Technical Discussion
  >> DSL Hardware Discussion


Register (or login) on our website and you will not see this ad.


  Print Thread
Standard User gdavid
(committed) Thu 31-Jul-14 19:38:52
Print Post

Billion 7700N problems


[link to this post]
 
I have had this router for about 3 years now and it keeps dropping the line more than it used to. Sometimes the Internet led will keep flashing, on others it will go off. I don't know if this indicates that there is a problem with it or just a flaky line. I am on a long line - somewhere around 5K from the exchange. Also on a reseller TT line.

I have found that changing the SNR will give a more reliable performace at the sacrifice of speed.

I am wondering if investing in a later model would show any improvement. I see that Billion are now producing the BiPAC 7800DX and the BiPAC 8800NL. Is it worth the investment to upgrade to one of these?

Here are the current stats.

Mode: ADSL_G.dmt.bis
Traffic Type: ATM
Status: Up
Link Power State: L0

Downstream Upstream
Line Coding(Trellis): On On
SNR Margin (0.1 dB): 81 108
Attenuation (0.1 dB): 645 397
Output Power (0.1 dBm): 0 128
Attainable Rate (Kbps): 2292 440

Path 0 Path 1
Downstream Upstream Downstream Upstream
Rate (Kbps): 2473 459 0 0

MSGc (# of bytes in overhead channel message): 61 11 0 0
B (# of bytes in Mux Data Frame): 14 20 0 0
M (# of Mux Data Frames in FEC Data Frame): 16 8 0 0
T (Mux Data Frames over sync bytes): 5 3 0 0
R (# of check bytes in FEC Data Frame): 12 12 0 0
S (ratio of FEC over PMD Data Frame length): 3.638 11.5200 0.0 0.0
L (# of bits in PMD Data Frame): 658 125 0 0
D (interleaver depth): 16 2 0 0
Delay (msec): 12.25 5.76 0.0 0.0
INP (DMT symbol): 1.16 0.76 0.0 0.0

Super Frames: 1900336 1657566 0 0
Super Frame Errors: 647 49 0 0
RS Words: 39720340 1967575 0 0
RS Correctable Errors: 12740 1267 0 0
RS Uncorrectable Errors: 6867 0 0 0

HEC Errors: 5040 20 0 0
OCD Errors: 19 0 0 0
LCD Errors: 19 0 0 0
Total Cells: 177453518 32899149 0 0
Data Cells: 7588191 513453 0 0
Bit Errors: 0 3873 0 0


Total ES: 189 41
Total SES: 5 0
Total UAS: 53 53

Thanks for any help

Regards


David
Standard User youngsyp
(member) Fri 01-Aug-14 11:56:37
Print Post

Re: Billion 7700N problems


[re: gdavid] [link to this post]
 
It might not be the modem/ router that's causing the drops.

Since living in my new build property, my sync rate (down) has decreased by 2Mb/s, despite the same modem/ router being in use (Billion 7800N) and no changes being made on my side of the drop wire.

You'll never know what they've done at the exchange/ cabinet end of your line so you could be wasting your money.
Is it running on the latest firmware? Have you checked the wiring at the master socket? Depending on how it was installed, it could be marginal. You could try changing filters as they do degrade apparently. Perform a 'quiet line' test and see if there's a problem there.

Paul

ISP: Coms.... Soon to be Xilo
Service: Coms Complete DSL100
Exchange: SMYG
MSAN: Broadcom
Router: Billion BiPac 7800N
Attenuation:38.5dB - 40dB
SNRM: 3.4dB (manually set)
Current sync: 9786kbps
Standard User gdavid
(committed) Fri 01-Aug-14 13:19:50
Print Post

Re: Billion 7700N problems


[re: youngsyp] [link to this post]
 
Thanks for your thoughts. I believe that the 7800 series is more tolerant on poor lines than the 7700.

The s/w has been updated and it is running directly from an ADSL faceplate.

It see that you are going over to Xilo. I have been with them for a number of years and have given excellent service - always quick to respond to any problem.

Regards


David

Edited by gdavid (Fri 01-Aug-14 15:45:36)


Register (or login) on our website and you will not see this ad.

Standard User youngsyp
(member) Fri 01-Aug-14 15:17:59
Print Post

Re: Billion 7700N problems


[re: gdavid] [link to this post]
 
The 7800N certainly works well on my line, although not as well as it did. Not that I'm attributing the loss in sync rate to the Billion...

I've moved over to Xilo as of 2 weeks ago. I was hoping they'd 'give back' some of the sync rate I'd lost but, sadly that wasn't to be the case. Touch wood though, the line is certainly less noise prone, judging by the SNRM figures!

As mentioned, the first thing I'd be looking at in your position is the wiring. Are you able to run any tools against the 7700N to monitor line noise? You might see spikes when the sync drops, giving you some evidence to go back to your ISP with...

Paul

ISP: Coms.... Soon to be Xilo
Service: Coms Complete DSL100
Exchange: SMYG
MSAN: Broadcom
Router: Billion BiPac 7800N
Attenuation:38.5dB - 40dB
SNRM: 3.4dB (manually set)
Current sync: 9786kbps
  Print Thread

Jump to