Billion 7401VGP-M only syncs at GDMT 7600

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cjnatan

6 posts

Wannabe Geek

#92088 26-Oct-2011 15:10

Hi there,

I am having some syncing issues which I was hoping to get help with. I wasnt sure if someone had tried this before or been down this road before.. so I though i'd ask. I tried searching google etc with no help.

I have got 2 modems, they both are ADSL2+.

Billion7401VGP-M which is currently using ADSL2+M, however, I tried all modes which all seem to lead to either 7600sync speed or worse. (I will add screenshots later today if needed)

For some reason I cannot change the modulation , which might be the issue as its set to Bis GDMT (thought i'd mention that..)

So far I resetted the modem to its factory settings but no difference. Currently running 5.74d firmware version. My next thought was to downgrade the firmware version to an older version. Anyone tried that?

Anyone has any ideas how to improve the syncing speed on the Billion modem? I'd be happy to try any thing which might help.

The second modem is Netcomm NB6W+4. Syncs at 15mbs. (see full details of connection details below)

maxzzz

91 posts

Master Geek
+1 received by user: 27

#538072 27-Oct-2011 10:38

I also had a Billion, this one a Bipac 7402, and it would not connect at all since I had been connected to a cabinet so I had to change to another router.

One thing to increase the synch speed with these routers is to manually set the "coding gain" to the maximum (I think this was 7).

But this won't make your router properly synch at BIS+ (ADSL2+), which is most likely to be a firmware issue...

cjnatan

6 posts

Wannabe Geek

#538080 27-Oct-2011 10:54

Thanks for your reply :)

Thats what I thought so I was going to downgrade the firmware and see how it goes. Did u downgrade your firmware?

I tried coding 7 btw and it didnt make any difference.

Ragnor

8279 posts

Uber Geek
+1 received by user: 585

Trusted

#538083 27-Oct-2011 11:02

Telecom Wholesale used new Ikanos linecards that support ADSL2+ and VDSL2 amoung other modes in their ISAM's in the cabinets and exchanges, previously they were using a Broadcom linecards.

A small amount of older modem chipsets have issues connecting properly to the new line cards. It's generally accepted the modem/router side is at fault here.

Double check you are running the latest firmware for the device, the 7401VGP-M came out in 2006ish, it looks like the last firmware update was in 2009.

That may resolve the issue for you, if not there is little change for future updated firmware for a product that old to fix the issue, you could try contacting Billion support (they have a decent presence in Australia).

You may just need to get a new modem/router, if updating to the last firmware doesn't work.