Peerless Industries KX-TDA30 用户手册
1.1 Incoming Call Features
Feature Guide
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This feature can also restrict calling a doorphone from an extension on a COS of the
extension and a COS of the doorphone port basis. Each doorphone port can be assigned
a COS. (
extension and a COS of the doorphone port basis. Each doorphone port can be assigned
a COS. (