Multi-line connections (pbx), External and extension telephones, Connecting an external telephone – Brother MFC-J450DW User Manual

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Multi-line connections (pbx), External and extension telephones, Connecting an external telephone | Brother MFC-J450DW User Manual | Page 52 / 143 Multi-line connections (pbx), External and extension telephones, Connecting an external telephone | Brother MFC-J450DW User Manual | Page 52 / 143
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