The smallest of the value edition 1600 series phones is the 1603.  This phone is a bit unique in that it does not support PoE internally. It requires an adapter or splitter.  The phone can be powered by either by the 5V power adapter that connects to a 110V AC outlet (700451230) or via PoE with the additional PoE splitter (700415607). The small PoE splitter still maintains the Class 2 power rating of the 1603 phone and connects to the same plug as the 5V AC adapter.  Read more for references…


1603 product desc. & SAP codes:

Power Supply Options for IP Phones:

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