Помогите настроить IDC 5614

[Dmitry]

Уважаемый, техсаппорт.
Помогите настроить модем. Линия подключена к цифровой АТС, но коннектится не выше чем на 48000, да и CPS при этом слабоват.

Строка инициализации:
S91=15 S210.7=1 S17=60 S55.4=1

Вот статистика:

Inpro IDC 2814/5614 BXL/VR Diagnostics, Version 1.0.1.29
13.08.2003 8:24:25 - Outbound Call by Remote Access
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 05:23:33
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 31200/31200/28800/31200 bps
Rx Rate (Last/Init/Min/Max).. 31200/48000/31200/50667 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 19
Tx/Power Drop/Rx Level....... 15/0/18
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 0015
RBS Pattern.................. 00
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 1/6/0
Renegs Issued/Granted........ 111/1
FForwards/FBacks/Denied...... 21/91/0
Forced FB/FB after FF/MaxREJ. 86/53/11
Last dialed number........... P2379619
Flex fail 9481834347E0


Symbol Rate.................. 3429
Carrier Frequency Hz, Tx..... 1959
EQM Value (Last/Min/Max)..... 19/7/127
EQM Hits..................... 0
EQM Last 10 Readings......... 18 126 126 127 127 127 127 125 127 127
Last Retrain/Reneg Status.... Local Retrain
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Reason for V.34 Fallback..... Data Pump decision to Fallback
Last Retrain/Reneg Time...... 0 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......... 1,7
Last Rx/Tx State............. 67/67
Energy at 3750Hz/Average .... 5082/1730
Auto Gain Amplitude, db...... 10
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....... 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
Workaround Used.............. Reserved Value
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/77
Frames Errors, Rx/Tx......... 6477/276 (1,2%/0,2%)
Frames Count, Rx/Tx.......... 555881/158429
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 28
Error Control Link NAKs...... 20
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 60217424
Characters Sent.............. 6347138
Average CPS, Rx/Tx........... 3101/326
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 61



И вот более ранняя статистика с тем же провайдером:

Inpro IDC 2814/5614 BXL/VR Diagnostics, Version 1.0.1.29
31.07.2003 8:00:09 - Outbound Call by Remote Access
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 04:58:03
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 31200/31200/31200/31200 bps
Rx Rate (Last/Init/Min/Max).. 41333/50667/36000/50667 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 35
Tx/Power Drop/Rx Level....... 15/1/16
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 008A
RBS Pattern.................. 00
Rate Drop.................... 1
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 0/1/1
Renegs Issued/Granted........ 81/0
FForwards/FBacks/Denied...... 11/70/0
Forced FB/FB after FF/MaxREJ. 70/58/11
Last dialed number........... P2379619
V90 9481834347E0


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 35/6/127
EQM Hits..................... 0
EQM Last 10 Readings......... 31 31 31 33 31 36 31 36 31 29
Last Retrain/Reneg Status.... Local Rate Renegotiation
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Last Retrain/Reneg Time...... 24 minutes ago
Handshake Time/Retries....... 28 seconds/0
Non-linear Encoding, Rx/Tx... OFF/ON
Precoding, Rx/Tx............. OFF/ON
Shaping, Rx/Tx............... OFF/ON
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 2
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 2,3
Last Rx/Tx State............. 67/87
Energy at 3750Hz/Average .... 4946/1691
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........... 53333 bps (Reg.S120=20)
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.. 1/228
Frames Errors, Rx/Tx......... 6628/169 (1,4%/0,1%)
Frames Count, Rx/Tx.......... 460363/133987
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 252
Error Control Link NAKs...... 169
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 48774426
Characters Sent.............. 5295886
Average CPS, Rx/Tx........... 2727/296
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 59


Можно ли что то с этим сделать?

Всего наилучшего.

[Technical Support]

Кажется, на Вашей линии время от времени бушуют бури. Именно они заставляют и Ваш, и удалённый модем выполнять перетренировки, и именно они заставили модем перейти на V.34 в первой статистике.

Давайте попробуем задать такую строчку инициализации:

M4 S91=15 S210.7=1 S17=60 S55.4=1 +MS=,,,44000,,,26400

и посмотрим, что получается. Особенно интересуют Ваши впечатления от звуков при перетренировках. Нет ли каких-нибудь странных посторонних шумов, треска, "булькания"?
_________________
Inpro
Technical Support

[Dmitry]

В звуках перетренировок, которые слышны во время связи модема, ничего необычного не слышно.


