Been having a bit of fun and games with ADSL since moving house. Have had the issue checked out, and other than some extra unused wiring in the house, which the Telstra tech disconnected, there are no known issues on the line. The Telstra tech's test unit can sync at nearly 4Mbps, and a Bigpond router (not sure what brand these are) will sync at 4.2 Mbps. However, I haven't had so much luck. A loan Netcomm router from Internode was able to hold just under 3 Mbps, which was acceptable, however, that has since been returned. According to Internode, the line is 4.6km long, and I can expect 3-4 Mbps. What I'm looking for is a router that is known to work well on long lines. Doesn't need to be anything fancy, I will most likely put it into bridge mode and put the existing router behind it (which will give me VoIP, IPv6, etc). Just need something that can hold sync at a reasonable throughput on a long line. -- 73 de Tony VK3JED http://vkradio.com
On Tue, May 28, 2013 at 8:26 AM, Tony Langdon <vk3jed@gmail.com> wrote:
Been having a bit of fun and games with ADSL since moving house. Have had the issue checked out, and other than some extra unused wiring in the house, which the Telstra tech disconnected, there are no known issues on the line. The Telstra tech's test unit can sync at nearly 4Mbps, and a Bigpond router (not sure what brand these are) will sync at 4.2 Mbps. However, I haven't had so much luck.
When it comes to ADSL modems, it's the chipset that matters, not the brand. If you're that far away from the exchange, definitely try and find something with a broadcom chipset, and avoid trendchip chipsets at all costs. Any of the cheap tp-link 8950 or 8960 for example have broadcom chipsets and should do a very good job as a bridged modem. Cheers -- Aryan
On 28/05/13 08:26, Tony Langdon wrote:
Been having a bit of fun and games with ADSL since moving house. Have had the issue checked out, and other than some extra unused wiring in the house, which the Telstra tech disconnected, there are no known issues on the line. The Telstra tech's test unit can sync at nearly 4Mbps, and a Bigpond router (not sure what brand these are) will sync at 4.2 Mbps. However, I haven't had so much luck.
A loan Netcomm router from Internode was able to hold just under 3 Mbps, which was acceptable, however, that has since been returned. According to Internode, the line is 4.6km long, and I can expect 3-4 Mbps. What I'm looking for is a router that is known to work well on long lines. Doesn't need to be anything fancy, I will most likely put it into bridge mode and put the existing router behind it (which will give me VoIP, IPv6, etc). Just need something that can hold sync at a reasonable throughput on a long line.
The best indication of what you will get is the Loss and SNR margin that you can find on the modem's web interface. Distance is only a partial indicator, weight of copper is the other. For lines put in over the last 40 years that figure is "cheap". Quality of junctions also matters - I just had Telstra around to deal with one of them - even voice calls failed with water-caused crackle. I'm about a Km closer than you and I get 6.4Mb at a SNR of 7 dB, loop atten 37 dB (the Draytek Vigor120 I'm using gives slightly different info to the Netgear DG834N I was using). The Vigor 120 has an Infineon chip apparently. That data rate is for Internode's "ADSL2+ High Speed" profile. Now the dud junction is gone it has been rock stable. In fact this has prompted me to put in a profile change to Very High Speed. Fingers crossed. While I was typing that, the change happened: 7.2Mb at 4 dB SNR, got a CRC error at lockup 20 min. ago, none since. Is good! For these various profiles the faster the speed, the lower the SNR. The thing to watch is the Rx CRC error rate and the stability of the SNR.
On 28/05/13 6:22 PM, Allan Duncan wrote:
The best indication of what you will get is the Loss and SNR margin that you can find on the modem's web interface.
Distance is only a partial indicator, weight of copper is the other. For lines put in over the last 40 years that figure is "cheap". Quality of junctions also matters - I just had Telstra around to deal with one of them - even voice calls failed with water-caused crackle. I'm about a Km closer than you and I get 6.4Mb at a SNR of 7 dB, loop atten 37 dB (the Draytek Vigor120 I'm using gives slightly different info to the Netgear DG834N I was using). The Vigor 120 has an Infineon chip apparently. Well, the line is 4.6km according to Internode, and various modems have got speeds ranging from 1 to 4.2 Mbps. The Fritzbox was managing 1Mbps with some tweaking. However, I have managed to make a considerable improvement by puting an old D-Link DSL-502T into bridge mode and setting it for ADSL 1 (G.dmt). This has increased my speed to 3.6 Mbps, which is in the range I would regard as acceptable. Interestingly, this modem wouldn't sync at all in ADSL 2+ mode. Other modems tried include a Netcomm modem (loan unit) at 2.8-3.0 Mbps, and a Bigpond modem at 4.2 Mbps.
