IDC-5614BXL/VR Plus

[savl]

Добрый День.
У меня модем IDC-5614BXL/VR Plus . Часто модему не удается соединится с провайдером - "удаленный модем не отвечает" и низкая скорость коннекта.
Подскажите, какие еще строчки прописать?
S38=0+MS=11,,21600,33600;:

ati6
RCV56DPF-PLL L8571A Rev 43.07/43.07
OK
ati3
IDC-5614BXL/VR firmware by Mike Telis, V2.23-V90_2M_DLS
Copyright (c) Inpro, 1998-2003


Привожу тестовые подключения:

1-й пул:
Unimodem Diagnostics/W32, version 1.1.0.1, compiled at Nov 20 2002 22:29:14
(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 : 11/28
Estimated noise level, -dBm : 64
TX/RX Negotiation : V.34/V.34
TX/RX Symbol Rate : 3429/3429
TX/RX Carrier frequency, Hz : 1959/1959
TX data rate (Last/Init) : 28800/28800
RX data rate (Last/Init) : 24000/31200
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 9
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 : 23
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 79135/1902956
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 3183/14289
TX/RX I-Frame error count : 23/154
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 : 00:11:29
Handshake Time/Retries : 19 sec/0
TX Rate (Last/Init/Min/Max) : 28800/28800/26400/28800
RX Rate (Last/Init/Min/Max) : 24000/31200/24000/31200
Modulation/Protocol/Compression : V.34/LAPM/V.42bis
TX Symbol rate : 3429
TX/RX carrier frequency, Hz : 1959/1959
Signal Level (TX/Power Drop), -dB : 9/2
RX Signal Level (Last/Min/Max), -dB : 28/28/27
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 5.499
EQM Value (Last/Min/Max/Negative) : 37/13/127/0
EQM Samples Running Sum : 0048
EQM Last 10 Readings : 31 34 37 36 33 34 32 34 36 38
SNR Ratio (Last/Min/Max), dB : 36/34/36
TX/RX Non-linear Encoding : ON/ON
TX/RX Precoding : ON/ON
TX/RX Constellation Shaping : ON/ON
TX Trellis Encoding : 16 state
TX Pre-emphasis : 3
TX/RX state (Max TX/RX, Last TX/RX) : 87H/85H, 87H/85H
Error Correction Status : ODP:T ADP:R SABME:T UA:R XID:T,R SYNC
Energy at 3750Hz/Average Energy : 1004/785
Retrains (Issued/Granted/Fast) : 0/0/0
Renegs (Issued/Granted) : 8/1
Retrans per frame/Frames rejected : 1/154
Total number of REJ sent/received : 154/23
Last Retrain/Reneg reason : Fall-back due to high EQM
Last Retrain/Reneg requested : Local Rate Renegotiation
Minutes Since Last Retrain/Reneg : 3
Disconnect reason : LOCAL REQUEST
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 : Internal
CRe/CRd/CL/MS/ACK/NAK received : Yes/No/Yes/No/Yes/No
V.8bis success/V.8bis neg started : Yes/Yes


2-й пул:
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 : 00:03:33
Handshake Time/Retries : 18 sec/0
TX Rate (Last/Init/Min/Max) : 24000/24000/24000/24000
RX Rate (Last/Init/Min/Max) : 21600/26400/21600/28800
Modulation/Protocol/Compression : V.34/LAPM/V.42bis
TX Symbol rate : 3429
TX/RX carrier frequency, Hz : 1959/1959
Signal Level (TX/Power Drop), -dB : 9/1
RX Signal Level (Last/Min/Max), -dB : 27/27/27
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 6.374
EQM Value (Last/Min/Max/Negative) : 87/16/127/0
EQM Samples Running Sum : 00B9
EQM Last 10 Readings : 84 87 99 84 89 126 127 127 126 126
SNR Ratio (Last/Min/Max), dB : 34/31/34
TX/RX Non-linear Encoding : ON/ON
TX/RX Precoding : ON/ON
TX/RX Constellation Shaping : ON/ON
TX Trellis Encoding : 16 state
TX Pre-emphasis : 2
TX/RX state (Max TX/RX, Last TX/RX) : 87H/85H, 87H/85H
Error Correction Status : ODP:T ADP:R SABME:T UA:R XID:T,R SYNC
Energy at 3750Hz/Average Energy : 1156/925
Retrains (Issued/Granted/Fast) : 1/0/0
Renegs (Issued/Granted) : 5/0
Retrans per frame/Frames rejected : 1/19
Total number of REJ sent/received : 19/30
Last Retrain/Reneg reason : Fall-back due to high EQM
Last Retrain/Reneg requested : Local Rate Renegotiation
Minutes Since Last Retrain/Reneg : 0
Disconnect reason : LOCAL REQUEST
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 : Internal
CRe/CRd/CL/MS/ACK/NAK received : Yes/No/Yes/No/Yes/No
V.8bis success/V.8bis neg started : Yes/Yes


