lemireslowvoltage

How do you plan to connect this remote trigger to the DVR? Also this would mean you would need 24/7 monitoring of all video feeds for someone to trigger an alarm.

Any internal to internal network connections are not routed out to the internet, your router will know its internal traffic and keep it as such. You will still have the ability to record and view on your internal network.

Seems like it may be a bad codec to me.

IP cameras with a wireless bridge would work.

If you are out of ports on the DVR are you planning on turning something into an NVR/Hybrid unit to record these additional cameras?

What are your concerns with the POE? I would recommend a separate hard drive for the OS and the recordings. Remember you are limited to 300FT with Ethernet.

Beyond the size make sure you get a class 10 SDHC card, you will need the faster read write speeds.

My guess would be one of the required ports is forwarded or in use on the router in question and is causing problems. Have you verified the port forwarding on the router to ensure no conflicts?

also be sure all cables have made it correctly into the connector, I see this all the time where the cables haven't made it in correctly resulting in spotty connections. If you do this for a living go with the EZ-RJ45 connectors, you can see the cable come out the end of the connector to verify everything is good.

If I had to go with one of the two I would go with the Lorex, they have good customer support and are within your price range.

Not sure if you have ADI or Tri-ed down your way but they would be two more options.

Are you looking to go from analog to digital or are you looking to use a balun to send a BNC signal over ethernet?