Portion of a Door Phone

FIG. 1 is a front view of a first embodiment of the portion of a door phone illustrating my new design; FIG. 2 is a front view of a second embodiment of the portion of a door phone; FIG. 3 is another front view of the first embodiment of the portion of a door phone coupled to an optional door environment; and, FIG. 4 is another front view of the second embodiment of the portion of a door phone coupled to an optional door environment. Broken lines illustrate an optional environment that forms no part of the claimed design.