Unimodem Diagnostics/W32, version 1.1.0.1, compiled at Nov 20 2002 22:29:14
(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 : 10/28
Estimated noise level, -dBm : 62
TX/RX Negotiation : V.34/V.34
TX/RX Symbol Rate : 3429/3429
TX/RX Carrier frequency, Hz : 1959/1959
TX data rate (Last/Init) : 24000/24000
RX data rate (Last/Init) : 21600/26400
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 5
Retrains Requested/Granted : 1/0
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 135
Error control NAKs received : 30
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 13790/26477
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 2144/537
TX/RX I-Frame error count : 30/19
Termination Cause : cct108 turned Off


3-й пул:
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 : 00:05:21
Handshake Time/Retries : 18 sec/0
TX Rate (Last/Init/Min/Max) : 26400/26400/26400/26400
RX Rate (Last/Init/Min/Max) : 31200/28800/26400/31200
Modulation/Protocol/Compression : V.34/LAPM/V.42bis
TX Symbol rate : 3429
TX/RX carrier frequency, Hz : 1959/1959
Signal Level (TX/Power Drop), -dB : 9/3
RX Signal Level (Last/Min/Max), -dB : 28/28/28
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 5.207
EQM Value (Last/Min/Max/Negative) : 35/12/92/0
EQM Samples Running Sum : 0060
EQM Last 10 Readings : 43 43 36 38 39 37 32 33 43 37
SNR Ratio (Last/Min/Max), dB : 36/36/36
TX/RX Non-linear Encoding : ON/ON
TX/RX Precoding : ON/ON
TX/RX Constellation Shaping : ON/ON
TX Trellis Encoding : 16 state
TX Pre-emphasis : 3
TX/RX state (Max TX/RX, Last TX/RX) : 87H/85H, 87H/85H
Error Correction Status : ODP:T ADP:R SABME:T UA:R XID:T,R SYNC
Energy at 3750Hz/Average Energy : 940/748
Retrains (Issued/Granted/Fast) : 0/0/0
Renegs (Issued/Granted) : 7/0
Retrans per frame/Frames rejected : 1/105
Total number of REJ sent/received : 105/35
Last Retrain/Reneg reason : Fall-forward due to low EQM
Last Retrain/Reneg requested : Local Rate Renegotiation
Minutes Since Last Retrain/Reneg : 1
Disconnect reason : LOCAL REQUEST
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 : Internal
CRe/CRd/CL/MS/ACK/NAK received : Yes/No/Yes/No/Yes/No
V.8bis success/V.8bis neg started : Yes/Yes

Unimodem Diagnostics/W32, version 1.1.0.1, compiled at Nov 20 2002 22:29:14
(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 : 12/28
Estimated noise level, -dBm : 64
TX/RX Negotiation : V.34/V.34
TX/RX Symbol Rate : 3429/3429
TX/RX Carrier frequency, Hz : 1959/1959
TX data rate (Last/Init) : 26400/26400
RX data rate (Last/Init) : 31200/28800
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 7
Retrains Requested/Granted : 0/0
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 10
Error control NAKs received : 35
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 78043/813230
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 1672/6409
TX/RX I-Frame error count : 35/105
Termination Cause : cct108 turned Off

[Technical Support]

Скорость соединения вполне соответствует качеству связи. Проблемы при установлении соединения связаны, скорее всего, с Вашим ограничением скорости снизу (до 21600): если Ваш или удалённый модем не может работать на данной скорости при данном качестве линии - соединение не может быть установлено.

Пропишите такую строку инициализации:

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

и соберите статистику. И ещё: нужна полная статистика (включая at%s), а не только at%s1 и at#ud. Заставьте модем интенсивно работать на приём (скачайте какой-нибудь архив) - статистика "простоев" не столь информативна.
_________________
Inpro
Technical Support

[savl]

Благодарю за ответ.


вот новая статистика с строкой S91=12S210.7=1+MS=11;


at%s
Time Online.................. 00:28:31
Termination Reason........... NO REMOTE RESPONSE
Tx Rate (Last/Init/Min/Max).. 26400/24000/24000/26400 bps
Rx Rate (Last/Init/Min/Max).. 26400/26400/ 9600/28800 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............. 29/27/32
Highest Rx/Tx State.......... 83/87
EQM Sum...................... 005C
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 2/1/2
Renegs Issued/Granted........ 42/0
FForwards/FBacks/Denied...... 22/22/0
Forced FB/FB after FF/MaxREJ. 10/5/11
Last dialed number........... P3330019
Flex fail


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 : 00:28:31
Handshake Time/Retries : 18 sec/0
TX Rate (Last/Init/Min/Max) : 26400/24000/24000/26400
RX Rate (Last/Init/Min/Max) : 26400/26400/9600/28800
Modulation/Protocol/Compression : V.34/LAPM/V.42bis
TX Symbol rate : 3429
TX/RX carrier frequency, Hz : 1959/1959
Signal Level (TX/Power Drop), -dB : 12/0
RX Signal Level (Last/Min/Max), -dB : 24/29/24
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 5.207
EQM Value (Last/Min/Max/Negative) : 28/0/127/0
EQM Samples Running Sum : 005C
EQM Last 10 Readings : 30 29 24 31 23 26 29 31 24 23
SNR Ratio (Last/Min/Max), dB : 29/27/32
TX/RX Non-linear Encoding : ON/ON
TX/RX Precoding : ON/ON
TX/RX Constellation Shaping : ON/ON
TX Trellis Encoding : 16 state
TX Pre-emphasis : 1
TX/RX state (Max TX/RX, Last TX/RX) : 87H/83H, 83H/83H
Error Correction Status : ODP:T ADP:R SABME:T UA:R XID:T,R SYNC
Energy at 3750Hz/Average Energy : 925/747
Retrains (Issued/Granted/Fast) : 2/1/0
Renegs (Issued/Granted) : 42/0
Retrans per frame/Frames rejected : 1/121
Total number of REJ sent/received : NA
Last Retrain/Reneg reason : Fall-forward due to low EQM
Last Retrain/Reneg requested : Local Rate Renegotiation
Minutes Since Last Retrain/Reneg : 0
Disconnect reason : NO REMOTE RESPONSE
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 : Internal
CRe/CRd/CL/MS/ACK/NAK received : Yes/No/Yes/No/Yes/No
V.8bis success/V.8bis neg started : Yes/Yes


Unimodem Diagnostics/W32, version 1.1.0.1, compiled at Nov 20 2002 22:29:14
(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 : 12/24
Estimated noise level, -dBm : 53
TX/RX Negotiation : V.34/V.34
TX/RX Symbol Rate : 3429/3429
TX/RX Carrier frequency, Hz : 1959/1959
TX data rate (Last/Init) : 26400/24000
RX data rate (Last/Init) : 26400/26400
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 42
Retrains Requested/Granted : 2/1
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 86
Error control NAKs received : 134
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 273810/2478301
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 14598/18610
TX/RX I-Frame error count : 390/377
Termination Cause : cct108 turned Off

Реально, начиная с 27 минуты работы модем вообще "замер" - нулевая прием/передача.

[Technical Support]

Попробуйте сделать следующее:

1. Добавьте в начало строки инициализации команду:

S202.7=1

и проверьте, появится ли SREJ в строке:

Protocol/Compression......... LAP-M/V.42bis

если нет, то выполните следующий пункт.

2. Уберите S202.7=1 и замените её на:

S210.7=1

Пересоберите статистику.
_________________
Inpro
Technical Support

[savl]

SREJ не появился, поэтому привожу статистику со строчкой:
S210.7=1S91=12S+MS=11;

at%s
Time Online.................. 00:16:43
Termination Reason........... NO REMOTE RESPONSE
Tx Rate (Last/Init/Min/Max).. 21600/19200/19200/21600 bps
Rx Rate (Last/Init/Min/Max).. 24000/24000/ 9600/24000 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 19
Tx/Power Drop/Rx Level....... 12/0/22
SNR Last/Min/Max............. 31/29/31
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 010B
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 1/0/0
Renegs Issued/Granted........ 17/0
FForwards/FBacks/Denied...... 10/8/0
Forced FB/FB after FF/MaxREJ. 7/2/11
Last dialed number........... P3330019
Flex fail

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 : 00:16:43
Handshake Time/Retries : 19 sec/0
TX Rate (Last/Init/Min/Max) : 21600/19200/19200/21600
RX Rate (Last/Init/Min/Max) : 24000/24000/9600/24000
Modulation/Protocol/Compression : V.34/LAPM/V.42bis
TX Symbol rate : 3429
TX/RX carrier frequency, Hz : 1959/1959
Signal Level (TX/Power Drop), -dB : 12/0
RX Signal Level (Last/Min/Max), -dB : 21/28/21
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 5.207
EQM Value (Last/Min/Max/Negative) : 19/0/127/0
EQM Samples Running Sum : 010B
EQM Last 10 Readings : 20 20 18 18 17 19 20 22 21 18
SNR Ratio (Last/Min/Max), dB : 31/29/31
TX/RX Non-linear Encoding : ON/OFF
TX/RX Precoding : ON/ON
TX/RX Constellation Shaping : ON/ON
TX Trellis Encoding : 16 state
TX Pre-emphasis : 0
TX/RX state (Max TX/RX, Last TX/RX) : 87H/67H, 87H/67H
Error Correction Status : ODP:T ADP:R SABME:T UA:R XID:T,R SYNC
Energy at 3750Hz/Average Energy : 1046/818
Retrains (Issued/Granted/Fast) : 1/0/0
Renegs (Issued/Granted) : 17/0
Retrans per frame/Frames rejected : 1/81
Total number of REJ sent/received : NA
Last Retrain/Reneg reason : Fall-forward due to low EQM
Last Retrain/Reneg requested : Local Rate Renegotiation
Minutes Since Last Retrain/Reneg : 0
Disconnect reason : NO REMOTE RESPONSE
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 : Internal
CRe/CRd/CL/MS/ACK/NAK received : Yes/No/Yes/No/Yes/No
V.8bis success/V.8bis neg started : Yes/Yes


Unimodem Diagnostics/W32, version 1.1.0.1, compiled at Nov 20 2002 22:29:14
(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 : 12/22
Estimated noise level, -dBm : 53
TX/RX Negotiation : V.34/V.34
TX/RX Symbol Rate : 3429/3429
TX/RX Carrier frequency, Hz : 1959/1959
TX data rate (Last/Init) : 21600/19200
RX data rate (Last/Init) : 24000/24000
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 17
Retrains Requested/Granted : 1/0
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 155
Error control NAKs received : 44
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 87441/1000600
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 7548/9859
TX/RX I-Frame error count : 300/337
Termination Cause : cct108 turned Off

Коннект был на скорости 24000 , но данные почти не передавались - очень частые "замирания" связи.

[Technical Support]

Простите, опечатка вышла: вместо S210.4=1 попросили прописать S210.7=1

Но в общем-то, суть и так понятна: на линии периодически возникают сильные импульсные помехи, которые приводят к приёму ошибочных данных, причём происходит это практически на любой скорости (помехи слишком сильные).

Действуют помехи "в обеих направлениях" (и на приём, и на передачу). Обратите внимание: во всех статистиках примерно равное количество сбойных кадров данных на приём и на передачу:

TX/RX I-Frame error count : 300/337
TX/RX I-Frame error count : 390/377

В такой ситуации ничего иного не остаётся, как отказаться от снижения скорости по причине сбойных кадров (S210.4=1) (нет смысла снижать скорость, поскольку и на меньшей помехи "пробьют"). Возможно, в дополнение к этой установке Вам придётся подобрать (экспериментально) ограничение скорости, например: +MS=11,,,21600 таким образом, чтобы добиться наилучшей производительности.

И последнее: такие помехи очень часто вызывают телефонные аппараты с АОН, включённые параллельно модему. Не Ваш ли это случай?
_________________
Inpro
Technical Support

[savl]

Попробовал с новыми настройками:
S210.4=1S91=12S210.7=1+MS=11,,,28800;

at%s
Time Online.................. 00:18:31
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 24000/26400/24000/26400 bps
Rx Rate (Last/Init/Min/Max).. 28800/28800/19200/28800 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 127
Tx/Power Drop/Rx Level....... 12/0/19
SNR Last/Min/Max............. 34/34/34
Highest Rx/Tx State.......... 85/87
EQM Sum...................... 006A
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 11/1
FForwards/FBacks/Denied...... 7/4/0
Forced FB/FB after FF/MaxREJ. 0/0/0
Flex fail