Ну вот что выщло с новой строкой инициализаци:

Inpro IDC 2814/5614 BXL/VR Diagnostics, Version 1.0.1.29
17.08.2003 4:12:04 - Outbound Call by Remote Access
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 01:11:13
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 26400/26400/26400/26400 bps
Rx Rate (Last/Init/Min/Max).. 42667/44000/41333/44000 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 11
Tx/Power Drop/Rx Level....... 15/0/16
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 00AF
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 15/0
FForwards/FBacks/Denied...... 1/14/0
Forced FB/FB after FF/MaxREJ. 13/6/10
Last dialed number........... P2898939
V90 9481834347E8


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 11/8/91
EQM Hits..................... 0
EQM Last 10 Readings......... 9 11 10 10 11 10 11 11 11 11
Last Retrain/Reneg Status.... Local Fast Retrain
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Last Retrain/Reneg Time...... 4 minutes ago
Handshake Time/Retries....... 26 seconds/0
Non-linear Encoding, Rx/Tx... OFF/ON
Precoding, Rx/Tx............. OFF/ON
Shaping, Rx/Tx............... OFF/ON
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 2
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 2,6
Last Rx/Tx State............. 67/87
Energy at 3750Hz/Average .... 5059/1713
Auto Gain Amplitude, db...... 10
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....... 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.. 1/251
Frames Errors, Rx/Tx......... 1275/22 (1,2%/0,1%)
Frames Count, Rx/Tx.......... 109484/35775
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 27
Error Control Link NAKs...... 22
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 12746356
Characters Sent.............. 688096
Average CPS, Rx/Tx........... 2982/161
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 59


А нельзя ли увеличить устойчивую связь на более высоких скоростях? И стоит ли в подборе строки инициализации бороться за параметр Line quality, чтобы он поменьше был? :)

Спасибо.

[Technical Support]

[Dmitry]

А почему у вас вышло S210=157? Если мы только выставим 7 и 4 бит в 1, то получаем 144.

[Dmitry]

Я не заметил значения по умолчанию для битов 1-4. Теперь все понятно.

[Dmitry]

Можно ли такую работу назвать стабильной:

Inpro IDC 2814/5614 BXL/VR Diagnostics, Version 1.0.1.29
19.08.2003 8:59:57 - Outbound Call by Remote Access
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:59:45
Termination Reason........... LINK DISCONNECT
Tx Rate (Last/Init/Min/Max).. 26400/26400/26400/26400 bps
Rx Rate (Last/Init/Min/Max).. 44000/42667/42667/44000 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 21
Tx/Power Drop/Rx Level....... 15/0/16
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 00B3
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
Last dialed number........... P2898939
V90 9481834347E8


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 21/9/58
EQM Hits..................... 0
EQM Last 10 Readings......... 21 20 22 20 20 22 21 20 22 20
Last Retrain/Reneg Status.... Local Fast Retrain
Last Retrain/Reneg Reason.... Local Fallforward due to Low EQM
Last Retrain/Reneg Time...... 59 minutes ago
Handshake Time/Retries....... 27 seconds/0
Non-linear Encoding, Rx/Tx... OFF/ON
Precoding, Rx/Tx............. OFF/ON
Shaping, Rx/Tx............... OFF/ON
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 2
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 1,9
Last Rx/Tx State............. 67/87
Energy at 3750Hz/Average .... 5051/1710
Auto Gain Amplitude, db...... 10
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........... 42667 bps (Reg.S120=12)
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:T UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/67
Frames Errors, Rx/Tx......... 579/48 (0,6%/0,1%)
Frames Count, Rx/Tx.......... 97993/35298
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 15
Error Control Link NAKs...... 48
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 11747675
Characters Sent.............. 866472
Average CPS, Rx/Tx........... 3276/241
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 59


Что вообще будет являться критерием стабильности работы модема? Отсутствие перетренировок?

А не нужно например поиграть с чувствительностью приемника?

[Technical Support]

Да, это весьма стабильная работа. Что же касается критериев, то в Вашем случае их два:

1. Процент сбойных кадров на приёме:

Frames Errors, Rx/Tx......... 579/48 (0,6%/0,1%)

Конечно, этот критерий "работает" только при существенной загрузке канала на приём (например, Вы качаете какой-нибудь архив).

2. Отсутствие перетренировок. Нечастые пересогласования скорости вполне допустимы.

Удовлетворите любопытство: что такое происходило при повышении порога ограничения скорости до 45333, что Вас заставило вернуться на 44000 ?

