that > your product might have problems working on the German PSTN. > Nothing to do with V90. > The Advisory Notes have no standing in the CTR, the only declaration that the applicant has to make is that they are aware of them.
Because of this, there is no need to mention this incompatibility unless it can be overcome with switch or software settings. Best Regards Gary Gorton Senior Telecommunications Engineer --------------------------------------------------- TUV Product Service 12, Marshall Road Hillmead, Swindon Wiltshire UK SN5 9FZ T. +44-(0)1793-871990 F. +44-(0)1793-872990 W. http://www.tuvps.co.uk ---------------------------------------------------
