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The Picture Exchange Communication System (PECS) is a form of augmentative and alternative communication produced by Pyramid Educational Consultants, Inc. Phase 1: How to Communicate During Phase I, the focus is on teaching the student to initiate social communication. 2  The student is taught to approach the communicative partner with a picture of a desired object or food item and place the picture in the trainer's hand, in order to receive the desired reward.
A demarc (an abbreviation for demarcation point) marks the point where communications facilities owned by one organization interface with that of another organization. In telephone terminology, this is the interface between customer-premises equipment and network service provider equipment.