Прокомментируйте статистику IDC 2814 BXL/VR+

[Maestro]

Интересно, почему во 2м и 4м примерах в графе Renegs Granted - 0, а в 1м и 3м их ОЧЕНЬ много? Модем используется в одно и то же время суток с одним и тем же модемным пулом.
Скорость на предачу ограничена на не более 24000 для более стабильной работы (для меня передача важна), если уменьшать уровень сигнала, то передача на 24000 становиться нестабильной.
Хотелось бы получить рекомендации по настройке.


Modem type: IDC-2814BXL/VR+ (Plus) Firmware revision: V2.23

----------------------------------
1)

Time Online.................. 01:16:35
Termination Reason........... RETRAIN FAILURE
Tx Rate (Last/Init/Min/Max).. 24000/24000/24000/24000 bps
Rx Rate (Last/Init/Min/Max).. 33600/33600/26400/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 127
Tx/Power Drop/Rx Level....... 13/0/NA
SNR Last/Min/Max............. 34/34/36
Highest Rx/Tx State.......... 67/87
EQM Sum...................... 001C
Retrains Issued/Granted/Auto. 2/0/0
Renegs Issued/Granted........ 11/199
FForwards/FBacks/Denied...... 5/7/0
Forced FB/FB after FF/MaxREJ. 1/1/7
Last dialed number........... P7559988


Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 127/16/127
EQM Hits..................... 0
EQM Last 10 Readings......... 56 54 55 57 58 59 57 56 57 55
Last Retrain/Reneg Status.... Local Retrain
Last Retrain/Reneg Reason.... Remote Rate Renegotiation
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 18 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....... 1
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 8,4
Last Rx/Tx State............. 22/20
Energy at 3750Hz/Average .... 140/1146
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. 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.............. 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.. 0/239
Frames Errors, Rx/Tx......... 239/11 (0,3%/0,0%)
Frames Count, Rx/Tx.......... 70955/29447
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 89
Error Control Link NAKs...... 11
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 9447555
Characters Sent.............. 861753
Average CPS, Rx/Tx........... 2056/187
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 86


----------------------------------
2)

Time Online.................. 02:42:46
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 24000/24000/24000/24000 bps
Rx Rate (Last/Init/Min/Max).. 33600/33600/ 9600/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 36
Tx/Power Drop/Rx Level....... 13/0/27
SNR Last/Min/Max............. 36/34/36
Highest Rx/Tx State.......... 85/87
EQM Sum...................... 0018
Retrains Issued/Granted/Auto. 4/0/1
Renegs Issued/Granted........ 56/0
FForwards/FBacks/Denied...... 34/25/0
Forced FB/FB after FF/MaxREJ. 2/1/8
Last dialed number........... P7559988


Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 36/0/127
EQM Hits..................... 0
EQM Last 10 Readings......... 33 33 36 34 36 37 34 38 37 34
Last Retrain/Reneg Status.... Local Rate Renegotiation
Last Retrain/Reneg Reason.... Local Fallforward due to Low EQM
Last Retrain/Reneg Time...... 4 minutes ago
Handshake Time/Retries....... 25 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....... 1
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 7,5
Last Rx/Tx State............. 85/87
Energy at 3750Hz/Average .... 3498/1891
V.8 Negotiation Started...... Yes
V.8bis Success............... Yes
V.8bis CRe,CRd,CL,MS,ACK,NAK. Yes/No/Yes/No/Yes/No
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. ADP:R ODP:T
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/250
Frames Errors, Rx/Tx......... 250/13 (0,2%/0,0%)
Frames Count, Rx/Tx.......... 120029/54373
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 44
Error Control Link NAKs...... 13
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 19126011
Characters Sent.............. 1293368
Average CPS, Rx/Tx........... 1958/132
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 63

----------------------------------
3)

Time Online.................. 03:02:58
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 24000/24000/24000/24000 bps
Rx Rate (Last/Init/Min/Max).. 31200/33600/ 9600/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 51
Tx/Power Drop/Rx Level....... 13/0/25
SNR Last/Min/Max............. 34/32/34
Highest Rx/Tx State.......... 85/87
EQM Sum...................... 001C
Retrains Issued/Granted/Auto. 3/1/0
Renegs Issued/Granted........ 39/199
FForwards/FBacks/Denied...... 19/23/0
Forced FB/FB after FF/MaxREJ. 3/0/10
Last dialed number........... P7559988


Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 51/0/127
EQM Hits..................... 0
EQM Last 10 Readings......... 45 51 46 47 46 47 46 48 47 49
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... ON/ON
Precoding, Rx/Tx............. ON/ON
Shaping, Rx/Tx............... ON/ON
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 1
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 8,4
Last Rx/Tx State............. 67/87
Energy at 3750Hz/Average .... 71/978
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. 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. ADP:R ODP:T
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/18
Frames Errors, Rx/Tx......... 274/14 (0,4%/0,0%)
Frames Count, Rx/Tx.......... 64646/31060
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 60
Error Control Link NAKs...... 14
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 9011884
Characters Sent.............. 1296322
Average CPS, Rx/Tx........... 820/118
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 59

----------------------------------
4)

Time Online.................. 01:35:50
Termination Reason........... LOCAL REQUEST
Tx Rate (Last/Init/Min/Max).. 24000/24000/24000/24000 bps
Rx Rate (Last/Init/Min/Max).. 28800/33600/ 9600/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 39
Tx/Power Drop/Rx Level....... 13/0/27
SNR Last/Min/Max............. 37/36/37
Highest Rx/Tx State.......... 85/87
EQM Sum...................... 0019
Retrains Issued/Granted/Auto. 1/1/1
Renegs Issued/Granted........ 35/0
FForwards/FBacks/Denied...... 19/17/0
Forced FB/FB after FF/MaxREJ. 1/0/7
Last dialed number........... P7559988


Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 39/0/127
EQM Hits..................... 0
EQM Last 10 Readings......... 38 38 40 39 45 40 38 41 41 38
Last Retrain/Reneg Status.... Local Rate Renegotiation
Last Retrain/Reneg Reason.... Local Fallback due to High EQM
Last Retrain/Reneg Time...... 2 minutes ago
Handshake Time/Retries....... 21 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....... 3
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 8,4
Last Rx/Tx State............. 85/87
Energy at 3750Hz/Average .... 3436/1856
V.8 Negotiation Started...... Yes
V.8bis Success............... Yes
V.8bis CRe,CRd,CL,MS,ACK,NAK. Yes/No/Yes/No/Yes/No
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. ADP:R ODP:T
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 1/54
Frames Errors, Rx/Tx......... 54/5 (0,1%/0,0%)
Frames Count, Rx/Tx.......... 42009/22231
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 16
Error Control Link NAKs...... 5
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 5959248
Characters Sent.............. 1076750
Average CPS, Rx/Tx........... 1036/187
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 64

[Technical Support]

Почему удалённый модем просит пересогласования скорости - вопрос к производителю удалённого модема. Мы можем только предполагать.

Предполагаем, что удалённый модем "не понимает", что Вы ограничили скорость передачи, и пытается её поднять (что, естественно, не удаётся). "Умный" модем делает 1-2 таких попытки и успокаивается на этом. "Тупой" продолжает ломиться в закрытую дверь.

Чтобы проверить это предположение, попробуйте существенно ограничить скорость передачи (скажем, до 9600), чтобы вызвать у удалённого модема постоянное желание поднять скорость. Если получите большое количество пересогласований - предположение верно. В этом случае единственно возможный вариант - отказаться от ограничения скорости передачи.
_________________
Inpro
Technical Support