ПОДСКАЖИТЕ как улучшить скорость работы модема???

[SeV]

сначала я снял простую статистику (статистика-1), и для проверки, еще одну(статистика-2), потом использовал команду S91=18 S210.7=1 S55.4=1 S202.3=1 S17=48 , обновил прошивку до 2.26 поставил дрова под xp (были 2000 на win xp) и снял (статистику-3). Подскажите, можно ли еще что нибудь выжать по скорости???
(статистика-1),

Inpro IDC Modems Diagnostics, Version: 1.1.4.39
15.01.2006 23:51:29 - Direct Log Write Entry
--------------------------------------------------------
Modem Type: IDC-5614BXL/VR+ (Plus) Firmware Revision: V2.21
System Modem Init String: AT&FS95=41E0<cr>
User Modem Init String:

Time Online.................. 01:38:36
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 31200/28800/28800/31200 bps
Rx Rate (Last/Init/Min/Max).. 46667/45333/45333/46667 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 34
Tx/Power Drop/Rx Level....... 15/2/13
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 00D6
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 1/0
FForwards/FBacks/Denied...... 1/0/0
Forced FB/FB after FF/MaxREJ. 0/0/2
V90 9481834246E0


Negotiation Result (Rx/Tx)... V.90 Issue 1 (asymmetric)/V.34
Symbol Rate (Rx/Tx).......... 8000/3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 34/17/99
EQM Hits..................... 0
EQM Last 10 Readings......... 39 36 37 34 36 42 36 34 35 33
Fast Retrains (RRWS) Count... 1
Last Retrain/Reneg Status.... Local Fast Retrain
Last Retrain/Reneg Reason.... Local Fallforward due to Low EQM
Last Retrain/Reneg Time...... 82 minutes ago
Handshake Time/Retries....... 26 seconds/0
Non-linear Encoding, Rx/Tx... OFF/OFF
Precoding, Rx/Tx............. OFF/OFF
Shaping, Rx/Tx............... OFF/OFF
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 0
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 4,8
Last Rx/Tx State............. 65/87
Energy at 3750Hz/Average .... 8991/3837
Auto Gain Amplitude, db...... 10
Rx Level (Last/Min/Max), -dB. 13,5/13,5/13,5
Detection of 120 Hz Tones.... No
Detection of Dual PCM........ No
V.90 RBS Pattern............. 00
V.90 Alternating RBS Pattern. 00
V.90 Digital Pad Value, db... 0,0
V.90 Optimal Speed........... No Limit (Reg.S120=0)
V.8 Negotiation Started...... Yes
V.8bis Success............... Yes
V.8bis CRe,CRd,CL,MS,ACK,NAK. Yes/No/Yes/No/Yes/No
Remote Manufacturer.......... Rockwell (Conexant)
Remote Licensee Code......... Rockwell (Conexant)
Remote Protocol Support...... K56flex V.90
Remote K56flex Version....... 02
Remote K56flex Capabilities.. Prototype mode is not supported
Remote Type.................. Server (Digital)
Remote supports Symbol Rates. 2743 2800 3429 3000(L) 3000(H)
Remote supports Symbol Rates. 3200(L) 3200(H) 3429(Tx)
Remote supports Power Drop... Yes
Remote is CME Modem.......... No
Remote supports V.34bis...... Yes
Remote Max SR Difference..... 0 Symbol Rate Steps
Remote Frequency Source...... Internal
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/17
Frames Errors, Rx/Tx......... 17/41 (0,0%/0,2%)
Frames Count, Rx/Tx.......... 53450/16503
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 26
Error Control Link NAKs...... 41
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 8 982 104
Characters Sent.............. 1 420 917
Average CPS, Rx/Tx........... 1518/240
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 56

(статистика-2),

Inpro IDC Modems Diagnostics, Version: 1.1.4.39
16.01.2006 3:32:57 - Direct Log Write Entry
--------------------------------------------------------
Modem Type: IDC-5614BXL/VR+ (Plus) Firmware Revision: V2.21
System Modem Init String: AT&FS95=41E0<cr>
User Modem Init String:

Time Online.................. 00:00:39
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 31200/28800/28800/31200 bps
Rx Rate (Last/Init/Min/Max).. 44000/42667/42667/44000 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 17
Tx/Power Drop/Rx Level....... 15/2/13
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 83/87
EQM Sum...................... 00EA
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 1/0
FForwards/FBacks/Denied...... 1/0/0
Forced FB/FB after FF/MaxREJ. 0/0/0
V90 9481834246E0


