как улучшить связь ?

[Sergey17]

Вот купил модем idc 5614bxl/vr+. Линия не цифровая. Связь на v90 не очень. Можно ли как-нибудь улучшить связь?
Строка инициализации S91=15 S210.7=1 S120=0 +MS=,,,44000
статистика:
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.23

Time Online.................. 00:03:17
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 31200/28800/28800/31200 bps
Rx Rate (Last/Init/Min/Max).. 34667/41333/34667/41333 bps
Modulation................... V.90
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 116
Tx/Power Drop/Rx Level....... 15/0/19
SNR Last/Min/Max............. 43/43/43
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 0110
RBS Pattern.................. 00
Rate Drop.................... 1
Digital Loss................. 2000
Retrains Issued/Granted/Auto. 5/0/1
Renegs Issued/Granted........ 2/3
FForwards/FBacks/Denied...... 2/5/0
Forced FB/FB after FF/MaxREJ. 0/2/2
Last dialed number...........
V90


Symbol Rate.................. 3200
Carrier Frequency Hz, Tx..... 1829
EQM Value (Last/Min/Max)..... 116/8/127
EQM Hits..................... 0
EQM Last 10 Readings......... 118 20 18 21 16 17 17 20 16 18
Last Retrain/Reneg Status.... Remote Rate Renegotiation
Last Retrain/Reneg Reason.... Remote Rate Renegotiation
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 19 seconds/0
Non-linear Encoding, Rx/Tx... OFF/ON
Precoding, Rx/Tx............. OFF/ON
Shaping, Rx/Tx............... OFF/ON
Trellis Encoding, Tx......... 64 state
Pre-Emphasis Index, Tx....... 6
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 3.8
Last Rx/Tx State............. 67/87
Energy at 3750Hz/Average .... 690/338
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........... No Limit (Reg.S120=0)
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 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:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/12
Frames Errors, Rx/Tx......... 12/0 (0.6%/0.0%)
Frames Count, Rx/Tx.......... 1903/1213
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 20
Error Control Link NAKs...... 0
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 200774
Characters Sent.............. 35413
Average CPS, Rx/Tx........... 1019/179
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 62

[Technical Support]

Лучший выход в такой ситуации - перейти на V.34. Замените строчку инициализации на такую:

S91=15 S210.7=1 +MS=11
_________________
Inpro
Technical Support

[Sergey17]

[Technical Support]

6 перетренировок за 3 минуты. В среднем, перетренировка каждые 35 сек... Разве это работа?

Конечно, есть немалая вероятность, что модем устаканит скорость приёма в районе 33333...36000 Кбит и перетренировки станут реже, но при этом реальная производительность всё равно будет близкой (скорее всего, будет уступать) той, которую можно получить на 33600/V.34.
_________________
Inpro
Technical Support

[Михаил.Н.]

А может быть просто V90 кривоват

[Peter Stoliarov]

[Valery Teryokhin]

присоветуйте, пожалуйста, и мне что подкрутить. Настройки модема сбросил по at*nc22 ..... Вот статистика:

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 : 00:03:26
Handshake Time/Retries : 21 sec/0
TX Rate (Last/Init/Min/Max) : 21600/21600/14400/21600
RX Rate (Last/Init/Min/Max) : 31200/31200/24000/31200
Modulation/Protocol/Compression : V.34/LAPM/V.42bis
TX Symbol rate : 3200
TX/RX carrier frequency, Hz : 1829/1829
Signal Level (TX/Power Drop), -dB : 15/0
RX Signal Level (Last/Min/Max), -dB : 29/36/29
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 5.063
EQM Value (Last/Min/Max/Negative) : 50/11/127/0
EQM Samples Running Sum : 0033
EQM Last 10 Readings : 46 48 52 53 51 46 53 48 53 46
SNR Ratio (Last/Min/Max), dB : 51/39/51
TX/RX Non-linear Encoding : OFF/ON
TX/RX Precoding : OFF/ON
TX/RX Constellation Shaping : OFF/ON
TX Trellis Encoding : 16 state
TX Pre-emphasis : 1
TX/RX state (Max TX/RX, Last TX/RX) : 67H/65H, 67H/65H
Error Correction Status : SABME:T UA:R XID:T,R SYNC
Dual PCM/120 Hz detection : Yes/No
Energy at 3750Hz/Average Energy : 24/502
Retrains (Issued/Granted/Fast) : 0/8/0
Renegs (Issued/Granted) : 0/2
Retrans per frame/Frames rejected : 1/24
Total number of REJ sent/received : 24/6
Last Retrain/Reneg reason : Remote initiated a retrain
Last Retrain/Reneg requested : Remote Retrain
Minutes Since Last Retrain/Reneg : 1
Fallback to V34 reason : Data Pump early decision to FB to V34
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): 1.1
Remote K56Flex RAM version supported: 70
Remote Coding used/forced by server : A-law/Yes
Remote controller version number : 0
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 1.1.0.0, compiled at Mar 14 2002 18:01:05
(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 : 15/30
Estimated noise level, -dBm : 73
TX/RX Negotiation : V.34/V.34
TX/RX Symbol Rate : 3200/3200
TX/RX Carrier frequency, Hz : 1829/1829
TX data rate (Last/Init) : 21600/21600
RX data rate (Last/Init) : 31200/31200
Temporary carrier loss count : 0
Carrier Rate Re-neg count : 2
Retrains Requested/Granted : 0/8
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 6
Error control NAKs received : 6
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 11527/286461
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 612/2289
TX/RX I-Frame error count : 6/24
Termination Cause : cct108 turned Off

