We have half a dozen of DSL-604T in service. it seems to be very popular modem/router in Thailand. unfortunately, it doesn't perform well if it is not configured correctly.

Most of routers we seen, come with Australian version of firmware, which is not bad, but D-link people created special version for Thailand only.

There is not much of a difference between firmware kernels build for different countries, except default settings, but we found that flashing router with a proper firmware helps to overcome problems such as dropping ADSL connection and inability to dial up automatically. This prevents router from establishing connection to upstream router when ADSL connection is dropped. Many people found the only way to re-connect is to disconnect router power supply for 10-15 seconds and then reconnect.

Very common problem here in Pattaya is the inability for users to view certain sites, in particular Live (Hotmail), Yahoo and Ebay. Quite often this is the result of an MTU problem.

What is MTU? MTU is a Maximum Transmission Unit, which is the greatest amount of data that can be transferred in one physical frame on the network. In plain English, when your PC requests data from these sites, they use something called Path MTU Discovery to check what size packets to send back to your PC. If the site is unable to check what size packet to send it uses the default MTU of 1500. This is a largest packet size, but in a reality in Pattaya or Phuket, there are certain gateways and routers on the Internet which use a smaller MTU, therefore the packets are too large to be transmitted and are rejected or dropped.

It is the job of Path MTU Discovery to find and report the smallest MTU setting between your PC and the remote site, so that the remote server sends out the correct sized packets. Large packet sizes will have to be fragmented.

What can I do to correct this?

Cannot send e-mails lately? It was working last night, but not work today?

We receive these kind of questions almost every day. ISP in Thailand were always under the pressure by spammers, sending hundred and thousands e-mails every day. Many virus infected computers in internet cafés and offices, equipped with pirated copies of anti virus software do not help situation at all.

How many times you found yourself in a situation when web sites stop loading in your Explorer or Firefox? This is a very common situation with Internet Service Providers (ISP) in Thailand and especially in Pattaya. Both TOT and TT&T are well known for dropping ADSL connections on regular basis.

There are few things you could try to get your connection back.

After release of new Microsoft Internet Explorer 8, few clients reported compatibility issues. Most common web site problems include shifting of site menu to the left and other positioning issues. We offer to fix compatibility problems for our clients free of charge. Please contact our development team.