Unfortunately, I am unable to check the SNR margin on the D-Link easily, because I can't access its web interface due to routing issues, unless I take the router out of circuit, and connect a PC directly to the modem, or add a switch, so I can connect a PC at any time (the web interface and DHCP server do remain active for the LAN port in bridge mode). From memory, I think it was around 6 or 7 dB at 3.6Mbps sync speed.
That data rate is for Internode's "ADSL2+ High Speed" profile. Now the dud junction is gone it has been rock stable. In fact this has prompted me to put in a profile change to Very High Speed. Fingers crossed.
I'm on a Telstra exchange here, so can't access line profiles. No choice. Optus is in town, but effectively can't get Optus powered services due to RIMs and/or pair gain on the Optus network (the coverage checker says you can go through Optus, but the change request will fail - I've tried at two different addresses). Internode will probably never install a DSLAM out here. As for NBN, it's still more than 3 years away (i.e. not on any of the rollout schedules yet :( ). -- 73 de Tony VK3JED http://vkradio.com
On 29/05/13 12:09, Tony Langdon wrote:
On 28/05/13 6:22 PM, Allan Duncan wrote:
The best indication of what you will get is the Loss and SNR margin that you can find on the modem's web interface.
Distance is only a partial indicator, weight of copper is the other. For lines put in over the last 40 years that figure is "cheap". Quality of junctions also matters - I just had Telstra around to deal with one of them - even voice calls failed with water-caused crackle. I'm about a Km closer than you and I get 6.4Mb at a SNR of 7 dB, loop atten 37 dB (the Draytek Vigor120 I'm using gives slightly different info to the Netgear DG834N I was using). The Vigor 120 has an Infineon chip apparently. Well, the line is 4.6km according to Internode, and various modems have got speeds ranging from 1 to 4.2 Mbps. The Fritzbox was managing 1Mbps with some tweaking. However, I have managed to make a considerable improvement by puting an old D-Link DSL-502T into bridge mode and setting it for ADSL 1 (G.dmt). This has increased my speed to 3.6 Mbps, which is in the range I would regard as acceptable. Interestingly, this modem wouldn't sync at all in ADSL 2+ mode. Other modems tried include a Netcomm modem (loan unit) at 2.8-3.0 Mbps, and a Bigpond modem at 4.2 Mbps.
Unfortunately, I am unable to check the SNR margin on the D-Link easily, because I can't access its web interface due to routing issues, unless I
Yes, this was a pain when I went to the bridged single port modem, but I had a spare 5 port switch that now lives in between the modem and router.
take the router out of circuit, and connect a PC directly to the modem, or add a switch, so I can connect a PC at any time (the web interface and DHCP server do remain active for the LAN port in bridge mode). From memory, I think it was around 6 or 7 dB at 3.6Mbps sync speed.
That data rate is for Internode's "ADSL2+ High Speed" profile. Now the dud junction is gone it has been rock stable. In fact this has prompted me to put in a profile change to Very High Speed. Fingers crossed.
I'm on a Telstra exchange here, so can't access line profiles. No choice. Optus is in town, but effectively can't get Optus powered services due to RIMs and/or pair gain on the Optus network (the coverage checker says you can go through Optus, but the change request will fail - I've tried at two different addresses). Internode will probably never install a DSLAM out here. As for NBN, it's still more than 3 years away (i.e. not on any of the rollout schedules yet :( ).
On 29/05/13 12:57 PM, Allan Duncan wrote:
Yes, this was a pain when I went to the bridged single port modem, but I had a spare 5 port switch that now lives in between the modem and router. That would help, don't think I have a spare switch kicking around though. :(
-- 73 de Tony VK3JED http://vkradio.com
On 29/05/2013 12:57 PM, Allan Duncan wrote:
Unfortunately, I am unable to check the SNR margin on the D-Link easily, because I can't access its web interface due to routing issues, unless I
Yes, this was a pain when I went to the bridged single port modem, but I had a spare 5 port switch that now lives in between the modem and router.
Here's another solution, I use this with my router box: /etc/rc.d # cat rc.local #!/bin/sh ifconfig eth2 add 192.168.1.1 ifconfig eth2:0 broadcast 192.168.1.255 netmask 255.255.255.0 route add -host 192.168.1.241 gw 192.168.1.1 It allows me to access the modem via ssh port forwarding on http://127.0.0.1:241 If you want a Billion 5102 modem, (with 4 port switch), which you can use as a switch only or maybe even a replacement for your D-Link modem, then I am happy to send you one for no cost. Cheers A.
On Wed, May 29, 2013 at 12:09:13PM +1000, Tony Langdon wrote:
Unfortunately, I am unable to check the SNR margin on the D-Link easily, because I can't access its web interface due to routing issues, unless I take the router out of circuit, and connect a PC directly to the modem, or add a switch, so I can connect a PC at any time (the web interface and DHCP server do remain active for the LAN port in bridge mode). From memory, I think it was around 6 or 7 dB at 3.6Mbps sync speed.
what sort of router are you using? if it's running linux, you may be able to do port-forwarding or run a simple http/https proxy so that connections from your LAN (i.e. your PC) to a particular port on your router get forwarded to port 80 or 443 on your d-link modem. otherwise, if you have a linux machine that's on 24/7 (or at least, on whenever you want internet access), you might want to think about getting rid of the router and using your linux machine instead. or replace the router with a low-power linux laptop (built-in UPS but mediocre networking) or mini-ITX machine (good NICs, wifi). craig -- craig sanders <cas@taz.net.au>
On 29/05/13 3:29 PM, Craig Sanders wrote:
what sort of router are you using?
if it's running linux, you may be able to do port-forwarding or run a simple http/https proxy so that connections from your LAN (i.e. your PC) to a particular port on your router get forwarded to port 80 or 443 on your d-link modem. That isn't an option. It can't even see the d-link. The Ethernet interface doesn't get an IP address, only the PPP interface gets an IP when PPPoE comes up. Pings get rejected by a router further downstream, so it's obvious that they're not going where I want. I can't see a way of accessing the d-link without a switch (or using a totally different router).
otherwise, if you have a linux machine that's on 24/7 (or at least, on whenever you want internet access), you might want to think about getting rid of the router and using your linux machine instead. or replace the router with a low-power linux laptop (built-in UPS but mediocre networking) or mini-ITX machine (good NICs, wifi). No Linux machines running 24x7 atm, and those available aren't ideal - Raspberry Pi and a couple of EeePC 900 netbooks running Debian - the days of a desktop running 24x7 here are long gone. Would take quite a bit of work to replace, as I'm also running VoIP (with one analog phone and at least a couple of IP handsets, as well as QoS on the router.
-- 73 de Tony VK3JED http://vkradio.com
On Thu, May 30, 2013 at 05:20:18PM +1000, Tony Langdon wrote:
On 29/05/13 3:29 PM, Craig Sanders wrote:
what sort of router are you using?
if it's running linux, you may be able to do port-forwarding or run a simple http/https proxy so that connections from your LAN (i.e. your PC) to a particular port on your router get forwarded to port 80 or 443 on your d-link modem.
That isn't an option. It can't even see the d-link. The Ethernet interface doesn't get an IP address, only the PPP interface gets an IP when PPPoE comes up. Pings get rejected by a router further downstream, so it's obvious that they're not going where I want. I can't see a way of accessing the d-link without a switch (or using a totally different router).
too bad. have you tried manually adding an IP address to the router's ethernet interface? this may be difficult or impossible unless it's running linux and you have shell access to it. i've got my adsl modem (in bridged mode) connected to one of the two NICs on my main machine (gateway/firewall/server/desktop), with 192.168.1.1 on that interface as well as the PPPoE (the modem itself defaults to 192.168.1.254). at various times, i've had netcomm, d-link and another brand i can't remember as the bridging modem. it's currently a billion 7401. i've had no trouble accessing the modem's web admin interface, shell, and snmp over the 192.168 IP address. e.g. a trivial little snmp script i wrote ages ago (so long ago i can't even remember if the snmp OIDs are generic or specific to the billion modem): # get-billion-sync-speed.sh Down: 14001700 Up: 1023900 #! /bin/bash MODEM='192.168.1.254' DN=$(snmpget -v1 -c public -Ov -Oq "$MODEM" '1.3.6.1.2.1.10.94.1.1.4.1.2.3') UP=$(snmpget -v1 -c public -Ov -Oq "$MODEM" '1.3.6.1.2.1.10.94.1.1.5.1.2.3') echo "Down: $DN" echo " Up: $UP" craig -- craig sanders <cas@taz.net.au> BOFH excuse #339: manager in the cable duct
participants (5)
-
Allan Duncan -
Andrew McGlashan -
Aryan Ameri -
Craig Sanders -
Tony Langdon