Summary: We purchased 4 of these cams for a retail security system, and had them professionally installed. They are not doing the job! The software is difficult to configure and to operate. The cams are slow to respond to PTZ commands. The audio is non-existant. Our retail site has DSL with a 2.7 mbs to 3.2 mbs download and a .3 to .5 mbs upload; our monitor site has a 1.2 to 1.6 mbs download and a .3 to .4 upload. Both systems are running XP Pro SP3.
Summary: I have a DCS-6620G and DCS-5300W. They both developed minor problems shortly after the 1 year warranty ran out. The DCS-6620G ethernet port failed and the DCS-5300G pan capability failed. I called DLink tech support and they told me that they will not repair these products or exchange them after the warranty, and that there are no authorized service centers.
Summary: We had a DCS-900 for several years. Other than the occasional re-boot never had an issue. This was the replacement. Right away we never could get 33 of 36 computers to be able to access it (all 36 worked fine with the DCS-900). Technical support was a joke, "lower the security on the computers and remove the old activeX object installed by the DCS-900". Turning off security didn't help (like we were going to do that for any length of time).