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Forum Discussion
krgoodwin
Aug 20, 2026Apprentice
Can't Call My Brother
I have an RBE972S (RBE971 router with 2 RBE970 satellites) system using a CM2050V cable modem. I can not connect to two telephone numbers that are cell phones on an AT&T network. No known problem co...
Kitsap
Aug 21, 2026Master
While you sort this situation out, recommend you find a plane Jane telephone handset you can plug directly in to the RJ11 (#1) on the back of your CM2050V. This will take Wi-Fi calling completely out of the equation.
HappyCat
Aug 21, 2026Luminary
The Original Post (above) identified two issues:
- Phone system connected to the modem telephone jack would not connect, and
- Phone using WiFi calling would not connect
My understanding is that connecting a "plane Jane" telephone to the modem telephone jack is equivalent to connecting the Panasonic cordless phone base unit to the modem. Amazon sells regular phones for $4.99 (US), so it would not be an expensive experiment to get one.