Постоянные ретрейны

[Sly]

Посоветуйте пожалуйста что можно сделать,
Line Quality меняется от 15 до 130, в среднем 40

Inpro IDC Modems Diagnostics, Version 1.0.1.30
09.02.03 13:35:50 -
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 06:37:29
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 12000/26400/12000/28800 bps
Rx Rate (Last/Init/Min/Max).. 9600/30667/ 9600/38667 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 126
Tx/Power Drop/Rx Level....... 9/0/40
SNR Last/Min/Max............. 24/5/43
Highest Rx/Tx State.......... 67/67
EQM Sum...................... 03D9
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. None
Retrains Issued/Granted/Auto. 14/2/31
Renegs Issued/Granted........ 79/11
FForwards/FBacks/Denied...... 38/55/1
Forced FB/FB after FF/MaxREJ. 0/6/7
Last dialed number........... P3262451
Flex fail


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 126/5/127
EQM Hits..................... 0
EQM Last 10 Readings......... 126 7 5 8 6 10 74 7 5 37
Last Retrain/Reneg Status.... Remote Retrain
Last Retrain/Reneg Reason.... Remote Retrain
Reason for V.34 Fallback..... Data Pump decision to Fallback in Phase 2
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 22 seconds/0
Non-linear Encoding, Rx/Tx... OFF/OFF
Precoding, Rx/Tx............. ON/OFF
Shaping, Rx/Tx............... ON/OFF
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 6
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 2,3
Last Rx/Tx State............. 67/67
Energy at 3750Hz/Average .... 2482/302
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........... 32000 bps (Reg.S120=4)
V.8 Negotiation Started...... Yes
V.8bis Success............... No
V.8bis CRe,CRd,CL,MS,ACK,NAK. No/No/No/No/No/No
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.. 1/243
Frames Errors, Rx/Tx......... 243/628 (0,3%/0,7%)
Frames Count, Rx/Tx.......... 81849/83830
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 117
Error Control Link NAKs...... 116
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 2709653
Characters Sent.............. 2754361
Average CPS, Rx/Tx........... 113/115
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 64

[Technical Support]

Начинать нужно с перехода на V.34. Пропишите строку инициализации в свойствах модема:

S91=12 S210.7=1 +MS=11

и пересоберите статистику.
_________________
Inpro
Technical Support

[Sly]

Вот статистика после Вашего совета, можно ли ещё улучшить качество связи?


Inpro IDC Modems Diagnostics, Version 1.0.1.30
09.02.03 22:09:20 - Outbound Call by Remote Access
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 03:39:56
Termination Reason........... LINK DISCONNECT
Tx Rate (Last/Init/Min/Max).. 26400/26400/21600/31200 bps
Rx Rate (Last/Init/Min/Max).. 33600/33600/21600/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 28
Tx/Power Drop/Rx Level....... 12/0/24
SNR Last/Min/Max............. 36/34/37
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 002A
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 5/21/0
Renegs Issued/Granted........ 85/15
FForwards/FBacks/Denied...... 40/50/0
Forced FB/FB after FF/MaxREJ. 17/3/10
Last dialed number........... P3262451
Flex fail


Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 28/1/127
EQM Hits..................... 0
EQM Last 10 Readings......... 32 34 31 30 29 44 30 32 30 29
Last Retrain/Reneg Status.... Remote Retrain
Last Retrain/Reneg Reason.... Remote Retrain
Last Retrain/Reneg Time...... 1 minutes ago
Handshake Time/Retries....... 19 seconds/0
Non-linear Encoding, Rx/Tx... ON/OFF
Precoding, Rx/Tx............. ON/OFF
Shaping, Rx/Tx............... ON/OFF
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 7
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 5,5
Last Rx/Tx State............. 67/67
Energy at 3750Hz/Average .... 949/483
V.8 Negotiation Started...... Yes
V.8bis Success............... Yes
V.8bis CRe,CRd,CL,MS,ACK,NAK. Yes/No/Yes/No/Yes/No
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. ADP:R ODP:T
Error Correction Status Byte. SYNC UA:T UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/41
Frames Errors, Rx/Tx......... 1577/293 (0,8%/0,3%)
Frames Count, Rx/Tx.......... 193401/88923
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 214
Error Control Link NAKs...... 37
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 24249605
Characters Sent.............. 2482735
Average CPS, Rx/Tx........... 1837/188
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 60

[Technical Support]

Можно попробовать:

1. Заменить команду +MS=11 на +MS=11,,,,,,21600. Это должно отучить удалённый модем от перетренировок.

2. Добавить S55.3=1. Может уменьшить количество пересогласований/перетренировок Вашего модема.

Следует отметить, что полученная статистика уже весьма неплохая. Поэтому особенно ощутимых улучшений ждать не стоит.
_________________
Inpro
Technical Support