[Dmitry]

[Technical Support]

[Dmitry]

Сейчас строка такая:
M4 S91=15 S210=157 S17=60 S55.4=1 +MS=,,,53333,,,26400

Можно поднимать и дальше планку, но соединение почему то происходит всегда не выше 48000, стоит ли ее оставлять такой или поднимать? Может имеет смысл добавить агрессивности модему? :)

Вот статистика:

Inpro IDC 2814/5614 BXL/VR Diagnostics, Version 1.0.1.29
21.08.2003 7:58:48 - Outbound Call by Remote Access
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:31:01
Termination Reason........... LINK DISCONNECT
Tx Rate (Last/Init/Min/Max).. 26400/26400/26400/26400 bps
Rx Rate (Last/Init/Min/Max).. 52000/48000/48000/52000 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 55
Tx/Power Drop/Rx Level....... 15/0/16
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 00AE
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 5/0
FForwards/FBacks/Denied...... 3/2/0
Forced FB/FB after FF/MaxREJ. 0/0/0
Last dialed number........... P2898939
V90 9481834347E5


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 55/17/107
EQM Hits..................... 0
EQM Last 10 Readings......... 51 53 51 49 48 46 45 47 48 45
Last Retrain/Reneg Status.... Local Fast Retrain
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Last Retrain/Reneg Time...... 3 minutes ago
Handshake Time/Retries....... 23 seconds/0
Non-linear Encoding, Rx/Tx... OFF/ON
Precoding, Rx/Tx............. OFF/ON
Shaping, Rx/Tx............... OFF/ON
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 3
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 1,9
Last Rx/Tx State............. 67/87
Energy at 3750Hz/Average .... 5110/1725
Auto Gain Amplitude, db...... 10
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....... 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:T UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/85
Frames Errors, Rx/Tx......... 1109/21 (2,3%/0,1%)
Frames Count, Rx/Tx.......... 48220/16888
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 23
Error Control Link NAKs...... 21
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 4652686
Characters Sent.............. 508655
Average CPS, Rx/Tx........... 2500/273
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 59


И еще одна:

Inpro IDC 2814/5614 BXL/VR Diagnostics, Version 1.0.1.29
21.08.2003 8:58:41 - Outbound Call by Remote Access
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:59:06
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 26400/26400/26400/26400 bps
Rx Rate (Last/Init/Min/Max).. 46667/48000/46667/48000 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 29
Tx/Power Drop/Rx Level....... 15/0/16
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 00AB
RBS Pattern.................. 00
Rate Drop.................... 0
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 1/0
FForwards/FBacks/Denied...... 0/1/0
Forced FB/FB after FF/MaxREJ. 0/0/0
Last dialed number........... P2898939
V90 9481834347E8


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 29/23/119
EQM Hits..................... 0
EQM Last 10 Readings......... 32 30 30 36 35 31 32 33 27 33
Last Retrain/Reneg Status.... Local Rate Renegotiation
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Last Retrain/Reneg Time...... 59 minutes ago
Handshake Time/Retries....... 23 seconds/0
Non-linear Encoding, Rx/Tx... OFF/ON
Precoding, Rx/Tx............. OFF/ON
Shaping, Rx/Tx............... OFF/ON
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 2
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 3,2
Last Rx/Tx State............. 67/87
Energy at 3750Hz/Average .... 5051/1710
Auto Gain Amplitude, db...... 10
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....... 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.. 1/122
Frames Errors, Rx/Tx......... 1402/76 (1,1%/0,2%)
Frames Count, Rx/Tx.......... 129959/42264
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 22
Error Control Link NAKs...... 76
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 15811740
Characters Sent.............. 823358
Average CPS, Rx/Tx........... 4459/232
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 59

[Technical Support]

Судя по статистике, ограничитель нужно выставлять на 50667 бит/с. Что же касается агрессивности, то её поднимать не стоит - при надобности модем сам поднимется выше 48000, как это и случилось в данном случае:

Rx Rate (Last/Init/Min/Max).. 52000/48000/48000/52000 bps
_________________
Inpro
Technical Support

[Dmitry]

Спасибо за рекомендации, не очень правда ясно почему средний CPS не доходит даже до 5к, хотя загрузка канала была максимальной, старался загрузить по полной, да и индикатор Rx практически все время горел.

[Technical Support]

IDC Diagnostics пользуется простейшим алгоритмом подсчёта CPS:

CPS = NoOfBytes / Time

Давайте вместе посчитаем: