Help please: 5614 bxl/vr+ на плохой(?) линии

[Michael Skolsky]

Джентельмены, помогите, плз, поднастроить модем на плохой линии. Hиже
приведена типичная статистика сеанса связи. Игры с s91 (8..13), запретом v.8bis
и v.34 ни к чему не приводят. Или тут проблема с АТС? Как тогда телефонистам
грамотно вопрос задавать?

И еще вопрос -- как можно изменить системную строку инициализации
модема (WinXP)?

=== Cut ===
Inpro IDC Modems Diagnostics, Version: 1.1.4.39
06.02.2005 0:21:14 - Outbound Call By Radius
--------------------------------------------------------
Modem Type: IDC-5614BXL/VR+ (Plus) Firmware Revision: V2.26
System Modem Init String: AT&FS38=0S95=41S115=0E0<cr>
User Modem Init String: <none>

Time Online.................. 00:02:15
Termination Reason........... RETRAIN FAILURE
Tx Rate (Last/Init/Min/Max).. 7200/ 7200/ 7200/ 9600 bps
Rx Rate (Last/Init/Min/Max).. 4800/14400/ 4800/14400 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 127
Tx/Power Drop/Rx Level....... 9/0/NA
SNR Last/Min/Max............. 34/34/34
Highest Rx/Tx State.......... 67/67
EQM Sum...................... 0000
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 2/1/0
Renegs Issued/Granted........ 4/2
FForwards/FBacks/FEQM/Denied. 0/5/0/0
Forced FB/FB after FF/MaxREJ. 2/0/8
Last dialed number........... T*******
Flex fail


Negotiation Result (Rx/Tx)... V.34/V.34
Symbol Rate.................. 3000
Carrier Frequency Hz, Rx/Tx.. 1800/1800
EQM Value (Last/Min/Max)..... 127/29/127
EQM Hits..................... 0
EQM Last 10 Readings......... 127 127 127 127 127 127 127 41 42 40
Last Retrain/Reneg Status.... Local Retrain
Last Retrain/Reneg Reason.... Lost Connection
Last Retrain/Reneg Time...... 1 minutes ago
Handshake Time/Retries....... 43 seconds/2
Non-linear Encoding, Rx/Tx... OFF/ON
Precoding, Rx/Tx............. ON/OFF
Shaping, Rx/Tx............... ON/ON
Trellis Encoding, Tx......... 64 state
Pre-Emphasis Index, Tx....... 6
Band Edges Lower/Upper, Hz... 262/3525
Round trip delay, ms......... 8,5
Last Rx/Tx State............. 22/20
Energy at 3750Hz/Average .... 0/3
Rx Level (Last/Min/Max), -dB. NA/47,6/46,1d
Detection of 120 Hz Tones.... No
Detection of Dual PCM........ Yes
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 3000(L) 3000(H)
Remote supports Symbol Rates. 3200(L) 3200(H)
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.............. ABCODE check (Machine Gun Noise)
Error Correction Status Byte. ADP:R ODP:T
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 4/38
Frames Errors, Rx/Tx......... 38/0 (3,4%/0,0%)
Frames Count, Rx/Tx.......... 1112/36
Error Control Frame Size..... V.42 LAPM (64)
Error Control Timeouts....... 4
Error Control Link NAKs...... 0
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 25 223
Characters Sent.............. 670
Average CPS, Rx/Tx........... 186/4
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 86
=== Cut ===


=== Cut ===
Inpro IDC Modems Diagnostics, Version: 1.1.4.39
06.02.2005 0:30:49 - Outbound Call By Radius
--------------------------------------------------------
Modem Type: IDC-5614BXL/VR+ (Plus) Firmware Revision: V2.26
System Modem Init String: AT&FS38=0S95=41S115=0E0<cr>
User Modem Init String: <none>

Time Online.................. 00:02:11
Termination Reason........... NO REMOTE RESPONSE
Tx Rate (Last/Init/Min/Max).. 7200/ 7200/ 4800/ 7200 bps
Rx Rate (Last/Init/Min/Max).. 9600/14400/ 9600/14400 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 81
Tx/Power Drop/Rx Level....... 9/0/15
SNR Last/Min/Max............. 36/36/36
Highest Rx/Tx State.......... 00/00
EQM Sum...................... 0B86
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/1/1
Renegs Issued/Granted........ 2/2
FForwards/FBacks/FEQM/Denied. 0/2/0/0
Forced FB/FB after FF/MaxREJ. 1/0/8
Last dialed number........... T*******
Flex fail


Negotiation Result (Rx/Tx)... V.34/V.34
Symbol Rate.................. 3200
Carrier Frequency Hz, Rx/Tx.. 1829/1829
EQM Value (Last/Min/Max)..... 81/28/102
EQM Hits..................... 0
EQM Last 10 Readings......... 50 38 38 41 44 43 37 41 36 39
Last Retrain/Reneg Status.... Remote Retrain
Last Retrain/Reneg Reason.... Remote Retrain
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 26 seconds/0
Non-linear Encoding, Rx/Tx... OFF/ON
Precoding, Rx/Tx............. ON/ON
Shaping, Rx/Tx............... ON/ON
Trellis Encoding, Tx......... 64 state
Pre-Emphasis Index, Tx....... 6
Band Edges Lower/Upper, Hz... 150/3675
Round trip delay, ms......... 8,2
Last Rx/Tx State............. 67/87
Energy at 3750Hz/Average .... 0/6
Rx Level (Last/Min/Max), -dB. 15,0/45,3/15,0
Detection of 120 Hz Tones.... No
Detection of Dual PCM........ Yes
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 3000(L) 3000(H)
Remote supports Symbol Rates. 3200(L) 3200(H)
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:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 0/63
Frames Errors, Rx/Tx......... 63/0 (2,2%/0,0%)
Frames Count, Rx/Tx.......... 2833/33
Error Control Frame Size..... V.42 LAPM (64)
Error Control Timeouts....... 9
Error Control Link NAKs...... 0
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 87 179
Characters Sent.............. 656
Average CPS, Rx/Tx........... 665/5
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 51
=== Cut ===
_________________
73!
Michael.

[Technical Support]

Судя по статистикам, проблема - в очень большом затухании сигнала, из-за чего уровень принимаемого сигнала крайне низкий. И удалённому модему приходится ещё хуже, чем Вашему (там, похоже, какой-то из US Robotics, а эти модемы менее толерантны к низкому уровню сигнала, чем IDC).

В принципе, эти явления могут быть связаны с аппаратной неисправностью модема. Однако, если сигнал слабый даже "на слух", то эту проблему можно отмести. В противном случае неплохо начать с проверки модема на заведомо хорошей линии.

Если работоспособность модема вопросов не вызывает, то надо обращаться на АТС и жаловаться на затухание сигнала ("плохо слышно, очень тихий сигнал").
_________________
Inpro
Technical Support

[Michael Skolsky]

Беда в том, с точки зрения голосовой связи эта линия значительно лучше, чем соседняя. Да и неудивительно -- расстояние по меди до оборудования каналообразования -- порядка 40м (с 10-го этажа до 1-го). Дальше до АТС тракт полностью цифровой (оптика). АТС включается в городскую сеть тоже по цифровым каналам (http://www.line1.ru/builders/?id=45). Рядом стоит ПТС-овский телефон (сеть общего пользования) там по меди порядка пары километров до АТС будет...

Поскольку модем негарантийный (больше 2х лет уж работает) -- есть ли смысл тащить в сервис, или будут рекомендации -- что можно проверить самому? Необходимые приборы/навыки имеются, нет схемотехнической информации...

Статистика попытки дозвона на тот же номер с другой телефонной линии. В 9 случаях из 10 ответ -- No Carrier...
<cut>
07.02.2005 2:34:33 - Outbound Call By Radius
--------------------------------------------------------
Modem Type: IDC-5614BXL/VR+ (Plus) Firmware Revision: V2.26
System Modem Init String: AT&FS38=0S95=41S115=0E0<cr>
User Modem Init String: <none>

Time Online.................. 00:00:48
Termination Reason........... RETRAIN FAILURE
Tx Rate (Last/Init/Min/Max).. 4800/ 4800/ 4800/ 4800 bps
Rx Rate (Last/Init/Min/Max).. 21600/21600/21600/21600 bps
Modulation................... V.34bis
Protocol/Compression......... NONE
Line Quality................. 0
Tx/Power Drop/Rx Level....... 9/0/NA
SNR Last/Min/Max............. 34/34/34
Highest Rx/Tx State.......... 63/64
EQM Sum...................... 1BF6
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/2/0
Renegs Issued/Granted........ 0/0
FForwards/FBacks/FEQM/Denied. 0/0/0/0
Forced FB/FB after FF/MaxREJ. 0/0/0
Last dialed number........... P*******
Flex fail


Negotiation Result (Rx/Tx)... V.34/V.34
Symbol Rate.................. 3000
Carrier Frequency Hz, Rx/Tx.. 1800/1800
EQM Value (Last/Min/Max)..... 0/255/0
EQM Hits..................... 0
Last Retrain/Reneg Status.... Remote Retrain
Last Retrain/Reneg Reason.... Remote Retrain
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 25 seconds/0
Non-linear Encoding, Rx/Tx... ON/ON
Precoding, Rx/Tx............. ON/OFF
Shaping, Rx/Tx............... ON/ON
Trellis Encoding, Tx......... 64 state
Pre-Emphasis Index, Tx....... 6
Band Edges Lower/Upper, Hz... 150/3525
Round trip delay, ms......... 2,2
Last Rx/Tx State............. 22/20
Energy at 3750Hz/Average .... 0/5
Rx Level (Last/Min/Max), -dB. NA/45,3/45,3d
Detection of 120 Hz Tones.... No
Detection of Dual PCM........ Yes
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 3000(L) 3000(H)
Remote supports Symbol Rates. 3200(L) 3200(H)
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.............. ABCODE check (Machine Gun Noise)
Error Correction Status Byte. ODP:T
Frames REJected, Last/Total.. 0/0
Frames Count, Rx/Tx.......... 0/0
Error Control Frame Size..... NONE (0)
Error Control Timeouts....... 0
Error Control Link NAKs...... 0
Compression Dictionary Size.. NONE (0)
Characters Received.......... 511
Characters Sent.............. 367
Average CPS, Rx/Tx........... 10/7
Characters Lost, Rx/Tx....... 2/0
Estimated Noise Level, -dBm.. 86
<cut>

<cut>
Inpro IDC Modems Diagnostics, Version: 1.1.4.39
07.02.2005 2:46:35 - Outbound Call By Radius
--------------------------------------------------------
Modem Type: IDC-5614BXL/VR+ (Plus) Firmware Revision: V2.26
System Modem Init String: AT&FS38=0S95=41S115=0E0<cr>
User Modem Init String: <none>

Time Online.................. 00:01:29
Termination Reason........... RETRAIN FAILURE
Tx Rate (Last/Init/Min/Max).. 4800/ 4800/ 4800/ 4800 bps
Rx Rate (Last/Init/Min/Max).. 21600/21600/21600/21600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 58
Tx/Power Drop/Rx Level....... 9/0/NA
SNR Last/Min/Max............. 34/34/34
Highest Rx/Tx State.......... 67/84
EQM Sum...................... 01B9
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/0/1
Renegs Issued/Granted........ 1/0
FForwards/FBacks/FEQM/Denied. 0/1/0/0
Forced FB/FB after FF/MaxREJ. 1/0/7
Last dialed number........... P*******
Flex fail


Negotiation Result (Rx/Tx)... V.34/V.34
Symbol Rate.................. 3200
Carrier Frequency Hz, Rx/Tx.. 1829/1829
EQM Value (Last/Min/Max)..... 58/42/62
EQM Hits..................... 0
EQM Last 10 Readings......... 56 62 59 58 61 48 47 51 53 48
Last Retrain/Reneg Status.... Local Rate Renegotiation
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Last Retrain/Reneg Time...... 1 minutes ago
Handshake Time/Retries....... 26 seconds/0
Non-linear Encoding, Rx/Tx... ON/ON
Precoding, Rx/Tx............. ON/ON
Shaping, Rx/Tx............... ON/ON
Trellis Encoding, Tx......... 64 state
Pre-Emphasis Index, Tx....... 6
Band Edges Lower/Upper, Hz... 150/3675
Round trip delay, ms......... 2,6
Last Rx/Tx State............. 20/21
Energy at 3750Hz/Average .... 0/5
Rx Level (Last/Min/Max), -dB. NA/45,3/45,3d
Detection of 120 Hz Tones.... No
Detection of Dual PCM........ Yes
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 3000(L) 3000(H)
Remote supports Symbol Rates. 3200(L) 3200(H)
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.............. V90 Phase 2 Escape
Workaround Used.............. Rate Reneg Failure (At 64 or 84)
Workaround Used.............. V34 Codex WA/V34 Stuck Phase2
Workaround Used.............. ABCODE check (Machine Gun Noise)
Error Correction Status Byte. ADP:R ODP:T
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 0/18
Frames Errors, Rx/Tx......... 18/0 (1,0%/0,0%)
Frames Count, Rx/Tx.......... 1786/28
Error Control Frame Size..... V.42 LAPM (64)
Error Control Timeouts....... 0
Error Control Link NAKs...... 0
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 64 523
Characters Sent.............. 615
Average CPS, Rx/Tx........... 724/6
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 86
<cut>
_________________
73!
Michael.

[Technical Support]