Здравствуйте. Жаловался абонент на маленькую скорость подключения. Снял показания с DSLAM'а
Код:
show adslphysical
ATU-C:
1.InvSerialNumber: 11-d0-93-14
2.InvVendorID: GSI
3.InvVersionNumber: 53060
4.Current SNR margin: 8.0 dB
5.Current attenuation: 1.0 dB
6.Current status: NO DEFECT
7.Current output power: 4 dBm
8.Current attainable rate: 4029 Kbps
ATU-R:
1.InvSerialNumber: -
2.InvVendorID: -
3.InvVersionNumber: -
4.Current SNR margin: 8.0 dB
5.Current attenuation: 11.5 dB
6.Current status: NO DEFECT
7.Current output power: 12 dBm
8.Current attainable rate: 965 Kbps
IPDSLAM# show sysinfo
System name: DAS-3216
Location:
Contact:
Console name: IPDSLAM
1.Hardware version: A1
2.Software version: 1.02
3.Serial number: 00-0f-3d-11-d0-93
4.Description: D-Link DAS-3216 ADSL IP DSLAM
5.Temperature: Normal
и с модема (Acorp Sprinter@ADSL LAN420)
Код:
Modem Status
Connection Status Connected
Us Rate (Kbps) 1084
Ds Rate (Kbps) 23882
US Margin 9
DS Margin 6
Trained Modulation ADSL_2plus
LOS Errors 0
DS Line Attenuation 17
US Line Attenuation 8
Peak Cell Rate 2556 cells per sec
CRC Rx Fast 0
CRC Tx Fast 0
CRC Rx Interleaved 9
CRC Tx Interleaved 0
Path Mode Interleaved
DSL Statistics
Near End F4 Loop Back Count 0
Near End F5 Loop Back Count 0
Вопрос: почему так сильно различаються значения скоростей для Downstream, SNR и Line Attinuation.