I have a Synology RT2600ac router.  My JetStream T1600G-52TS is connected to the router via Cat6 cable.  

Navigating to 192.168.0.1 in my browser, I cannot connect to the JetStream switch; no page ever loads.  I've tried using Safari and Firefox on my desktop Mac, and also Firefox on my laptop which is directly connected to the switch via Cat6 cable.  

When I log into my Synology router, I notice that the switch does not appear in the devices list.  It's strange.  As far as I can tell, I'm not having connection problems. Every device in the house that is hard-wired has Internet access at the speed I expect.  

Moreover, I have a Synology MR2200ac mesh router that is configured as a mesh device (no routing function).  It is hard-wired into the switch.  As far as I can tell, the Wi-Fi works as expected.  

Alas, I'm confused.  

I know this JetStream device is a few years old.  I have never updated the firmware manually, and I presume it never updated automatically.  I have never been able to log in the management software, but now I want to start experimenting with my switch.

Any suggestions are welcome.