Thread: is local snr margin below 6 is bad?

my line status in my modem page shows local snr margin 5.5 dB but in my friends house its over 20 dB. is there any fault in my phone line. i getting 1.7 mbps speed but my ping is over 100ms.

Broadband Line Status

Refresh



Line Rate 125258
Tx Cell Transmitted 0
Rx Cell Received 0
Cbr_CPS 0
Rvbr SCR_CPS 0
Vbr SCR_CPS 0
Rvbr PCR_CPS 0
Vbr PCR_CPS 0
Ubr_CPS 3372
Ubr MCR_CPS 0
CACMode Simple
CACFunction 0x2002a4cc
Port Speed Hook 0x00000000
Vpi Range 8
Vci Range 16
Default Pcr 0
Traffic Shaping false
Ni Type uni
Is Dsl Dma Up 1
Enabled Channels 4
Driver Version 1.75
APIVersion GS_API_626
Firmware Version E.37.7.37
Dsp Version 0x00000090
Common Handshake Disable
Connected true
Operational Mode G.Dmt.Bis
State Showtime
Watchdog 0x00000053
Operation Progress 0x00000000
Last Failed 0x00000000
Tx Bit Rate 238400
Rx Bit Rate 6971600
Rx ATTNDR 6680000
Code Type Status AnnexA
Tx Cell Rate 562
Rx Cell Rate 16442
Phy TXCell Count 155284
Phy RXCell Count 1409008
Phy Cell Drop Count 1
Overall Failure 0
Data Boost Disable
Local ITUCountry Code 0x0000b5ff
Local SEF 0
Local End LOS 0
Local SNRMargin 5.5 dB
Local Line Attn 16.0 dB
INPup 1.93
INPdown 2.19
PMstatus L0
Raw Attn 0.0 dB
Local Tx Power 12.4 dB
Local Fast Channel Rx Rate 0
Local Fast Channel Tx Rate 0
Local Fast Channel FEC 0
Local Fast Channel CRC 0
Local Fast Channel HEC 0
Local Fast Channel NCD 0
Local Fast Channel OCD 0
Local Interleaved Channel Rx Rate 6971600
Local Interleaved Channel Tx Rate 238400
Local Interleaved Channel FEC 0
Local Interleaved Channel CRC 0
Local Interleaved Channel HEC 0
Local Interleaved Channel NCD 0
Local Interleaved Channel OCD 0
Remote Tx Power 20.5 dB
Remote SEF 0
Remote LOS 0
Remote Line Attn 7.0 dB
Remote SNRMargin 6.5 dB
Remote Fast Channel FEC 0
Remote Fast Channel CRC 0
Remote Fast Channel HEC 0
Remote Fast Channel NCD 0
Remote Interleaved Channel FEC 0
Remote Interleaved Channel CRC 0
Remote Interleaved Channel HEC 0
Remote Interleaved Channel NCD 0
Local Mgmt FEC0 1900
Local Mgmt CRC0 290
Local Mgmt FECErrored Sec 328
Local Mgmt Errored Sec 53
Local Mgmt Severely Errored Sec 10
Local Mgmt LOSErrored Sec 0
Local Mgmt Unavail Errored Sec 0
Local Mgmt HEC0 5759
Remote Mgmt FEC0 0
Remote Mgmt CRC0 0
Remote Mgmt FECErrored Sec 0
Remote Mgmt Errored Sec 0
Remote Mgmt Severely Errored Sec 0
Remote Mgmt LOSErrored Sec 0
Remote Mgmt Unavail Errored Sec 0
Remote Mgmt HEC0 0
Local TPSTCCell0 30497446
Local TPSTCCell0Upper Layer 1409006
Local TPSTCBit Error 0
Remote TPSTCCell0 181527
Remote TPSTCCell0Upper Layer 10098
Remote TPSTCBit Error 0
PSDMask Status Standard
Status Fail Count 0
Profile Status MAIN
Action Startup
Activate Line None
Line Status false
Host Control Enable
Auto Start true
Failsafe false
Showtime Led 2
Retrain EnableOverallOnly
Defaults None
Line Mode None
Whip Disable
Whip Active Inactive
Happy Mode Enable
PMmode L2L3Allowed
Dying Gasp Enable
Utopia Interface Level1
Physical Port 0
Clock Type Oscillator
Profile MAIN
Detect Noise Disable
Max Interleave D 64
SHalf Disable
Cabinet Mode Disable
PSDMask AnnexM-EU60
Standard G.Dmt.Bis
Ec Fdm Mode EC
Max Bits Per Bin 15
Tx Start Bin 6
Tx End Bin 63
Rx Start Bin 6
Rx End Bin 511
Rx Auto Bin Adjust Disable
Tx Attenuation Bis_0DB
Bit Swap Enable
Bit Swap Up Enable
NTRMode Disable
Code Type ADSL2A
Max Down Rate 511
Capability BIS+/BIS/GDMT/T1413
Coding Gain auto
Framer Type Type3ET
Fast Retrain Enable
Reset Defaults false
Port Snmp If Index 0
Port Snmp If Type 0

SNR depends on two factors: a) the distance from the telephone exchange and b) the line quality. You can determine your distance from the exchange by your line attenuation. If it is more, then you are far away from the exchange. If it is less and you still have lower SNR then it is a line fault. If your friends house is near to your house, you can be sure that it is line fault.

6bB. or below = Bad and will experience no line synchronisation and frequent disconnections
7dB-10dB. = Fair but does not leave much room for variances in conditions.
11dB-20dB. = Good with little or no disconnection problems
20dB-28dB. = Excellent
29dB. or above = Outstanding

Get your line checked.