Would it be worth upgrading my ADSL modem?

KyleMac2

Junior Member
Aug 9, 2006
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I was on ntl cable but just moved back to my parents' house that has BT ADSL. My setup is the BT Voyager 205 into a D-Link DGL-4300 router. The 205 is setup with all the zipb bridging stuff and the public IP gets passed to the DGL-4300 but the DNS server doesn't (it's 192.168.1.1 instead of my ISP's defaults but works anyway). Is that normal? I can set the DNS servers manually on the DGL-4300 but surely if it was truly bridging I wouldn't have to? I had a really strange DNS problem with 3 computers on the network yesterday (about 12 hours after changing from DMZ to zipb on the modem) that might be related to this. They were getting the correct DNS server via DHCP, but just wouldn't use it unless it was manually set in Windows. Two of these computers also error on "Clearing DNS Cache" when you "repair" the connection.

One of the main reasons I bought the DGL-4300 is the huge NAT table so that torrents wouldn't crap out my connection. However, even in zipb mode I get the "ATM VC Congested" error on the modem sometimes while running torrents. It seems to happen most often when torrents are about to finish or a short time after beginning to seed, most likely because this is when a lot of connections change over. For a couple seconds when this happens my net basically dies but doesn't actually disconnect. Surely if the NAT on the 205 is really being bypassed then it shouldn't care how many connections I make? Would buying a better modem solve this?

I'm thinking of upgrading to max adsl. My Line Atten is currently 21 and the SNR is 29. When plugged into the main faceplate this changes to 8 and 33 so I'll cable that up nicely when needed. I don't know how much this fluctuates. Would buying a better modem help to negotiate a better speed? I want to get the most out of what I pay for (I have just come from 10mbit/786k cable after all).

If I buy a modem what would be recommended? So many ADSL modems seem to come with USB and NAT crap that are designed for and reviewed by idiots who must have trouble turning their computer on. I'd want an ethernet modem either without NAT rubbish (that's what the expensive router is for) or perfect bridging. So far I've seen the D-Link DSL-300T, D-Link DSL-320T (300T with ADSL2/2+ as far as I can tell), Linksys ADSL2MUE and the X-Modem. ADSL2/2+ support would be nice since it would last longer but not if it means compromising on anything else.
 

JackMDS

Elite Member
Super Moderator
Oct 25, 1999
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Your DSL Modem is a combo Modem/Router.

Unless you want double Routing, connenct the Second Router through a reular port to the Modem/Router.

Oherwise buy a simple External Ethernet Modem.

:sun:
 

KyleMac2

Junior Member
Aug 9, 2006
3
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You didn't even read my post did you?

I know it's a combo router/modem, I even stated that it's in bridging mode. What I asked is whether or not the "ATM VC Congestion" error is the modem still crapping out on too many connections despite the NAT being off. That could also be an error from my ISP, but considering my exchange only serves 250 people and that the error appears with less than 500 connections in uTorrent I can't understand why a DSLAM would have trouble with so little strain.

Why do you suggest buying a "simple external ethernet modem" when I already asked for suggestions for simple external ethernet modems to buy? There is basically none of them on the market so my only hope seems to be a modem that does bridging perfectly.

I fixed the DNS problem mentioned earlier; there was a DNS Relay hidden on the modem.
 

JackMDS

Elite Member
Super Moderator
Oct 25, 1999
29,484
391
126
Yeah, I have a medical condition (Known as AntCrapollities) that creates an aversion to profanities:(, so when I got to the Cr** word I got confused, at the second instance of the word I almost fainted and became amnesic.:shocked:

:sun:
 

KyleMac2

Junior Member
Aug 9, 2006
3
0
0
I can't find the Zoom 5515 on any UK stores, there's no mention of it supporting PPPoA and is 8mbit down/1mbit up really it's limit? That's a bit low.

Maybe you went to a Catholic school, but "crap" isn't a profanity. It's about as offensive as "rubbish". Don't make up weak excuses when you can just admit a mistake.