Portserver II routing with cisco

I have a PS II ip connected to a Micom Marathon ip thru t1 to server Unix on same net ip

I am replacing the micom’s with Cisco2600 ip & Cisco1750 ip I have config the digi PSII with ip do i need to set a route? if so please advice

I believe you’d just need to configure a gateway IP address, so the Portserver II knows how to get out of its own network.