Подскажите, пожалуйста, что можно улучшить.

[Интернетчик]

Вот статистика, после обрыва связи.

Inpro IDC 2814/5614 BXL/VR Diagnostics, Version 1.0.1.30
06.03.2004 21:51:40 - Outbound Call by RemoteAccess
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:16:17
Termination Reason........... RETRAIN FAILURE
Tx Rate (Last/Init/Min/Max).. 28800/28800/16800/31200 bps
Rx Rate (Last/Init/Min/Max).. 37333/38667/33333/38667 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 126
Tx/Power Drop/Rx Level....... 15/2/NA
SNR Last/Min/Max............. 32/32/43
Highest Rx/Tx State.......... 67/67
EQM Sum...................... 010E
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 7/0/5
Renegs Issued/Granted........ 9/1
FForwards/FBacks/Denied...... 6/10/1
Forced FB/FB after FF/MaxREJ. 0/1/4
Last dialed number........... PP8W8091231313
V90 9481834246E0

Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1920
EQM Value (Last/Min/Max)..... 126/15/127
EQM Hits..................... 0
EQM Last 10 Readings......... 126 125 127 127 127 127 125 127 127 124
Last Retrain/Reneg Status.... Local Retrain
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Last Retrain/Reneg Time...... 1 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......... 2,6
Last Rx/Tx State............. 21/21
Energy at 3750Hz/Average .... 19616/4085
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........... 36000 bps (Reg.S120=7)
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...... External
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.. 7/36
Frames Errors, Rx/Tx......... 36/10 (0,7%/0,5%)
Frames Count, Rx/Tx.......... 5278/1946
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 28
Error Control Link NAKs...... 10
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 541082
Characters Sent.............. 173029
Average CPS, Rx/Tx........... 553/177
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 84


Подскажите, пожалуйста, что можно сделать чтобы улучшить качество связи??

[Technical Support]

Отказываться нужно от V.90 на Вашей линии связи. Пропишите такую строчку инициализации (в свойствах модема в Windows):

S91=15 S210.7=1 +MS=11
_________________
Inpro
Technical Support

[Alex01]

Почему не происходит соединение на V.90, что можно подкрутить?

Inpro IDC Modems Diagnostics, Version 1.0.2.33
19.03.2004 17:13:54 - Outbound Call by RemoteAccess
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.24

Time Online.................. 00:01:57
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 33600/33600/33600/33600 bps
Rx Rate (Last/Init/Min/Max).. 33600/33600/33600/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 45
Tx/Power Drop/Rx Level....... 15/2/22
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/67
EQM Sum...................... 0037
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 0/0
FForwards/FBacks/Denied...... 0/0/0
Forced FB/FB after FF/MaxREJ. 0/0/3
Last dialed number........... PXXXXXXX
Flex fail 9481834347EB

Negotiation Result (Rx/Tx)... V.34/V.34
Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 45/37/52
EQM Hits..................... 0
EQM Last 10 Readings......... 44 45 42 41 38 45 44 46 43 46
Last Retrain/Reneg Status.... None
Last Retrain/Reneg Reason.... None
Reason for V.34 Fallback..... Data Pump decision to Fallback in Phase 2
Last Retrain/Reneg Time...... 1 minutes ago
Handshake Time/Retries....... 28 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....... 2
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 3,7
Last Rx/Tx State............. 67/67
Energy at 3750Hz/Average .... 1275/1423
AGC Gain (Last/Min/Max)...... 81/81/81
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.. 1/7
Frames Errors, Rx/Tx......... 7/3 (0,5%/0,3%)
Frames Count, Rx/Tx.......... 1352/874
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 2
Error Control Link NAKs...... 3
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 304 273
Characters Sent.............. 52 883
Average CPS, Rx/Tx........... 2600/451
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 65

[Technical Support]

Соединение на V.90 не происходит потому, что модем обнаружил двойное преобразование аналог-цифра:

Detection of Dual PCM........ Yes

Вы можете попробовать запретить переход на V.34 по обнаружению dual PCM, установив S202.5=1. Однако, скорее всего, это не приведёт к увеличению производительности работы модема (и даже наоборот, вполне может оказаться, что получаемые Вами на протоколе V.90 результаты будут хуже, чем на V.34).
_________________
Inpro
Technical Support