Comcast Business Routing

I am helping out a small business with a routing issue and I just can't seem to figure it out. Hopefully you guys can help me out.

They are using Comcast Business Gateway.

Public IP: a.b.c.250

Public Gateway: a.b.c.249

Attached to the Comcast Modem Port 3 is a router. On the Comcast side it has an IP of: 10.1.10.10, on the router side it has an IP of 192.168.0.1. Attached to that router is a switch. The router side of the switch has an IP of 192.168.1.1 and the switch side has an IP of 192.168.1.20.

There is a device plugged into the switch with an IP of 192.168.1.241. The device communicates with a 3rd Party for monitoring over ports 3000-3050. I also have a Windows PC plugged into that switch with an IP of 192.168.1.240.

I can get out to the internet just fine from the Windows PC. So, I am assuming that the 192.168.1.241 device can as well. However, the 3rd Party Monitoring Company is not able to establish a connection with the device.

If I plug an additional computer into the switch, I can ping everything on that switch. I plug into the router, I can still ping the devices. However, once I plug into the Comcast modem I can no longer ping anything on the 192.168.0.0/23 network.

I created a Port Forwarding Rule for Ports 3000-3050 to forward to port 10.1.10.10 and I created a Static Route with the following values:

Destination IP: 192.168.0.0

Subnet Mask: 255.255.254.0

Local LAN Gateway IP: 10.1.10.10

Applied the settings, even rebooted the Comcast Modem and I still could not get over to the 192.168.0.0 network. A trace route from the Comcast Modem would go: 10.1.10.10 --> Time out --> 90.x.y.z then die.

Comcast told me their modem is in "Pass-Through mode" but won't help me beyond that. Any tips/tricks/suggestions are more than welcome!

Thank you in advance!