Panasonic KX-TD612CE Installation Manual page 16

System Outline
• It is recommended that the extension of jack 1 is a display proprietary telephone.
• Parallel connection of telephone is possible. Refer to section 2.4.4 EXtra Device Port
(XDP)/Parallelled Telephone Connection.
• Extension jacks 1 to 4 are available for eXtra Device Port(XDP) connection. Extension
jacks 5 to 8 are only for single line telephone.
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Installation Manual