Call Router monitors a station for traffic/events and acts on them. You need to route calls in the Axxess to the Call Router monitor station defined in the Call Router App (probably an unplugged station). I'm not sure if intercom calls route or not, so make trunk calls when you test.

In other words, when you say changes were made to have the calls route via internal Call Routing Tables in the Axxess I suspect the DID/DNIS number(s) which originally routed calls to the monitor station were changed to where they ring today. Assuming the OAISYS gear was "bypassed" by this change and not unprogrammed, pointing this/these back to the monitor station may be all you need to do.

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