- __techs (2:5015/42) ----------------------------------------------- __techs - Msg : 508 of 1000 Scn From : Mike Telis 2:5020/98.3 06 Oct 97 17:15:28 To : Alexander Kryzhanovsky 07 Oct 97 02:57:44 Subj : I want answers! ------------------------------------------------------------------------------- @AREA:SU.INPRO Hello Alexander! Saturday October 04 1997 16:04, Alexander Kryzhanovsky wrote to Mike Telis: MT>> Because you did not disable MNP! The modem will fallback to MT>> MNP if V.42 handshake failed. AK> ��, ��� ����������� �� MNP ��-�� ������� ��������� V42 - ��� �������. AK> ������ � ���, ������ �������� V42 ����������� ��������? ��� ������ ����� AK> �����, � V3* ������������, � � V42 �� ������? ��� ��������� � ��������� - AK> ����� IDC �� � ������ ������� ������ � ������ �� ����� - ���� �� AK> ������������ � V3*, �� � V4* �������������� 100%. ���� ������ ������ - AK> ����� ��� ����� ����, �� ����� ��� ���������� ������... ��� ����� � AK> ��������, ��� ��� ������� IDC � V42 ? Well, the modem does not analyze V.42 bit in V.8 capabilities frame (because some modems do not set this bit). V.42 handshake in V.34 mode is accomplished via traditional ODP/ADP and SABME. Therefore, LAP-M handshake may fail due to line noise or inappropriate speed selection (the modem may select too fast rate and fallback later, quite in time to negotiate MNP-4). MT>> Rx level is a way too high! See, the modem's designed in MT>> assumption that line loss would be at least 12 dB. On a line MT>> like that, it's neccessary to adjust rx cd treshold (didn't I MT>> netmail you how to do that?). AK> No, You're didn't. I asked, but... Check in your netmail folder. AK> ����, �� �������� ����� ����� ������������� ������, ��� � ��� �� � AK> �������, ��� � *���� ���������� �������* ������� �������� � ������� IDC AK> ����� ��������� ����������. � ���� ������ ������ ������������� ��������� AK> AT&T ������ � ���� ����������� - brightcom �� �����, � IDC �����. H� � AK> ���� �� � ���� ����, ����� ������� ��� ��-�� ����, ��� brightcom AK> ����� ���������� � �� ������� � *�����* ��������, ������ ��� �� ����� ���� AK> �� ���������� �����. H� ���� ��� �� ���! ��� ���� ���� ������ � ���� AK> ������ ������ - IDC *�� ������� �����* c RX ~-20-30 (��������� 10-20 db) -20 ... -30 dB is what we call optimal rx level. Sometimes you're getting -45dB where modems like Brightcom fail to handshake. See, no one promised you that IDC modem would be superior on all lines and connections. On some lines you may get a better result using a different brand (fortunately we provide with moneyback). Most occassions, people are getting better results using IDC modems but not always! AK> *H�* �������� ������ �� =< 28800. ������� ������ �������� ��������. Look, if you always getting > 28800 bps connections, probably you wasted money buying IDC modem. The modem's designed for bad telephone lines which dominate in this country. > Mike --- GoldED 2.40.P0720+ * Origin: Explorer (FidoNet 2:5020/98.3)
