Same here Linksys SPA942. Receives incoming calls just fine but outgoing now gets fast busy and displays "
Invalid Number". I noticed in call logs for calls placed from the analog phone port a 1 is now placed in front of all outgoing calls, this was not the case prior to the new firmware. I have tried inserting a 1 in front of outgoing calls on the SPA942 but same result "Invalid Number". If anyone has helpful hints or figures this out please let me know.