Помогите настроить модем на максимальную скорость.

[Dims]

Добрый день. Посоветуте пожалуйста какие можно сделать настройки чтоб добиться максимальной скорости работы модема на V.90.
Модем 5614 прошивка 2.26.
Привожу статистику при настройках по умолчанию (инит. строка пустая):
Rockwell Diagnostics/W32, version 1.3.0.0, compiled at Jun 13 2002 22:35:24
(c) 2000 Stanislav V. Mekhanoshin (rampitec@tu.spb.ru, 2:5030/172.9@fidonet)
----------------------------------------------------------------------------
Connection time : 01:30:29
Handshake Time/Retries : 26 sec/0
TX Rate (Last/Init/Min/Max) : 28800/26400/26400/28800
RX Rate (Last/Init/Min/Max) : 50667/48000/48000/53333
Modulation/Protocol/Compression : V.90/LAPM/V.42bis
TX Symbol rate : 3200
Signal Level (TX/Power Drop), -dB : 15/2
RX Signal Level (Last/Min/Max), -dB : 14/14/14
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 8.188
EQM Value (Last/Min/Max/Negative) : 18/6/124/0
EQM Samples Running Sum : 009B
EQM Last 10 Readings : 22 25 23 22 39 20 26 29 16 19
SNR Ratio (Last/Min/Max), dB : 46/46/46
TX Non-linear Encoding : OFF
TX Precoding : OFF
TX/RX Constellation Shaping : OFF/OFF
TX Trellis Encoding : 16 state
TX Pre-emphasis : 0
TX/RX state (Max TX/RX, Last TX/RX) : 87H/67H, 87H/65H
Error Correction Status : SABME:T UA:T,R XID:T,R SYNC
Dual PCM/120 Hz detection : No/No
Energy at 3750Hz/Average Energy : 3773/1824
RBS Pattern/Alternating RBS Pattern : 00/00
V.90 Digital Pad/A-law/HighPowerSrv : 2dB/No/No
Retrains (Issued/Granted/Fast) : 0/0/4
Renegs (Issued/Granted) : 8/0
Retrans per frame/Frames rejected : 1/32
Total number of REJ sent/received : 32/0
Last Retrain/Reneg reason : Fall-forward due to low EQM
Last Retrain/Reneg requested : Local Fast Retrain
Minutes Since Last Retrain/Reneg : 46
Disconnect reason : LINK DISCONNECT
Remote Manufacturer/Licensee Code : Conexant/Conexant
Remote Manufacturer's Product Caps : K56Flex, V.90
Remote V.8bis caps (type) : Digital (Server)
Remote V.8bis caps (K56Flex mode) : K56Flex prototype mode not supported
Remote V.8bis caps (K56Flex version): 1.1
Remote K56Flex RAM version supported: 70
Remote Coding used/forced by server : A-law/Yes
Remote controller version number : 0
Remote supports symbol rate (1,2,5) : 2743:ON 2800:ON 3429:ON 3429-TX:ON
Remote supports symbol rate (3,4) : 3000-L:ON 3000-H:ON 3200-L:ON 3200-H:ON
Remote power drop support : ON
Remote max symbol rate difference : 0 steps
Remote is a CME modem : No
Remote supports V.34bis : Yes
Remote frequency source : Internal
Remote is ITU/K56Flex neg/High IMD : Yes/Yes/No
V.8 bis CRe detected/early : Yes/No
CRe/CRd/CL/MS/ACK/NAK received : Yes/No/Yes/No/Yes/No
V.8bis success/V.8bis neg started : Yes/Yes

[Technical Support]

В общем-то, уже сейчас всё работает очень хорошо. Можно попробовать чуть поднять скорость начального соединения, чтобы избежать "лишних" пересогласований в начале сеанса связи.

Пропишите такую строку инициализации:

S91=18 S210.7=1 S17=52 S202.3=1

и попробуйте поработать. Если надумаете присылать статистику, то посылайте полную (at%s, at%s1, at#ud), а не только at%s1.
_________________
Inpro
Technical Support

[Dims]

Прописал рекомендованную строку.
Полученный результат это предел или есть еще резерв?
Вот полная статистика соединения:
[2004.12.27 14:52:24 - 2004.12.27 15:10:31] ........
Connection : ........
Time online : 00:18:06
Client IP address : 212.42.....
Server IP address : 212.42....
PPP negotiation time : 6 sec
Authentication : PAP
Multilink framing : No
Downstream compression : VJ PFC (CCP failed, 733)
Upstream compression : VJ PFC
Downstream encryption : None
Upstream encryption : None
Connection speed : 52000 bps
Bytes received : 6117006 (at 5632 B/sec)
Bytes transmitted : 227511 (at 209 B/sec)
Inactive time : 00:00:42 (efficiency 96.1 %)
Active receive speed : 5863 B/sec
Assumed cont-load recv speed : 5830 B/sec
Frames received : 4438
Frames transmitted : 4449
CRC errors : 14
Timeout errors : 0
Alignment errors : 2
Hardware overruns : 14
Buffer overruns : 0
Framing errors : 0
Downstream compression ratio : 0 %
Upstream compression ratio : 59 %


