POTS line quality help

I note the S33, S34 relate to V34+ but know nothing about symbol rates and 8S, 16S etc so have no clue as how to force V34+; all i know is that those registers are zero meaning none of that is disabled.

Try the +MS: command Twiddling individual registers will get you into trouble unless you know exactly what you are doing (and it is clear you do not).

When you say that I imagine the police contraption used for deflating stolen car tyres. But in this context I expect it is a Lucent/Ascend extender product which ought to give reasonable bandwidth.

They are only obliged to give you a service capable of voice grade communications - that is what you are paying for. Real copper is reserved now for profitable customers - as an advocate of free market capitalism you ought to understand that you will be disadvantaged.

In the UK you can choose your ADSL supplier and packages vary in both content, amount of download per month, speed and price. eg

Even better deals available if you bundle your mobile phone, landline and DSL service with one provider and pay monthly by direct debit.

I am very surprised that it is not the same in the USA. Are you really saying that your Telco has a monopoly over ADSL service provision?

Even if they do there are mobile phone data dongles that for moving modest amounts of data can be cost effective.

Or are you saying that you cannot afford $10/month?

Regards, Martin Brown

Here is some info:

• Modem: US Robotics 5686.
• Only "M" commands in CD manual: M0, M1, M2, M3 speaker control; &Mn sets error control (ARQ).
• S91: ERROR (ie: not recognized).
• S32=96 or =64 or =32 all gave same thing, the VOIP test showed 12.9K download, 13.0K upload and modem query I6 afterwards showed speed 14,400 and V42BIS and icon indicated 115,200bps.
• S32=98 the VOIP test showed 11.1K download, 26.0K upload and modem query I6 afterwards showed speed 28800/28800 and V42BIS and icon indicated 28,800bps.
• S32=2 the VOIP test showed 42.6K download, 19.4K upload and modem query I6 afterwards showed speed 48000/21600 as well as V.90 peak speed

The wierd pig and pbi were from the software which one could tradeoff upload speed for download speed; the graph showed one could get 56K download but no way in hell.

Co$t... Absolutely any service other than straight dial-up costs in the region of $30 or more: DSL add-on, cable; satellite costs $60 installation and $60/month and it is unreliable even in good weather; WiNet ("Clear") is $30/mo and up; neither WiFi nor WiNet works without a goodly outdoor antenna and distribution amp (even a cell phone does not work until one gets 200 feet or more away from house toward street). Hell even dial-up is in the $30/mo region! Aint no service in the $10/month region unless one uses tin cans and string (or lots of yelling).

Pay careful attention the command if it exists is +MS:

It should be with the other "+" prefix commands.

These may be about as good as you can get on the poxy voice line your telco has given you. 26k upload on a 28800/28800 connect (but poor download) and a 42.6k download with ~20k upload for V90. Only you can decide if the additional 25% upload speed gain is worth using when sending bulky material to the net. I would say probably not given the terrible download speed you seem to get with those settings.

You probably want to figure out how to limit the initial connect speed to 42.6 or 44.0k to avoid having fallback negotiation delays every time.

This is clearly a big step backwards- use the previous settings instead!

That is their implementation of access to the S91 xmit gain register and related settings. Manufacturers do vary - in some countries you are not allowed to alter the line gain at all.

Regards, Martin Brown

Here is a recap of what i have:

DUN modem setup string: s0=0 s32=2 +PIG=0 +PBI=2

U.S. Robotics 56K FAX EXT Link Diagnostics...

Chars sent 799104 Chars Received 7875685 Chars lost 0 Octets sent 424039 Octets Received 6317772 Blocks sent 19931 Blocks Received 51791 Blocks resent 81

Retrains Requested 0 Retrains Granted 1 Line Reversals 0 Blers 761 Link Timeouts 6 Link Naks 5

Data Compression V42BIS 2048/32 Equalization Long Fallback Enabled Protocol LAPM/SREJ Speed 49333/21600 V.90 Peak Speed 49333 Last Call 01:50:03

Disconnect Reason is DTR dropped

OK

U.S. Robotics 56K FAX EXT Link Diagnostics...

Modulation V.90/V.34 Carrier Freq (Hz) None/1920 Symbol Rate 8000/3200 Trellis Code None/64S-4D Nonlinear Encoding None/ON Precoding OFF/ON Shaping OFF/ON Preemphasis Index 5/10 Recv/Xmit Level (-dBm) 23.1/8.6 Near Echo Loss (dB) 43.0 Far Echo Loss (dB) 0 Carrier Offset (Hz) 0 Round Trip Delay (msec) 13 Timing Offset (ppm) 2469 SNR (dB) 47.9 Speed Shifts Up/Down/Null 2/0/13 Status : uu,5,12N,12.1,-7,0N,000,49.8,-60.0,0 OK

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=0

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=010

LAST DIALED #: T5039804040

OK

I fiddled a lot, using their modem control software. Makes it easy to (presumedly) turn off V.90 and/or V.92 but in reality (after the session using ATI11) V.94 is always on. According to the software, 53K is max download and 31.2K max upload as "mandated" by the FCC. At one point i got 32K download and 21K upload and tried to push that further. Well........... ....... ...... AFU! at first it would not login, then it ceased to recognize something about the protocol. Could not figure WTF to fix so had to dump that drive, and now i have to figure out what new files are on that drive to copy over to this backup. I think i better give up.