помогите разобраться с таинственным GSTN CLEARDOWN

[Valter]

Модем раз за разом периодически отключается
АТС - аналоговая. Какой лучше сделать строку инициализации?
Сейчас она пуста

Inpro IDC Modems Diagnostics, Version 1.0.2.33
18.02.2004 22:02:33 - Outbound Call by RemoteAccess
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.24

Time Online.................. 00:21:38
Termination Reason........... GSTN CLEARDOWN
Tx Rate (Last/Init/Min/Max).. 21600/14400/14400/26400 bps
Rx Rate (Last/Init/Min/Max).. 33600/31200/31200/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 25
Tx/Power Drop/Rx Level....... 15/2/33
SNR Last/Min/Max............. 31/29/34
Highest Rx/Tx State.......... 65/87
EQM Sum...................... 0032
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/2/0
Renegs Issued/Granted........ 2/5
FForwards/FBacks/Denied...... 2/0/0
Forced FB/FB after FF/MaxREJ. 0/0/4
Last dialed number........... P2342333
Flex fail 9481834246E0


Negotiation Result (Rx/Tx)... V.34/V.34
Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 25/23/114
EQM Hits..................... 0
EQM Last 10 Readings......... 29 30 26 31 12 25 31 27 26 28
Last Retrain/Reneg Status.... Remote Retrain
Last Retrain/Reneg Reason.... Remote Retrain
Reason for V.34 Fallback..... Data Pump decision to Fallback
Last Retrain/Reneg Time...... 1 minutes ago
Handshake Time/Retries....... 42 seconds/2
Non-linear Encoding, Rx/Tx... ON/OFF
Precoding, Rx/Tx............. ON/OFF
Shaping, Rx/Tx............... ON/OFF
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 1
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 3,2
Last Rx/Tx State............. 65/67
Energy at 3750Hz/Average .... 27770/4095
Auto Gain Amplitude, db...... 10
AGC Gain (Last/Min/Max)...... 54/54/105
Detection of 120 Hz Tones.... Yes
Detection of Dual PCM........ No
V.8 Negotiation Started...... Yes
V.8bis Success............... Yes
V.8bis CRe,CRd,CL,MS,ACK,NAK. Yes/No/Yes/No/Yes/No
Remote Manufacturer.......... Rockwell (Conexant)
Remote Licensee Code......... Rockwell (Conexant)
Remote Protocol Support...... K56flex V.90
Remote K56flex Version....... 02
Remote K56flex Capabilities.. Prototype mode is not supported
Remote Type.................. Server (Digital)
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...... External
Workaround Used.............. ABCODE check (Machine Gun Noise)
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 0/72
Frames Errors, Rx/Tx......... 72/9 (0,2%/0,1%)
Frames Count, Rx/Tx.......... 34785/6296
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 6
Error Control Link NAKs...... 9
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 4 431 276
Characters Sent.............. 156 082
Average CPS, Rx/Tx........... 3413/120
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 64


Inpro IDC Modems Diagnostics, Version 1.0.2.33
18.02.2004 22:10:31 - Outbound Call by RemoteAccess
--------------------------------------------------------
Modem type: IDC-5614BXL/VR+ (Plus) Firmware revision: V2.24

Time Online.................. 00:06:40
Termination Reason........... GSTN CLEARDOWN
Tx Rate (Last/Init/Min/Max).. 26400/16800/16800/26400 bps
Rx Rate (Last/Init/Min/Max).. 33600/33600/33600/33600 bps
Modulation................... V.34bis
Protocol/Compression......... LAP-M/V.42bis
Line Quality................. 127
Tx/Power Drop/Rx Level....... 15/2/13
SNR Last/Min/Max............. 31/29/36
Highest Rx/Tx State.......... 65/87
EQM Sum...................... 006E
RBS Pattern.................. NA
Rate Drop.................... NA
Digital Loss................. None
Retrains Issued/Granted/Auto. 0/1/0
Renegs Issued/Granted........ 0/3
FForwards/FBacks/Denied...... 0/0/0
Forced FB/FB after FF/MaxREJ. 0/0/4
Last dialed number........... P2342333
Flex fail 9481834246E0


Negotiation Result (Rx/Tx)... V.34/V.34
Symbol Rate.................. 3429
Carrier Frequency Hz, Rx/Tx.. 1959/1959
EQM Value (Last/Min/Max)..... 127/26/127
EQM Hits..................... 0
EQM Last 10 Readings......... 127 31 28 30 35 35 32 27 30 31
Last Retrain/Reneg Status.... Remote Retrain
Last Retrain/Reneg Reason.... Remote Retrain
Reason for V.34 Fallback..... Data Pump decision to Fallback
Last Retrain/Reneg Time...... 0 minutes ago
Handshake Time/Retries....... 43 seconds/2
Non-linear Encoding, Rx/Tx... ON/OFF
Precoding, Rx/Tx............. ON/OFF
Shaping, Rx/Tx............... ON/OFF
Trellis Encoding, Tx......... 16 state
Pre-Emphasis Index, Tx....... 1
Band Edges Lower/Upper, Hz... 150/3825
Round trip delay, ms......... 3,7
Last Rx/Tx State............. 65/67
Energy at 3750Hz/Average .... 28435/4095
Auto Gain Amplitude, db...... 10
AGC Gain (Last/Min/Max)...... 106/63/106
Detection of 120 Hz Tones.... Yes
Detection of Dual PCM........ No
V.8 Negotiation Started...... Yes
V.8bis Success............... Yes
V.8bis CRe,CRd,CL,MS,ACK,NAK. Yes/No/Yes/No/Yes/No
Remote Manufacturer.......... Rockwell (Conexant)
Remote Licensee Code......... Rockwell (Conexant)
Remote Protocol Support...... K56flex V.90
Remote K56flex Version....... 02
Remote K56flex Capabilities.. Prototype mode is not supported
Remote Type.................. Server (Digital)
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...... External
Error Correction Status Byte. SYNC UA:R SAMBE:T XID:T XID:R
Frames REJected, Last/Total.. 0/34
Frames Errors, Rx/Tx......... 34/5 (0,3%/0,3%)
Frames Count, Rx/Tx.......... 10839/1942
Error Control Frame Size..... V.42 LAPM (128)
Error Control Timeouts....... 5
Error Control Link NAKs...... 5
Compression Dictionary Size.. V.42bis (2048)
Characters Received.......... 1 337 388
Characters Sent.............. 45 744
Average CPS, Rx/Tx........... 3343/114
Characters Lost, Rx/Tx....... 0/0
Estimated Noise Level, -dBm.. 44

[Игорь Тимашков]

Строка не поможет - ты ничего не сделаешь

GSTN Cleardown посылается удаленным модемом, когда он хочет срочно свалить с линии, не дожидаясь подтверждения от нашего модема.

Наиболее вероятная причина такого - в условиях продолжительных помех курьер не смог за 12 попыток принять ни одного кадра данных протокола LAPM.
После чего он разрывает связь с диагностикой - RETRANSMIT LIMIT.
Нашему модему при этом посылается GSTN Cleardown.

Имхо нет у курьера такой прошивки, которая бы фиксила этот глюк...

[Technical Support]