The ornamental design for a tablephone, as shown and described.
FIG. 1 is a front top perspective view of a table phone, showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a left side elevation view thereof, the right side elevation view being a mirror image thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken lines consisting of evenly spaced lines in the drawings depict portions of the table phone that form no part of the claimed design, while the broken lines consisting of dash-dot-dash lines in the drawings depict the boundary of the claimed invention and it is understood that the claim extends to the boundary that forms no part of the claimed design.