How to telnet to an IP address on a specific port?

Problem

Can anyone tell me how to telnet to an address using a specific port? I've tried the following: I suppose a route just hasn't been set up between the two hosts? What I am trying to do is this. We have a medical device – a ventilator. it is connected to the network via a converter box called ECOV-110 on this ip address. This device, displays messages when it gives oxygen and other things it does for the patient. We would like to capture these messages, and update the Patients record in the database. So I am trying to to the Ecov 110 and see if there is any data there to capture.