There is one 14 dB return loss requirement in BAPT223ZV5. Return loss must be equal or better than 14 dB during DTMF dial between 600Hz and 1700Hz (2.5.2).
Ofcourse you can use TBR21 where there is not such a requirement. > -----Original Message----- > From: [email protected] [mailto:[email protected]]On > Behalf Of Mel Pedersen > Sent: woensdag 30 september 1998 6:25 > To: 'TREG' > Subject: German Return Loss, V.90 > > > 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? > > I thank you all in advance for your assistance. > > Mel Pedersen Midcom, Inc. > Homologations Engineer Phone: (605) 882-8535 > [email protected] Fax: (605) 882-8633 >