[Technical Support]

[Valery Teryokhin]

ati3
IDC-5614BXL/VR firmware by Mike Telis, V2.22-V90_2M_DLS
Copyright (c) Inpro, 1998-2002

ati6
RCV56DPF-PLL L8571A Rev 43.06/43.06

На модеме написано IDC-5614BXL/VR. Я так понимаю это не "plus"?

статистика до добавления предложенной Вами строки:

Статистику удалили, она уже была в этой теме.

статистика после добавления предложенной Вами строки:

at%s
Time Online.................. 00:10:02
Termination Reason........... NO REMOTE RESPONSE
Tx Rate (Last/Init/Min/Max).. 14400/14400/12000/14400 bps
Rx Rate (Last/Init/Min/Max).. 28800/28800/21600/31200 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 126
Tx/Power Drop/Rx Level....... 15/0/45
SNR Last/Min/Max............. 43/37/43
Highest Rx/Tx State.......... 67/67
EQM Sum...................... 003B
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/21/1
Renegs Issued/Granted........ 6/0
FForwards/FBacks/Denied...... 1/5/0
Forced FB/FB after FF/MaxREJ. 1/0/7
Last dialed number........... P956-22-88
Flex fail

OK


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 : 00:10:02
Handshake Time/Retries : 20 sec/0
TX Rate (Last/Init/Min/Max) : 14400/14400/12000/14400
RX Rate (Last/Init/Min/Max) : 28800/28800/21600/31200
Modulation/Protocol/Compression : V.34/LAPM/V.42bis
TX Symbol rate : 3200
TX/RX carrier frequency, Hz : 1829/1829
Signal Level (TX/Power Drop), -dB : 15/0
RX Signal Level (Last/Min/Max), -dB : 45/47/10
Band Edge Lower/Upper, Hz : 150/3825
Round trip delay, ms : 7.250
EQM Value (Last/Min/Max/Negative) : 126/0/127/0
EQM Samples Running Sum : 003B
EQM Last 10 Readings : 126 126 127 127 27 28 25 51 51 44
SNR Ratio (Last/Min/Max), dB : 51/37/51
TX/RX Non-linear Encoding : OFF/ON
TX/RX Precoding : OFF/ON
TX/RX Constellation Shaping : OFF/ON
TX Trellis Encoding : 16 state
TX Pre-emphasis : 6
TX/RX state (Max TX/RX, Last TX/RX) : 67H/67H, 67H/67H
Error Correction Status : ODP:T ADP:R SABME:T UA:R XID:T,R SYNC
Energy at 3750Hz/Average Energy : 42/504
Retrains (Issued/Granted/Fast) : 0/21/0
Renegs (Issued/Granted) : 6/0
Retrans per frame/Frames rejected : 1/93
Total number of REJ sent/received : 93/10
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 : 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 1.1.0.0, compiled at Mar 14 2002 18:01:05
(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 : 15/45
Estimated noise level, -dBm : 88
TX/RX Negotiation : V.34/V.34
TX/RX Symbol Rate : 3200/3200
TX/RX Carrier frequency, Hz : 1829/1829
TX data rate (Last/Init) : 14400/14400
RX data rate (Last/Init) : 28800/28800
Temporary carrier loss count : 140
Carrier Rate Re-neg count : 6
Retrains Requested/Granted : 0/21
Protocol/Compression : V.42 LAPM/V.42bis
Error control frame size, bytes: 128
Error control timeouts in TX : 17
Error control NAKs received : 10
Compression dict. size, bytes : 2048
TX/RX flow control : V.24 ckt 106/133 / V.24 ckt 106/133
TX/RX chars sent : 22779/681742
TX/RX chars lost (data overrun): 0/0
TX/RX I-Frame count : 1226/5918
TX/RX I-Frame error count : 10/93
Termination Cause : cct108 turned Off

[Technical Support]

[Valery Teryokhin]

Пришлось зажать до 9600, ретрейны с той стороны уменьшились до приемлимого уровня.
Подскажите что дает S210.7=1 ?

[Technical Support]

S210.7=1 запрещает снижать выходную мощность передатчика Вашего модема по запросу удалённого. К сожалению, многие модемы просят неадекватно большое снижение мощности и затем им не удаётся толком работать. Поэтому приходится этот механизм отключать и вручную выставлять уровень мощности передатчика (регистром S91).
_________________
Inpro
Technical Support

[Valery Teryokhin]

Понял. Благодарю за консультацию.