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| David Modine Tl Posts: 11 USA | Posted - 4/10/2002 12:35:52 PM    I just got a 5686D in hopes it would handle my poor phone lines better than the included PCI modem in my new computer. I can't even get it to connect. (error 678) Should I be using the standard XP driver? When I try to update driver from the USR disc, windows tells me "unable to update driver". When I run diagnostics, I get a couple lines that say "Command Not Supported". Log of diagnostics pasted below >>ATQ0V1E0 - OK AT+GMM - H.324 video-ready rev. 1.0 AT+FCLASS=? - 0,1,2.0 AT#CLS=? - COMMAND NOT SUPPORTED AT+GCI? - COMMAND NOT SUPPORTED AT+GCI=? - COMMAND NOT SUPPORTED ATI1 - 752F ATI2 - OK ATI3 - U.S. Robotics 56K FAX EXT V5.2.9 ATI4 - U.S. Robotics 56K FAX EXT Settings... B0 E0 F1 M1 Q0 V1 X4 Y0 BAUD=115200 PARITY=N WORDLEN=8 DIAL=TONE ON HOOK CID=1 &A0 &B1 &C1 &D2 &G0 &H1 &I0 &K1 &M4 &N0 &P0 &R2 &S0 &T5 &U0 &Y1 S00=000 S01=000 S02=043 S03=013 S04=010 S05=008 S06=004 S07=060 S08=002 S09=006 S10=014 S11=070 S12=050 S13=000 S15=000 S16=000 S18=000 S19=000 S21=010 S22=017 S23=019 S25=005 S27=000 S28=008 S29=020 S30=000 S31=128 S32=002 S33=000 S34=000 S35=000 S36=014 S38=000 S39=000 S40=001 S41=000 S42=000 LAST DIALED #: T3019178111 ATI5 - U.S. Robotics 56K FAX EXT NVRAM Settings... Template Y0 DIAL=TONE B0 F1 M1 X4 BAUD=115200 PARITY=N WORDLEN=8 &A3 &B1 &G0 &H1 &I0 &K1 &M4 &N0 &P0 &R2 &S0 &T5 &U0 &Y1 S00=001 S02=043 S03=013 S04=010 S05=008 S06=004 S07=060 S08=002 S09=006 S10=014 S11=070 S12=050 S13=000 S15=000 S19=000 S21=010 S22=017 S23=019 S25=005 S27=000 S28=008 S29=020 S30=000 S31=128 S32=002 S33=000 S34=000 S35=000 S36=014 S38=000 S39=000 S40=001 S41=000 S42=000 Strike a key when ready . . . Template Y1 DIAL=TONE B0 F1 M1 X4 BAUD=115200 PARITY=N WORDLEN=8 &A3 &B1 &G0 &H2 &I2 &K1 &M4 &N0 &P0 &R1 &S0 &T5 &U0 &Y1 S00=001 S02=043 S03=013 S04=010 S05=008 S06=004 S07=060 S08=002 S09=006 S10=014 S11=070 S12=050 S13=000 S15=000 S19=000 S21=010 S22=017 S23=019 S25=005 S27=000 S28=008 S29=020 S30=000 S31=128 S32=002 S33=000 S34=000 S35=000 S36=014 S38=000 S39=000 S40=001 S41=000 S42=000 STORED PHONE #0: #1: #2: #3: ATI6 - U.S. Robotics 56K FAX EXT Link Diagnostics... Chars sent 0 Chars Received 0 Chars lost 0 Octets sent 0 Octets Received 0 Blocks sent 0 Blocks Received 0 Blocks resent 0 Retrains Requested 0 Retrains Granted 0 Line Reversals 0 Blers 0 Link Timeouts 0 Link Naks 0 Data Compression NONE Equalization Long Fallback Enabled Last Call 00:00:00 Disconnect Reason is Unable to Retrain ATI7 - Configuration Profile... Product type US/Canada External Product ID: 00568604 Options V32bis,V.80,V.34+,x2,V.90,V.92 Fax Options Class 1/Class 2.0 Line Options Caller ID, Distinctive Ring Clock Freq 92.0Mhz EPROM 256k RAM 32k FLASH date 2/16/2001 FLASH rev 5.2.9 DSP date 2/16/2001 >> DSP rev 5.2.9 The log file from trying to connect is incredibly long. Any suggestions? I'm lost! David |
| David Modine Tl Posts: 11 USA | Posted - 4/10/2002 12:44:57 PM I added S32=98 & connected at 26.4 David |
| Troubled_user Tl Posts: 263 USA | Posted - 4/15/2002 12:25:03 PM The 5686D is a hardware modem, so updating the drivers have no effect on performance. USR modems do not support many of the plus sign commands, so it's normal to get a few command not supported messages. You have firmware flash 5.2.9 This is the one included with the modem. There are so many horror stories that a modem that connected at 48 after flashing connects at 19.2!!! |
| v.Richard Tl Posts: 6222 USA | Posted - 4/16/2002 9:59:23 AM  Suggestions: With the USR 5686D, get & post here the results from aty11 Use Hyperterminal directly connected to the modem COM port: www.modemsite.com/56k/x2-hyperterm.asp Also see www.modemsite.com/56k/x2-adconversion.asp If your line won't support 56k, or if it's marginal for 56k, you'll probably do best with 56k disabled - no matter what modem you use. If 56k isn't disabled and your line won't support a 56k connect, the modem does a "double handshake" which takes longer; if the timeout to get carrier/connect is too short, no connect at all (Error 678) is the result; you could lengthen the timeout, but disabling 56k is preferable since the dial/handshake time is shortened, and often you'll get a better V.34 rate when V.90 is not even tried. Aloha! Richard. |
| Troubled_user Tl Posts: 263 USA | Posted - 4/16/2002 12:01:01 PM The USR "line probing" technology would only handle lines better in V.90/V.92 modes. The two metallic spring sounds in the handshake indicate that it is being used. All modems, more or less, handle V34 the same. Post what v.Richard told you to post and we'll see from there |
| David Modine Tl Posts: 11 USA | Posted - 4/17/2002 2:23:32 AM Here's the responce from hyperterminal Freq Level (dB) 150 35 David |
