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[AlexAka]

Ситуация такая я одно время пользовался провайдером РОЛ у него соедение всегда было с протоколом v.34bis вот статистика (АТС у меня не цифровая)

Inpro IDC Modems Diagnostics, Version 1.0.1.30
01.04.2003 13:09:39 - Outbound Call by RemoteAccess
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:03:30
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 26400/26400/26400/26400 bps
Rx Rate (Last/Init/Min/Max).. 31200/31200/26400/31200 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 37
Tx/Power Drop/Rx Level....... 15/0/25
SNR Last/Min/Max............. 39/39/39
Highest Rx/Tx State.......... 85/87
EQM Sum...................... 004F
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/0/1
Renegs Issued/Granted........ 3/0
FForwards/FBacks/Denied...... 2/1/0
Forced FB/FB after FF/MaxREJ. 0/0/1
Last dialed number........... P7191479
Flex fail 9481834347EB


Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 37/13/127
EQM Hits..................... 0
EQM Last 10 Readings......... 40 39 41 39 39 37 40 42 36 38
Last Retrain/Reneg Status.... Local Rate Renegotiation
Last Retrain/Reneg Reason.... Local Fallforward due to Low EQM
Reason for V.34 Fallback..... Data Pump decision to Fallback in Phase 2
Last Retrain/Reneg Time...... 2 minutes ago
Handshake Time/Retries....... 24 seconds/0
Non-linear Encoding, Rx/Tx... ON/ON
Precoding, Rx/Tx............. ON/ON
Shaping, Rx/Tx............... ON/ON
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 0
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 8,4
Last Rx/Tx State............. 85/87
Energy at 3750Hz/Average .... 525/678
Detection of 120 Hz Tones.... Yes
Detection of Dual PCM........ Yes
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....... 03
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.. 2/5
Frames Errors, Rx/Tx......... 5/38 (0,4%/3,8%)
Frames Count, Rx/Tx.......... 1162/988
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 34
Error Control Link NAKs...... 38
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 250563
Characters Sent.............. 76193
Average CPS, Rx/Tx........... 1193/362
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 64

в основном качество линии 50-57
сейчас я пользуюсь провайдером Corbina и модем последнее время стал соединятся на V90
вот статистика

Inpro IDC Modems Diagnostics, Version 1.0.1.30
01.04.2003 13:03:07 - Direct Log Write Entry
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:00:35
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 26400/26400/26400/26400 bps
Rx Rate (Last/Init/Min/Max).. 36000/36000/36000/36000 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 35
Tx/Power Drop/Rx Level....... 15/1/15
SNR Last/Min/Max............. 41/41/41
Highest Rx/Tx State.......... 67/67
EQM Sum...................... 012E
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 0/0
FForwards/FBacks/Denied...... 0/0/0
Forced FB/FB after FF/MaxREJ. 0/0/2
Last dialed number........... P7284001
V90 9481834246E0


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1920
EQM Value (Last/Min/Max)..... 35/28/86
EQM Hits..................... 0
EQM Last 10 Readings......... 60 30 34 34 52 29 30 28 28 60
Last Retrain/Reneg Status.... None
Last Retrain/Reneg Reason.... None
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 31 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......... 9,4
Last Rx/Tx State............. 67/67
Energy at 3750Hz/Average .... 3839/3563
Auto Gain Amplitude, db...... 10
Detection of 120 Hz Tones.... Yes
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.. 1/3
Frames Errors, Rx/Tx......... 3/7 (11,1%/7,0%)
Frames Count, Rx/Tx.......... 27/100
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 8
Error Control Link NAKs...... 7
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 316
Characters Sent.............. 4340
Average CPS, Rx/Tx........... 9/124
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 56

и очень часто идут залипания при приеме данных скорее падает качесево линии , и поэтому работа в таком режиме бывает хуже чем при V.34
подскажите может чтото надо подстроить чтобы связь стала лутше и какой протокол предподчтительне.

