настройка быстрого коннекта

[Vlad]

прошивка 3.14, s17=32, s91=15. При s17=72 коннект происходит на 46k, затем идет подъем на 49-50k

1.

Unimodem Diagnostics/2, version 1.1.0.1, compiled at Nov 20 2002 22:29:56
(c) 2000 Stanislav V. Mekhanoshin (rampitec@tu.spb.ru, 2:5030/172.9@fidonet)
----------------------------------------------------------------------------
Diag Command Specification rev.: 1.0
Call Setup Result code : Data Answering signal detected
Multi-media mode : Data Only
DTE-DCE interface mode : Async data
TX/RX signal power level, -dBm : 16/18
Estimated noise level, -dBm : 61
TX/RX Negotiation : V.34/V.90 Issue 1 (asymmetric)
TX/RX Symbol Rate : 3200/8000
TX/RX Carrier frequency, Hz : 1829/0
TX data rate (Last/Init) : 28800/28800
RX data rate (Last/Init) : 49333/53333
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 3
Retrains Requested/Granted : 0/0
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 13
Error control NAKs received : 0
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 1688329/28755490
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 41583/224139
TX/RX I-Frame error count : 0/709
Termination Cause : cct108 turned Off

Rockwell Diagnostics/W32, version 1.3.0.0, compiled at Jun 13 2002 22:35:24
(c) 2000 Stanislav V. Mekhanoshin (rampitec@tu.spb.ru, 2:5030/172.9@fidonet)
----------------------------------------------------------------------------
Connection time : 01:38:33
TX Rate (Last/Init/Min/Max) : 28800/28800/28800/28800
RX Rate (Last/Init/Min/Max) : 49333/53333/49333/53333
Modulation/Protocol/Compression : V.90/LAPM/V.42bis
TX Symbol rate : 3200
Signal Level (TX/Power Drop), -dB : 15/1
RX Signal Level (Last/Min/Max), -dB : 16/16/16
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 6.938
EQM Value (Last/Min/Max/Negative) : 32/13/53/0
EQM Samples Running Sum : 0043
EQM Last 10 Readings : 34 35 36 34 40 38 35 37 37 37
SNR Ratio (Last/Min/Max), dB : 44/44/44
TX Non-linear Encoding : ON
TX Precoding : ON
TX/RX Constellation Shaping : ON/OFF
TX Trellis Encoding : 16 state
TX Pre-emphasis : 2
TX/RX state (Max TX/RX, Last TX/RX) : 87H/67H, 67H/87H
Dual PCM/120 Hz detection : No/No
Energy at 3750Hz/Average Energy : 1880/1440
RBS Pattern/Alternating RBS Pattern : 00/NA
V.90 Digital Pad/A-law/HighPowerSrv : 0dB/No/No
Retrains (Issued/Granted/Fast) : 0/0/0
Renegs (Issued/Granted) : 3/0
Retrans per frame/Frames rejected : 1/197
Last Retrain/Reneg reason : Fall-back due to high EQM
Disconnect reason : LOCAL REQUEST
Remote Manufacturer/Licensee Code : Conexant/Conexant
Remote Manufacturer's Product Caps : K56Flex, V.90
Remote V.8bis caps (type) : Digital (Server)
Remote V.8bis caps (K56Flex mode) : K56Flex prototype mode not supported
Remote V.8bis caps (K56Flex version): 1.0, 1.1
Remote K56Flex RAM version supported: 71
Remote Coding used/forced by server : A-law/Yes
Remote controller version number : 11
Remote supports symbol rate (1,2,5) : 2743:ON 2800:ON 3429:ON 3429-TX:ON
Remote supports symbol rate (3,4) : 3000-L:ON 3000-H:ON 3200-L:ON 3200-H:ON
Remote power drop support : ON
Remote max symbol rate difference : 0 steps
Remote is a CME modem : No
Remote supports V.34bis : Yes
Remote frequency source : ITU-reserved
Remote is ITU/K56Flex neg/High IMD : Yes/Yes/No
V.8 bis CRe detected/early : Yes/No


2.

Unimodem Diagnostics/2, version 1.1.0.1, compiled at Nov 20 2002 22:29:56
(c) 2000 Stanislav V. Mekhanoshin (rampitec@tu.spb.ru, 2:5030/172.9@fidonet)
----------------------------------------------------------------------------
Diag Command Specification rev.: 1.0
Call Setup Result code : Data Answering signal detected
Multi-media mode : Data Only
DTE-DCE interface mode : Async data
TX/RX signal power level, -dBm : 16/15
Estimated noise level, -dBm : 58
TX/RX Negotiation : V.34/V.90 Issue 1 (asymmetric)
TX/RX Symbol Rate : 3200/8000
TX/RX Carrier frequency, Hz : 1829/0
TX data rate (Last/Init) : 28800/28800
RX data rate (Last/Init) : 53333/53333
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 1
Retrains Requested/Granted : 7/0
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 7
Error control NAKs received : 1
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 58741/104297
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 477/686
TX/RX I-Frame error count : 1/19
Termination Cause : cct108 turned Off

Rockwell Diagnostics/W32, version 1.3.0.0, compiled at Jun 13 2002 22:35:24
(c) 2000 Stanislav V. Mekhanoshin (rampitec@tu.spb.ru, 2:5030/172.9@fidonet)
----------------------------------------------------------------------------
Connection time : 00:02:27
TX Rate (Last/Init/Min/Max) : 28800/28800/26400/28800
RX Rate (Last/Init/Min/Max) : 53333/53333/53333/54667
Modulation/Protocol/Compression : V.90/LAPM/V.42bis
TX Symbol rate : 3200
Signal Level (TX/Power Drop), -dB : 15/1
RX Signal Level (Last/Min/Max), -dB : 14/16/14
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 6.938
EQM Value (Last/Min/Max/Negative) : 96/27/127/0
EQM Samples Running Sum : 0045
EQM Last 10 Readings : 127 127 101 30 33 30 45 32 126 126
SNR Ratio (Last/Min/Max), dB : 44/44/44
TX Non-linear Encoding : ON
TX Precoding : ON
TX/RX Constellation Shaping : ON/OFF
TX Trellis Encoding : 16 state
TX Pre-emphasis : 1
TX/RX state (Max TX/RX, Last TX/RX) : 87H/67H, 00H/67H
Dual PCM/120 Hz detection : No/No
Energy at 3750Hz/Average Energy : 1813/1392
RBS Pattern/Alternating RBS Pattern : 00/NA
V.90 Digital Pad/A-law/HighPowerSrv : 0dB/Yes/No
Retrains (Issued/Granted/Fast) : 7/0/0
Renegs (Issued/Granted) : 0/1
Retrans per frame/Frames rejected : 3/19
Last Retrain/Reneg reason : Fall-back due to high EQM
Disconnect reason : NO REMOTE RESPONSE
Remote Manufacturer/Licensee Code : Conexant/Conexant
Remote Manufacturer's Product Caps : K56Flex, V.90
Remote V.8bis caps (type) : Digital (Server)
Remote V.8bis caps (K56Flex mode) : K56Flex prototype mode not supported
Remote V.8bis caps (K56Flex version): 1.0, 1.1
Remote K56Flex RAM version supported: 71
Remote Coding used/forced by server : A-law/Yes
Remote controller version number : 11
Remote supports symbol rate (1,2,5) : 2743:ON 2800:ON 3429:ON 3429-TX:ON
Remote supports symbol rate (3,4) : 3000-L:ON 3000-H:ON 3200-L:ON 3200-H:ON
Remote power drop support : ON
Remote max symbol rate difference : 0 steps
Remote is a CME modem : No
Remote supports V.34bis : Yes
Remote frequency source : ITU-reserved
Remote is ITU/K56Flex neg/High IMD : Yes/Yes/No
V.8 bis CRe detected/early : Yes/No


В случае 2. шли постоянные ретрейны.
Какое значение s17 будет оптимальным в моем случае? Какие еще параметры можно подкрутить?

[Technical Support]

В случае 1 соединение было на 53333 и затем модем "упал" на 49333:

RX Rate (Last/Init/Min/Max) : 49333/53333/49333/53333
Renegs (Issued/Granted) : 3/0

Скорее всего, это произошло в самом начале сессии. Более точно определить не можем, поскольку Вы пользуетесь довольно устарелой версией 3.14 (кстати, почему?), и отсутствием статистики at%s. В любом случае, сценарий был отличным от описываемого Вами "при s17=72 коннект происходит на 46k, затем идет подъем на 49-50k".

В случае 2 перетренировки возникли из-за маленького значения S17 (слишком высокой агрессивности). В более поздних версиях есть механизмы борьбы с этим явлением.
_________________
Inpro
Technical Support

[Vlad]

в случае 1. модем держался на 52-53k около получаса судя по скорости скачивания архива.
какая есть еще последняя версия прошивки кроме 2.23? ветка версии 3.x больше не поддерживатся вами?
пока поставил агрессивность s17=48. стало по-стабильнее.

[Peter Stoliarov]

[Technical Support]