Phone 16

Gives an extra 16 Plain Ordinary Telephone (POT) ports for use with simple telephones. Same usefulness as the IP400 Phone 16 V2 yet with coordinating outside of IP500 control unit.it supported by IP Office core software level 2.1(36) minimum IP403, IP406 V1, IP406 V2, and IP412. And compactable with IP500 running R4.2 or earlier; Professional Edition is required, IP500 running R5.0 or higher and IP500 V2 running R6.0 or higher