| charles Tl Posts: 5879 USA | Posted - 4/17/2002 8:50:18 AM First of all, if the value of 3750 is close to 50, you may have poor local phone lines and may want to check into noise. Now, take the level of 3300 and subtract it from the level of 3750. If the value is 25 or higher, you most likely have too many A/D, D/A conversions which indicates that you can not achieve 56k speeds. If the value is betwen 20 and 25, you MAY have too many A/D, D/A conversions and you may not be able to achieve 56k speeds. Try your pc at a friends house if you can that gets a good 56k connnect.Pick up the phone and dial one number,do you hear any cross talk or other sounds,clicks...ect? Try connecting to the telco box outside.Are you using a extra long phone cord from the modem to the wall jack.Unhook everything from the phone wall jacks in the house and try again.Have you had a second line installed? Is this a name brand pc and how much ram do you have installed. |
| charles Tl Posts: 5879 USA | Posted - 4/17/2002 8:57:31 AM Try the ati11 in Hyperterminal right after you disconnect. |
| Troubled_user Tl Posts: 263 USA | Posted - 4/17/2002 12:02:29 PM About the No Carrier message: USR modems, after falling back to V34 in the handshake, will do 6 to 7 ADDITIONAL retrains, UNTIL IT CAN MAKE A 24000 or HIGHER connection. |
| charles Tl Posts: 5879 USA | Posted - 4/18/2002 2:06:01 AM Many homes and businesses are attached to the central office by a "SLICK" or "Subscriber Loop Carrier" system, such as SLC-96 or SLC Series 5. If such a system is present, the line from a subscriber's phone first goes to a SLC "remote terminal" (which is typically in an underground vault in the neighborhood, in the basement of the office building, etc.). At that point the analog signal is converted to 64Kbps digital; then 24 of these are put on two pairs (one for sending, one for receiving) and then this goes to the central office. At the central office there are several ways of attaching to the switch, but in so-called "universal SLC", the 24 signals go to a "CO-terminal", where they are demultiplexed and converted back to analog before attaching to the switch. A SLICK creates a D to A conversion then an A to D conversion. The later A to D conversion will not allow you to get 56K (PCM) rates. None of the protocols (V.90, K56Flex or X2) will give you 56K rates with the extra A to D conversion |
| David Modine Tl Posts: 11 USA | Posted - 4/18/2002 2:35:05 AM I'm pretty sure I have crappy phone lines or the SLICK situation charles talks about. Here is the result of ati11 right after disconnecting: .S. Robotics 56K FAX EXT Link Diagnostics...
The computer is a new Gateway P4 1.8 with 256 ram. It came with a gateway internal modem, which connected consistantly at even slower rates than the USR 5686 is giving me. Will telephone companys (Verizon in my case) give out information on SLICK and how many A/D D/A conversions my phone lines go through? Moving the computer somewhere else with a good phone line won't change my at home situation, & would be a bit inconveniant. I could take the modem only to work & try it out there. I have already checked all internal house wiring & jacks, & have tryed plugging in directly to the outside tellco box. No change. I can't hear any noises or clicking while talking on the phone. Frome what I have read here & other places, phone companys are not usually too responsive to complaints about modem connection rates, they only service issues/problems with voice communications over the phone lines, which I don't have. I guess I'm kind of stuck with 26.4 ????????? David |
| SARGE Tl Posts: 743 USA | Posted - 4/18/2002 7:44:02 AM Telco is providing you with a "voice grade line". As they say, if you can get 56k speeds, good, but if not, a data line can be purchased. Makes sense to me. You can ask telco repair to run a noise & transmission test from your dmarc; they're required to meet specs for a voice grade line, free of charge. When the friendly tech is there, ask him what kind of facilities you're on. Then, you'll know what's up. |
| charles Tl Posts: 5879 USA | Posted - 4/18/2002 8:49:48 AM SNR (dB) 34 SNR Range (Note: SNR = Signal to Noise Ratio)
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| charles Tl Posts: 5879 USA | Posted - 4/18/2002 10:23:57 AM Might try adding &U13&N16 to your modem string. |
| Troubled_user Tl Posts: 263 USA | Posted - 4/18/2002 6:11:21 PM As I've said to a previous post, 31.2 and 33.6 are nearly impossible to obtain, I'd say that 26.4 to 28.8 are theoretical maximum values. BTW, is there a way to limit UPstream on USR modems? Probably not, never found it. |
| Troubled_user Tl Posts: 263 USA | Posted - 4/18/2002 6:19:19 PM This is where the line-backer plan (by ameritech, others offer similar plans) comes into play: I had similar problems with my phone line (connect 16.8, retrains to 12.0), and this guy came down to check my lines. He attached a probe thing to my demarc, and said to me "this number should be in the 20's for good 56k", and the needle was in the 50's. He said that he was surprised that it didn't affect the voice!! The problem turns out to be that our previous house owners installed 3 lines, and there was a point upstairs that all three lines created a short circuit! After that, I had clear 48-50k connects (probably you won't be as lucky) and no problems whatsoever, so unlike stated on 808hi, these line-backer plans are not completely useless |
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