[Technical Support]

Судить о работе V.90 по 30-секундной статистике невозможно. Впишите команду:

S210.7=1 S91=15

в строку инициализации и соберите статистику за 10 минут работы. Затем соберите статистику работы на V.34 (для сравнения). Чтобы перейти на V.34, добавьте +MS=11 в конец строки инициализации.
_________________
Inpro
Technical Support

[AlexAka]

прописал как просили вот статистика
V.90


Inpro IDC Modems Diagnostics, Version 1.0.1.30
01.04.2003 20:09:36 - Direct Log Write Entry
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:11:48
Termination Reason........... RETRAIN FAILURE
Tx Rate (Last/Init/Min/Max).. 26400/26400/26400/28800 bps
Rx Rate (Last/Init/Min/Max).. 29333/37333/29333/37333 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 127
Tx/Power Drop/Rx Level....... 15/0/NA
SNR Last/Min/Max............. 36/34/41
Highest Rx/Tx State.......... 67/67
EQM Sum...................... 0142
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 2/10/1
Renegs Issued/Granted........ 12/1
FForwards/FBacks/Denied...... 1/12/0
Forced FB/FB after FF/MaxREJ. 9/1/11
Last dialed number........... P7284001
V90 9481834246E0


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 127/11/127
EQM Hits..................... 0
EQM Last 10 Readings......... 126 126 20 22 26 25 27 23 22 28
Last Retrain/Reneg Status.... Local Retrain
Last Retrain/Reneg Reason.... Remote Retrain
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 31 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....... 1
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 8,8
Last Rx/Tx State............. 21/20
Energy at 3750Hz/Average .... 9315/4095
Auto Gain Amplitude, db...... 10
Detection of 120 Hz Tones.... Yes
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
Workaround Used.............. V90 Phase 2 Escape
Workaround Used.............. V34 Codex WA/V34 Stuck Phase2
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 43/159
Frames Errors, Rx/Tx......... 159/40 (3,6%/1,4%)
Frames Count, Rx/Tx.......... 4413/2784
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 218
Error Control Link NAKs...... 40
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 228367
Characters Sent.............. 55825
Average CPS, Rx/Tx........... 322/78
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 88


v.34
Inpro IDC Modems Diagnostics, Version 1.0.1.30
01.04.2003 19:54:22 - Direct Log Write Entry
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:13:08
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 28800/26400/26400/28800 bps
Rx Rate (Last/Init/Min/Max).. 31200/33600/31200/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 35
Tx/Power Drop/Rx Level....... 15/0/27
SNR Last/Min/Max............. 41/39/41
Highest Rx/Tx State.......... 85/87
EQM Sum...................... 0036
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/1/0
Renegs Issued/Granted........ 6/0
FForwards/FBacks/Denied...... 3/3/0
Forced FB/FB after FF/MaxREJ. 3/1/9
Last dialed number........... P7191479
Flex fail 9481834347EB


Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 35/28/62
EQM Hits..................... 0
EQM Last 10 Readings......... 34 34 35 35 33 33 41 38 36 38
Last Retrain/Reneg Status.... Local Rate Renegotiation
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Reason for V.34 Fallback..... Data Pump decision to Fallback in Phase 2
Last Retrain/Reneg Time...... 8 minutes ago
Handshake Time/Retries....... 24 seconds/0
Non-linear Encoding, Rx/Tx... ON/ON
Precoding, Rx/Tx............. ON/ON
Shaping, Rx/Tx............... ON/ON
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 0
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 7,5
Last Rx/Tx State............. 85/87
Energy at 3750Hz/Average .... 596/713
Detection of 120 Hz Tones.... Yes
Detection of Dual PCM........ Yes
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....... 03
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...... Unknown
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 2/75
Frames Errors, Rx/Tx......... 75/228 (0,8%/5,3%)
Frames Count, Rx/Tx.......... 9241/4280
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 150
Error Control Link NAKs...... 228
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 1269049
Characters Sent.............. 114276
Average CPS, Rx/Tx........... 1610/145
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 68

[Technical Support]

Скорее всего, Вы сможете добиться лучших результатов на V.34. Однако попробовать побороться за V.90 можно. Для начала Вам нужно избавиться от перетренировок, инициированных удалённым модемом. Это можно сделать, ограничив скорость передачи. Добавьте в строку инициализации команду:

+MS=12,,,,,,24000

Если перетренировки не исчезнут, то "ограничитель" нужно двигать вниз (на 21600 или ещё ниже). Когда избавитесь от перетренировок, соберите статистику V.90 ещё раз.

Кстати, перетренировка была и на V.34. Избавляться аналогичным образом (только вместо 12 в команде +MS нужно записать 11).
_________________
Inpro
Technical Support