Modemsite Forum56 - The Modem Bulletin Board

Forums | USR | Help to diagnose my connection problems

Watch

Author	Topic
DeanD Tl Posts: 2	Posted - 9/3/2001 3:20:51 PM 09-03-2001 16:40:58.48 - U.S. Robotics 56K FAX INT in use. 09-03-2001 16:40:58.49 - Modem type: U.S. Robotics 56K FAX INT 09-03-2001 16:40:58.49 - Modem inf path: 3COMCO~1.INF 09-03-2001 16:40:58.49 - Modem inf section: ModemPCMin 09-03-2001 16:40:58.72 - 115200,N,8,1 09-03-2001 16:40:58.72 - 115200,N,8,1 09-03-2001 16:40:58.72 - Initializing modem. 09-03-2001 16:40:58.72 - Send: AT<cr> 09-03-2001 16:40:58.72 - Recv: AT<cr> 09-03-2001 16:40:58.84 - Recv: <cr><lf>OK<cr><lf> 09-03-2001 16:40:58.84 - Interpreted response: Ok 09-03-2001 16:40:58.84 - Send: AT&F1E0Q0V1&C1&D2S0=0<cr> 09-03-2001 16:40:58.84 - Recv: AT&F1E0Q0V1&C1&D2S0=0<cr> 09-03-2001 16:40:58.97 - Recv: <cr><lf>OK<cr><lf> 09-03-2001 16:40:58.97 - Interpreted response: Ok 09-03-2001 16:40:58.97 - Send: ATS7=255S19=0L0M1&M5&K1&H1&R2&I0B0X4<cr> 09-03-2001 16:40:59.10 - Recv: <cr><lf>OK<cr><lf> 09-03-2001 16:40:59.10 - Interpreted response: Ok 09-03-2001 16:40:59.10 - Send: ATM0S32=66<cr> 09-03-2001 16:40:59.22 - Recv: <cr><lf>OK<cr><lf> 09-03-2001 16:40:59.22 - Interpreted response: Ok 09-03-2001 16:40:59.23 - Dialing. 09-03-2001 16:40:59.23 - Send: ATDT;<cr> 09-03-2001 16:41:00.96 - Recv: <cr><lf>OK<cr><lf> 09-03-2001 16:41:00.96 - Interpreted response: Ok 09-03-2001 16:41:00.96 - Dialing. 09-03-2001 16:41:00.96 - Send: ATDT*##,##########<cr> 09-03-2001 16:41:18.75 - Recv: <cr><lf>CONNECT 31200/ARQ/V34/LAPM/V42BIS<cr><lf> 09-03-2001 16:41:18.75 - Interpreted response: Connect 09-03-2001 16:41:18.75 - Connection established at 31200bps. 09-03-2001 16:41:18.75 - Error-control on. 09-03-2001 16:41:18.75 - Data compression on. above is from the connection log but not for the one below i don't think. I usually don't use that extra init, usually just use AT&F1M0 ati6i11 U.S. Robotics 56K FAX INT Link Diagnostics... Chars sent 24037 Chars Received 237409 Chars lost 0 Octets sent 14438 Octets Received 90921 Blocks sent 753 Blocks Received 888 Blocks resent 161 Retrains Requested 2 Retrains Granted 2 Line Reversals 0 Blers 58 Link Timeouts 30 Link Naks 15 Data Compression V42BIS 2048/32 Equalization Long Fallback Enabled Protocol LAPM Speed 16800/21600 Last Call 00:14:24 Disconnect Reason is Unable to Retrain U.S. Robotics 56K FAX INT Link Diagnostics... Modulation V.34 Carrier Freq (Hz) 1959/1959 Symbol Rate 3429/3429 Trellis Code 64S-4D/64S-4D Nonlinear Encoding ON/ON Precoding ON/ON Shaping OFF/ON Preemphasis (-dB) 6/0 Recv/Xmit Level (-dBm) 15/12 Near Echo Loss (dB) 23 Far Echo Loss (dB) 53 Carrier Offset (Hz) 4662 Round Trip Delay (msec) 4 Timing Offset (ppm) 6784 SNR (dB) 25 Speed Shifts Up/Down/Null 9/8/0 Status : This output from modemChk I don't know why it don't show staus but this is my normal experience all weekend long. connect at v.90 or v.34 then downshift to lower speed within a few miutes then disconnect. I tried several differnt pops thru Hyperterminal and several free ISP numbers and mtu tweaks and I always get same result day and night and I already had a tech check my lines a week ago and he said he did some rewiring by the box. So I don't know what else to do other then try a different modem, which i don't have.
Bob Starnes Tl Posts: 4360 USA	Posted - 9/3/2001 6:11:18 PM > SNR (dB) 25 > Disconnect Reason is Unable to Retrain SNR (Signal to Noise Ratio) is quite low, lower number not good, higher numbers better. This and the Disconnect Reason would lead me to believe that you have a phone line problem. Might try the modem on a different known good 56k line to see if you get a better, more stable connection. If so then the phone line is your problem, if not then there may be a problem with the modem. Might also try removing all other phones and phone line devices from the same line that the modem in on and try a connection with only the modem using the line to see if you can connect any differently.
SARGE Tl Posts: 743 USA	Posted - 9/3/2001 8:41:32 PM What are responses for aty11 after a session, or during, using Hyperterminal to make the call?
DeanD Tl Posts: 2	Posted - 9/4/2001 11:39:35 AM heres from my last call it connected at 44,000 bps and I disconnected the call and I used no extra init. My modem is also connected to the jack with nothing else connected to the line. I have 2 lines in my house. ati6i11Y11 U.S. Robotics 56K FAX INT Link Diagnostics... Chars sent 56713 Chars Received 603086 Chars lost 0 Octets sent 32354 Octets Received 396609 Blocks sent 1752 Blocks Received 3948 Blocks resent 31 Retrains Requested 0 Retrains Granted 1 Line Reversals 0 Blers 470 Link Timeouts 44 Link Naks 5 Data Compression V42BIS 2048/32 Equalization Long Fallback Enabled Protocol LAPM Speed 28800/21600 Last Call 00:21:44 Disconnect Reason is DTR dropped U.S. Robotics 56K FAX INT Link Diagnostics... Modulation V.34 Carrier Freq (Hz) 1959/1959 Symbol Rate 3429/3429 Trellis Code 64S-4D/64S-4D Nonlinear Encoding ON/ON Precoding OFF/ON Shaping ON/ON Preemphasis (-dB) 6/0 Recv/Xmit Level (-dBm) 22/13 Near Echo Loss (dB) 29 Far Echo Loss (dB) 55 Carrier Offset (Hz) 5334 Round Trip Delay (msec) 6 Timing Offset (ppm) 6112 SNR (dB) 35 Speed Shifts Up/Down/Null 16/21/1 Status : Freq Level (dB) 150 24 300 21 450 21 600 21 750 20 900 21 1050 21 1200 20 1350 20 1500 21 1650 21 1800 21 1950 21 2100 21 2250 21 2400 21 2550 21 2700 21 2850 21 3000 22 3150 21 3300 21 3450 23 3600 25 3750 30 OK
Bob Starnes Tl Posts: 4360 USA	Posted - 9/4/2001 11:44:46 PM I'm not real good with the USR modems but the Freq Level curve doesn't look promising to me. I'd suspect you line to be borderline 56k capable. Might try disabling 56k (X2 & V.90) and see how the connection goes. Try using S32=98 in the Extra Settings.

Click Here To Close Thread, Administrators & Moderators Only.

Show All Forums |