Answer: dialin

AnswerCrossword Clue
DIALINCall to contribute
DIALINConnect via modem
DIALINKind of Internet service
DIALINAccess via phone
DIALINCall
DIALINPhone headquarters
DIALINConnect via phone
DIALINTry to reach a talk show, say
DIALINCall a radio show, e.g.
DIALINJoin a teleconference
DIALINTry to reach headquarters, say
DIALINCall Rush, say