EM7511 error when issuing any AT command

Other than AT!RESET I am getting “error” shortly after any AT command response that has data other than OK. Any ideas on what’s going on? Modem is used in a router that allows me to issue AT commands. Tried on a Linux PC and two Windows PC’s and cannot seem to get any response from it at all (other than NMEA data if I listen on that port). Also have an MC7354 doing the same thing so I hope it’s just an error in settings from the router.

have you tried to re-download some FW to it?