Thread: frequent dissconections

hi

since last mont i m gettin frequent dissconnecions


can u please tell me the reason
i have DNA A2dsl modem

here are the statistics

Statistics -- ADSL
Mode: ADSL2

Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 4.7 8.7
Attenuation (dB): 7.0 2.5
Output Power (dBm): 10.3 19.5
Attainable Rate (Kbps): 5548 1106
Rate (Kbps): 6194 861

MSGc (number of bytes in overhead channel message): 60 13
B (number of bytes in Mux Data Frame): 190 11
M (number of Mux Data Frames in FEC Data Frame): 1 8
T (Mux Data Frames over sync bytes): 1 8
R (number of check bytes in FEC Data Frame): 8 16
S (ratio of FEC over PMD Data Frame length): 0.9815 3.5276
L (number of bits in PMD Data Frame): 1622 254
D (interleaver depth): 32 8
Delay (msec): 7 7

Super Frames: 10651 10755
Super Frame Errors: 0 8669
RS Words: 703030 194966
RS Correctable Errors: 3689 911526
RS Uncorrectable Errors: 0 N/A

HEC Errors: 0 83208
OCD Errors: 0 0
LCD Errors: 0 0
Total Cells: 2523380 447672285
Data Cells: 29 5369167
Bit Errors: 0 5613893

Total ES: 0 2202756
Total SES: 0 2201341
Total UAS: 18 2200883

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Originally Posted by achinbansal

hi


i have DNA A2dsl modem

here are the statistics

Statistics -- ADSL
Mode: ADSL2

Downstream Upstream
SNR Margin (dB): 4.7 8.7
Attenuation (dB): 7.0 2.5
Output Power (dBm): 10.3 19.5
Attainable Rate (Kbps): 5548 1106
Rate (Kbps): 6194 861

Your downstream SNR is very low. It should have a value of minimum 6 dB. It is surprising to note that inspite of having such low downstream attenuation factor u are getting a low SNR. Attenuation and SNR are related. High attenuation results in low SNR and vice versa.

Also try changing the ADSL modulation from ADSL2 to G.DMT

but my G.DMT is already enabled

Originally Posted by achinbansal

but my G.DMT is already enabled

Please checkout your first posting. In it the operating mode is ADSL2. I am saying to set it to ADSL or G.DMT.

Uncheck the rest of the entries and keep the G.DMT only checked. Then u can force the modem to work in G.DMT mode.

Hello everyone ,
I'm having d same problem of frequent DC ...........so wanted to configure my modem from adsl 2 to g.dmt ............ kindly help ..........
my modem being ZTE ZXDSL 831 aii ............

Local SNR margin - 31.5db
Local line attn - 13.0db

remote SNR margin - 26.5db
remote line attn - 6.0db

Downstream line rate - 7997kbps
upstream line rate - 510kbps
it wuld be of additional help if smeone wuld post d whole procedure with pics
thnxxx in advance

Originally Posted by eruptionjoojo

I'm having d same problem of frequent DC ...........so wanted to configure my modem from adsl 2 to g.dmt ............ kindly help ..........

I am surprised when u say u have frequent disconnections because your modem statistics are telling that u have a really stable connection.

Look through the various options present in the web interface of the modem, and u should be able to find ADSL Modulation tab in which u will be able to set the desired modulation from ADSL2+ to G.DMT

Or u can wait for someone who owns this modem to post screenshot of the page.

Modem DNA A211-I ( wireless version ? )
Give correct version.
or confirm this.
http://i37.tinypic.com/2n7jhbk.jpg

http://i19.tinypic.com/6kqygzt.jpg
Keep GDMT/t413/Glite and Bitswap enabled.

Save as jpg picture and post as annexure here.
(See Additional options, when posting a reply )

My SNR margin Downstream 27.3 Upstream 19.6 Attenuation Downstream 26 Upstream 13.9 my current modulation is D.GMT. If I enable to ADSL2+ there is constant disconnection but not when ADSL2. Can I enable ADSL2? Any suggestions? Thanks in advance

Originally Posted by matrix

My SNR margin Downstream 27.3 Upstream 19.6 Attenuation Downstream 26 Upstream 13.9 my current modulation is D.GMT. If I enable to ADSL2+ there is constant disconnection but not when ADSL2. Can I enable ADSL2? Any suggestions? Thanks in advance

BSNL/MTNL currently operates in G.DMT mode. But the default selected by the router is always ADSL2+. U need to manually change it to G.DMT for a much more stabler connection. The DSLAM is configured to be backward compatible with older formats. This is the reason why u are able to connect with DSLAM at ADSL2+/G.DMT. Yes, u can enable ADSL2+, but that is not going to bring forth any speed changes.

Originally Posted by cool_techie_tvm

BSNL/MTNL currently operates in G.DMT mode. But the default selected by the router is always ADSL2+. U need to manually change it to G.DMT for a much more stabler connection. The DSLAM is configured to be backward compatible with older formats. This is the reason why u are able to connect with DSLAM at ADSL2+/G.DMT. Yes, u can enable ADSL2+, but that is not going to bring forth any speed changes.

My question is in ADSL2+ I am getting diconnection where as in ADSL2 not. If I chnage to ADSL2 any benefit over D.GMT? as I am currently in D.GMT

Originally Posted by matrix

My question is in ADSL2+ I am getting diconnection where as in ADSL2 not. If I chnage to ADSL2 any benefit over D.GMT? as I am currently in D.GMT

Since BSNL is operating in G.DMT i would suggest u stick with the same. The maximum benefit will be obtained when the server and the client are operating in the same mode. I would wait for other members to fill in.

Its G.DMT not D.GMT

thanks, let me wait for any other suggestion from other members