| http://www.w3.org/ns/prov#value | - It should be noted that while the aforementioned embodiment has been explained using the conventional type telephone sets 25 and 26 as terminals to be contained in the time division switch 12, it is also possible to use a multi-function telephone used in a exchange unit, PHS (personal handy phone system), ISDN (integrated services digital network), and the like, including an image terminal or data
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