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 : 00:18:31
Handshake Time/Retries : 19 sec/0
TX Rate (Last/Init/Min/Max) : 24000/26400/24000/26400
RX Rate (Last/Init/Min/Max) : 28800/28800/19200/28800
Modulation/Protocol/Compression : V.34/LAPM/V.42bis
TX Symbol rate : 3429
TX/RX carrier frequency, Hz : 1959/1959
Signal Level (TX/Power Drop), -dB : 12/0
RX Signal Level (Last/Min/Max), -dB : 19/32/19
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 5.499
EQM Value (Last/Min/Max/Negative) : 127/10/127/0
EQM Samples Running Sum : 006A
EQM Last 10 Readings : 127 125 125 123 123 49 46 46 46 53
SNR Ratio (Last/Min/Max), dB : 34/34/34
TX/RX Non-linear Encoding : ON/ON
TX/RX Precoding : ON/ON
TX/RX Constellation Shaping : ON/ON
TX Trellis Encoding : 16 state
TX Pre-emphasis : 1
TX/RX state (Max TX/RX, Last TX/RX) : 87H/85H, 87H/85H
Error Correction Status : ODP:T ADP:R SABME:T UA:R XID:T,R SYNC
Energy at 3750Hz/Average Energy : 979/790
Retrains (Issued/Granted/Fast) : 0/0/0
Renegs (Issued/Granted) : 11/1
Retrans per frame/Frames rejected : 1/192
Total number of REJ sent/received : 255 or more/196
Last Retrain/Reneg reason : Fall-forward due to low EQM
Last Retrain/Reneg requested : Local Rate Renegotiation
Minutes Since Last Retrain/Reneg : 8
Disconnect reason : LOCAL REQUEST
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 : Internal
CRe/CRd/CL/MS/ACK/NAK received : Yes/No/Yes/No/Yes/No
V.8bis success/V.8bis neg started : Yes/Yes


Unimodem Diagnostics/W32, version 1.1.0.1, compiled at Nov 20 2002 22:29:14
(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 : 12/19
Estimated noise level, -dBm : 53
TX/RX Negotiation : V.34/V.34
TX/RX Symbol Rate : 3429/3429
TX/RX Carrier frequency, Hz : 1959/1959
TX data rate (Last/Init) : 24000/26400
RX data rate (Last/Init) : 28800/28800
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 12
Retrains Requested/Granted : 0/0
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 55
Error control NAKs received : 196
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 100910/748096
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 5015/13506
TX/RX I-Frame error count : 196/448
Termination Cause : cct108 turned Off


Все так-же замирания связи и долгий дозвон: ошибки 777,678,619
Параллельного АОНя - нет.

[Technical Support]

Давайте сравним результаты. Было:

Time Online.................. 00:16:43
Rx Rate (Last/Init/Min/Max).. 24000/24000/ 9600/24000 bps
Retrains Issued/Granted/Auto. 1/0/0
Renegs Issued/Granted........ 17/0
FForwards/FBacks/Denied...... 10/8/0

Частота пересогласований - одно в 59 сек, и была одна перетренировка.

Стало:

Time Online.................. 00:18:31
Rx Rate (Last/Init/Min/Max).. 28800/28800/19200/28800 bps
Retrains Issued/Granted/Auto. 0/0/0
Renegs Issued/Granted........ 11/1
FForwards/FBacks/Denied...... 7/4/0

Частота пересогласований - одно в 101 сек, перетренировки отсутствуют.

Кроме того, прежде скорость приёма "проваливалась" до 9600. Сейчас такого резкого провала нет.

Теперь посмотрим на процент ошибок. Было:

TX/RX I-Frame count : 7548/9859
TX/RX I-Frame error count : 300/337

Процент - 337 / 9859 * 100% = 3.42%

Стало:

TX/RX I-Frame count : 5015/13506
TX/RX I-Frame error count : 196/448

Процент - 448 / 13506 * 100% = 3.32%

Как и предполагалось, процент ошибок слабо зависит от скорости (в последнем случае он даже ниже, но это можно списать на случайное везение).

В любом случае, процент ошибок очень высокий, и это приводит к резкому снижению производительности. Есть предположение, что помехи и связанные с ними ошибки "приходят пачками". Этим объясняются замирания связи и проблемы с её установлением (не выдерживаются временные интервалы, отведённые на идентификацию/авторизацию доступа).

Настройками модем что-либо улучшить в данной ситуации не удастся. Что можно было улучшить - уже сделали.

Приведём аналогию: солдат продвигается вперёд под огнём противника. Задача - бежать быстро, пока не стреляют. Вот точно так же и поступает Ваш модем: пережидает помехи (не снижая или почти не снижая скорости), и возобновляет движение (приём/передачу данных), как только помехи дают ему передышку.

Возможно, Вам стоит ужесточить ограничение скорости (28800 - слишком слабое). Проверьте опытным путём.
_________________
Inpro
Technical Support