From the ATS$ command: == skip so s54=64 should enable all symbol rates. I don't think there's a *direct* relationship between the S54 register and anything in the v.34 spec. I know. Not all S-register on modem worked as defined in help and/or documentations. For sample S55 - USR support only 64S-4D trellis on recive stream.
But I can`t understand why HiperDSP not support 2800 symbol rate, supported on other USR modems line... And other strange thing like that: We are made wide statistical test calls for compiring Cisco (AS5300, MICA modem) and USR Hiper NASes and get very strange output. All calls on Hiper would have more power reduction on high frequencies, in comparison with MICA. For sample two typical calls (from 200 calls series) at same time from one point and one modem: ======= Connection Summary: USR HiPer +-----------------------+-----------------+-----------------------------+ | USRSTATS Version 4.19 | 03-08-00 20:12 | 9955554 | +-----------------------+-----------+-----+-----------------------------+ | Elapsed Time 00:00:31 | Modulation V.34+ | | Blocks Received 9 | Speed 31200/24000 | | Blers 0 | Symbol Rate 3429/3429 | | Blocks sent 12 | Carrier Frequency 1959/1959 | | Link Naks 0 | Trellis Code 64S-4D/64S-4D | | Blocks resent 0 | Nonlinear Encoding On/On | | Link Timeouts 0 | Precoding On/On | | Chars sent 12 | Shaping On/On | | Octets sent 12 | Preemphasis 6/6 | | Chars lost 0 | Rx Lev/TX Lev/SNR 29/10/ 38 | | Chars Received 223 | Echo Loss Near 65 Far 76 | | Octets Received 227 | Roundtrip Delay 6 | | Protocol LAPM | Retrains Request/Grant 0/0 | | Block Size | Fallback Disabled | | Window Size | HST Line Reversals 0 | | Compression V42BIS | HST Equalization Long | | Dictionary Size 2048 | SV: DSP: | | String Length 32 | Reason: Online | +-----------------------------------+-----------------------------------+ Channel Probe: +---------------------------------------------------------------+ | -24 | . x X X X x x x . . . . . . . . . . . . . . . . . | 1 | | -26 | . X X X X X X X X X x x . . . . . . . . . . . . . | 3 | | -28 | . X X X X X X X X X X X X X x x . . . . . . . . . | 5 | | -30 | . X X X X X X X X X X X X X X X X X x x . . . . . | 7 | | -32 | X X X X X X X X X X X X X X X X X X X X X . . . . | 9 | | -34 | X X X X X X X X X X X X X X X X X X X X X X . . . | 11 | | -36 | X X X X X X X X X X X X X X X X X X X X X X X . . | 13 | | -38 | X X X X X X X X X X X X X X X X X X X X X X X . . | 15 | | -40 | X X X X X X X X X X X X X X X X X X X X X X X x . | 17 | | -42 | X X X X X X X X X X X X X X X X X X X X X X X X . | 19 | | -44 |=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=X=.=| 21 | | -46 | X X X X X X X X X X X X X X X X X X X X X X X X . | 23 | | -48 | X X X X X X X X X X X X X X X X X X X X X X X X X | 25 | |Level+---------------------------------------------------+Atten| | 0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 | | 1 3 4 6 7 9 0 2 3 5 6 8 9 1 2 4 5 7 8 0 1 3 4 6 7 | | 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | +---------------------------------------------------------------+ =============================================================================== Connection Summary: Cisco +-----------------------+-----------------+-----------------------------+ | USRSTATS Version 4.19 | 03-08-00 20:28 | 9955555 | +-----------------------+-----------+-----+-----------------------------+ | Elapsed Time 00:00:33 | Modulation V.34+ | | Blocks Received 10 | Speed 31200/21600 | | Blers 0 | Symbol Rate 3429/3429 | | Blocks sent 9 | Carrier Frequency 1959/1959 | | Link Naks 0 | Trellis Code 64S-4D/64S-4D | | Blocks resent 0 | Nonlinear Encoding On/On | | Link Timeouts 0 | Precoding On/On | | Chars sent 12 | Shaping On/On | | Octets sent 9 | Preemphasis 6/6 | | Chars lost 0 | Rx Lev/TX Lev/SNR 31/10/ 37 | | Chars Received 255 | Echo Loss Near 65 Far 76 | | Octets Received 248 | Roundtrip Delay 6 | | Protocol LAPM | Retrains Request/Grant 0/0 | | Block Size | Fallback Disabled | | Window Size | HST Line Reversals 0 | | Compression V42BIS | HST Equalization Long | | Dictionary Size 2048 | SV: DSP: | | String Length 32 | Reason: Online | +-----------------------------------+-----------------------------------+ Channel Probe: +---------------------------------------------------------------+ | -26 | . . . x . . . . . . . . . . . . . . . . . . . . . | 0 | | -28 | . x X X X X X x . . . . . . . . . . . . . . . . . | 2 | | -30 | . X X X X X X X X X x x . . . . . . . . . . . . . | 4 | | -32 | . X X X X X X X X X X X X X x x . . . . . . . . . | 6 | | -34 | x X X X X X X X X X X X X X X X X X x x . . . . . | 8 | | -36 | X X X X X X X X X X X X X X X X X X X X X X x . . | 10 | | -38 | X X X X X X X X X X X X X X X X X X X X X X X x . | 12 | | -40 | X X X X X X X X X X X X X X X X X X X X X X X X . | 14 | | -42 | X X X X X X X X X X X X X X X X X X X X X X X X x | 16 | |Level+---------------------------------------------------+Atten| | 0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 | | 1 3 4 6 7 9 0 2 3 5 6 8 9 1 2 4 5 7 8 0 1 3 4 6 7 | | 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 | | 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 | +---------------------------------------------------------------+ ========
But I would be *very* interested to see if there's a way to get anything this low-level out of *any* modem... (I'm still hoping I could use something like that to ID the brand of modem at the remote end -- that would be *great* for troubleshooting.) So how did you get the INFO0 bits directly? Please share. :) Not I am. It maked for me one INPRO company engeneer who write code for modem based on Lucent (AT&T) 1634 datapump. He know many backdoors for DSP. As I belive all modem on that chipset may give handshake sequince for human who know secret word... ;-))
Other interesting thing - russian code for popular USR courer modem ID_SDL 4.03 is able get V90 and V42 sequence by ATI30I31 command. ftp://ftp.usr.spb.ru/courier/id_sdl/ I am sorry, but documentation only on russian language... Or special equipment for modem trobleshuting like http://www.analytic.ru/
How new is your copy of the v.34 spec? They charge money for copies of that nowadays. I have an older copy from before that time, but it's out of date and doesn't include the 31.2K/33.6K extensions. I have V0034e document. It cost no many - ~40$, like good book in shop. ===== ITU-T V.34 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (10/96)
SERIES V: DATA COMMUNICATION OVER THE TELEPHONE NETWORK Interfaces and voiceband modems A modem operating at data signalling rates of up to 33 600 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits ITU-T Recommendation V.34 (Previously CCITT Recommendation) ====== Good luck ! ====================== Andrey Zimin | AVZ7-RIPE MTU-Intel ISP Moscow, Russia ====================== - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.