DeviceName: IDC 5614BXL VR PnP
UserInit: S13.7=1 S91=18 S210.7=1 S17=52 S202.3=1
----------------------------------------------------------------------
Time Online.................. 00:18:12
Termination Reason........... LINK DISCONNECT
Tx Rate (Last/Init/Min/Max).. 28800/26400/26400/28800 bps
Rx Rate (Last/Init/Min/Max).. 50667/52000/50667/52000 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 23
Tx/Power Drop/Rx Level....... 18/0/15
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 0075
RBS Pattern.................. 00
Rate Drop.................... 1
Digital Loss................. 2788
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 3/0
FForwards/FBacks/FEQM/Denied. 1/2/2/0
Forced FB/FB after FF/MaxREJ. 0/1/2
Last dialed number........... T#8#2359988
V90 9481834246E0

Rockwell Diagnostics/W32, version 1.3.0.0, compiled at Jun 13 2002 22:35:06
(c) 2000 Stanislav V. Mekhanoshin (rampitec@tu.spb.ru, 2:5030/172.9@fidonet)
----------------------------------------------------------------------------
Connection time : 00:18:12
Handshake Time/Retries : 26 sec/0
TX Rate (Last/Init/Min/Max) : 28800/26400/26400/28800
RX Rate (Last/Init/Min/Max) : 50667/52000/50667/52000
Modulation/Protocol/Compression : V.90/LAPM/V.42bis
TX Symbol rate : 3200
Signal Level (TX/Power Drop), -dB : 18/0
RX Signal Level (Last/Min/Max), -dB : 14/14/14
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 8.500
EQM Value (Last/Min/Max/Negative) : 23/14/48/0
EQM Samples Running Sum : 0075
EQM Last 10 Readings : 18 19 19 29 25 22 35 22 25 20
SNR Ratio (Last/Min/Max), dB : 46/46/46
TX Non-linear Encoding : OFF
TX Precoding : OFF
TX/RX Constellation Shaping : OFF/OFF
TX Trellis Encoding : 16 state
TX Pre-emphasis : 0
TX/RX state (Max TX/RX, Last TX/RX) : 87H/67H, 87H/67H
Error Correction Status : SABME:T UA:T,R XID:T,R SYNC
Dual PCM/120 Hz detection : No/No
Energy at 3750Hz/Average Energy : 3783/1829
RBS Pattern/Alternating RBS Pattern : 00/00
V.90 Digital Pad/A-law/HighPowerSrv : 2dB/No/No
Retrains (Issued/Granted/Fast) : 0/0/1
Renegs (Issued/Granted) : 2/0
Retrans per frame/Frames rejected : 1/6
Total number of REJ sent/received : 6/1
Last Retrain/Reneg reason : Fall-back due to high EQM
Last Retrain/Reneg requested : Local Rate Renegotiation
Minutes Since Last Retrain/Reneg : 17
Disconnect reason : LINK DISCONNECT
Remote Manufacturer/Licensee Code : Conexant/Conexant
Remote Manufacturer's Product Caps : K56Flex, V.90
Remote V.8bis caps (type) : Digital (Server)
Remote V.8bis caps (K56Flex mode) : K56Flex prototype mode not supported
Remote V.8bis caps (K56Flex version): 1.1
Remote K56Flex RAM version supported: 70
Remote Coding used/forced by server : A-law/Yes
Remote controller version number : 0
Remote supports symbol rate (1,2,5) : 2743:ON 2800:ON 3429:ON 3429-TX:ON
Remote supports symbol rate (3,4) : 3000-L:ON 3000-H:ON 3200-L:ON 3200-H:ON
Remote power drop support : ON
Remote max symbol rate difference : 0 steps
Remote is a CME modem : No
Remote supports V.34bis : Yes
Remote frequency source : Internal
Remote is ITU/K56Flex neg/High IMD : Yes/Yes/No
V.8 bis CRe detected/early : Yes/No
CRe/CRd/CL/MS/ACK/NAK received : Yes/No/Yes/No/Yes/No
V.8bis success/V.8bis neg started : Yes/Yes


Unimodem Diagnostics/W32, version 1.1.0.1, compiled at Nov 20 2002 22:29:58
(c) 2000 Stanislav V. Mekhanoshin (rampitec@tu.spb.ru, 2:5030/172.9@fidonet)
----------------------------------------------------------------------------
Diag Command Specification rev.: 1.0
Call Setup Result code : Data Answering signal detected
Multi-media mode : Data Only
DTE-DCE interface mode : Async data
TX/RX signal power level, -dBm : 18/15
Estimated noise level, -dBm : 58
TX/RX Negotiation : V.34/V.90 Issue 1 (asymmetric)
TX/RX Symbol Rate : 3200/8000
TX/RX Carrier frequency, Hz : 1829/0
TX data rate (Last/Init) : 28800/26400
RX data rate (Last/Init) : 50666/52000
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 3
Retrains Requested/Granted : 0/0
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 1
Error control NAKs received : 1
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 111833/6193116
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 8477/48048
TX/RX I-Frame error count : 1/6
Termination Cause : Disconnect Frame Received


Modem Session Analyzer
-------------------------------------------------------------
Session time : 00:18:12
Retrains issued/granted/auto : 0/0/0
Renegs issued/granted/rrws : 2/0/1
TX Rate last/init : 28800/26400
RX Rate last/init : 50666/52000
Error control protocol/frame size : LAP-M/128
Average RX chars per frame : 128
TX frames/errors : 8477/1 (0.01 %)
RX frames/errors : 48048/6 (0.01 %)
Potential upstream cps : 3225
Potential downstream cps : 5998

[Technical Support]

Похоже, что это - предел. А разве Вас что-то не устраивает? Если да, то расскажите, попробуем подумать, что это и как можно исправить.
_________________
Inpro
Technical Support