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Re:Rotary Cellphone by defnotarobot on Wednesday February 12, 2020 @07:52PM (#22314388)
I've seen some grandstreams that'll run a ringer.
Re:Rotary Cellphone by therealidiot on Thursday February 13, 2020 @01:50AM (#22315839)
Second this, I've had no trouble ringing an old GPO 746 telephone (and very loudly) with a Grandstream HT802