Negotiation Result (Rx/Tx)... V.90 Issue 1 (asymmetric)/V.34
Symbol Rate (Rx/Tx).......... 8000/3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 17/15/32
EQM Hits..................... 0
EQM Last 10 Readings......... 16 18 18 16 18 17 20 17 16 18
Fast Retrains (RRWS) Count... 1
Last Retrain/Reneg Status.... Local Fast Retrain
Last Retrain/Reneg Reason.... Local Fallforward due to Low EQM
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 22 seconds/0
Non-linear Encoding, Rx/Tx... OFF/OFF
Precoding, Rx/Tx............. OFF/OFF
Shaping, Rx/Tx............... OFF/OFF
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 0
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 5,1
Last Rx/Tx State............. 65/87
Energy at 3750Hz/Average .... 8892/3825
Auto Gain Amplitude, db...... 10
Rx Level (Last/Min/Max), -dB. 13,5/13,5/13,5
Detection of 120 Hz Tones.... No
Detection of Dual PCM........ No
V.90 RBS Pattern............. 00
V.90 Alternating RBS Pattern. 00
V.90 Digital Pad Value, db... 0,0
V.90 Optimal Speed........... No Limit (Reg.S120=0)
V.8 Negotiation Started...... Yes
V.8bis Success............... Yes
V.8bis CRe,CRd,CL,MS,ACK,NAK. Yes/No/Yes/No/Yes/No
Remote Manufacturer.......... Rockwell (Conexant)
Remote Licensee Code......... Rockwell (Conexant)
Remote Protocol Support...... K56flex V.90
Remote K56flex Version....... 02
Remote K56flex Capabilities.. Prototype mode is not supported
Remote Type.................. Server (Digital)
Remote supports Symbol Rates. 2743 2800 3429 3000(L) 3000(H)
Remote supports Symbol Rates. 3200(L) 3200(H) 3429(Tx)
Remote supports Power Drop... Yes
Remote is CME Modem.......... No
Remote supports V.34bis...... Yes
Remote Max SR Difference..... 0 Symbol Rate Steps
Remote Frequency Source...... Internal
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/1
Frames Errors, Rx/Tx......... 1/1 (0,9%/1,1%)
Frames Count, Rx/Tx.......... 109/90
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 2
Error Control Link NAKs...... 1
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 4 389
Characters Sent.............. 3 261
Average CPS, Rx/Tx........... 112/83
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 56

(статистика-3),

Inpro IDC Modems Diagnostics, Version: 1.1.4.39
16.01.2006 4:37:40 - Direct Log Write Entry
--------------------------------------------------------
Modem Type: IDC-5614BXL/VR+ (Plus) Firmware Revision: V2.26
System Modem Init String: AT&FS38=0S95=41S115=0E0<cr>
User Modem Init String: S91=18 S210.7=1 S55.4=1 S202.3=1 S17=48

Time Online.................. 00:21:31
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 31200/28800/28800/31200 bps
Rx Rate (Last/Init/Min/Max).. 46667/48000/46667/48000 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 32
Tx/Power Drop/Rx Level....... 18/0/13
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 009D
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 1/0
FForwards/FBacks/FEQM/Denied. 0/1/0/0
Forced FB/FB after FF/MaxREJ. 0/0/0
Last dialed number........... T2171111
V90 9481834246E0


Negotiation Result (Rx/Tx)... V.90 Issue 1 (asymmetric)/V.34
Symbol Rate (Rx/Tx).......... 8000/3200
Carrier Frequency Hz, Tx..... 1920
EQM Value (Last/Min/Max)..... 32/21/49
EQM Hits..................... 0
EQM Last 10 Readings......... 33 34 30 36 34 37 37 35 33 32
Fast Retrains (RRWS) Count... 0
Last Retrain/Reneg Status.... Local Rate Renegotiation
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Last Retrain/Reneg Time...... 21 minutes ago
Handshake Time/Retries....... 22 seconds/0
Non-linear Encoding, Rx/Tx... OFF/OFF
Precoding, Rx/Tx............. OFF/OFF
Shaping, Rx/Tx............... OFF/OFF
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 6
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 4,8
Last Rx/Tx State............. 65/87
Energy at 3750Hz/Average .... 8884/3833
Auto Gain Amplitude, db...... 10
Rx Level (Last/Min/Max), -dB. 13,5/13,5/13,5
Detection of 120 Hz Tones.... No
Detection of Dual PCM........ No
V.90 RBS Pattern............. 00
V.90 Alternating RBS Pattern. 00
V.90 Digital Pad Value, db... 0,0
V.90 Optimal Speed........... No Limit (Reg.S120=0)
V.8 Negotiation Started...... Yes
V.8bis Success............... Yes
V.8bis CRe,CRd,CL,MS,ACK,NAK. Yes/No/Yes/No/Yes/No
Remote Manufacturer.......... Rockwell (Conexant)
Remote Licensee Code......... Rockwell (Conexant)
Remote Protocol Support...... K56flex V.90
Remote K56flex Version....... 02
Remote K56flex Capabilities.. Prototype mode is not supported
Remote Type.................. Server (Digital)
Remote supports Symbol Rates. 2743 2800 3429 3000(L) 3000(H)
Remote supports Symbol Rates. 3200(L) 3200(H) 3429(Tx)
Remote supports Power Drop... Yes
Remote is CME Modem.......... No
Remote supports V.34bis...... Yes
Remote Max SR Difference..... 0 Symbol Rate Steps
Remote Frequency Source...... Internal
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/0
Frames Errors, Rx/Tx......... 0/11 (0,0%/0,2%)
Frames Count, Rx/Tx.......... 27400/6804
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 5
Error Control Link NAKs...... 11
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 4 307 065
Characters Sent.............. 469 189
Average CPS, Rx/Tx........... 3336/363
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 56

Заранее спасибо!

[Technical Support]

Если отбросить вторую статистику (слишком короткое соединение), то станет очевидным, что Ваш модем стремится к скорости приёма 46667 бит/с, на которой он себя прекрасно чувствует и может оставаться неограниченно долго. Думаем, что это и есть оптимальная скорость для Вашей линии.

Разница между 1-й и 3-й статистикой лишь в том, что в первом случае модем "зашёл" на оптимальную скорость "снизу" (45333->46667). а в третьем - "сверху" (48000->46667).

По большому счёту, улучшать Вам нечего. Можно чуть понизить агрессивность модема (S17=48 заменить на S17=52), чтобы модем почаще сразу же попадал на 46667 бит/с, но при длительном соединении (5 и более минут) разница несущественна.
_________________
Inpro
Technical Support