An adjustable modular panel for partially housing data carrying cables and facilitating connection between the cables and communication equipment. The modular panel includes first and second panel portions, each having an engaging edge for mating with each other and for forming between the first and second portions a trough having an area in which the cables are at least partially housed. A fastening device in the panel portions is releasably operable to secure the two panel portions together. Each panel further includes a mounting surface to which connection devices are mountable. In a preferred embodiment, a third panel having a pair of engaging edges is disposed between the first and second panel portions so that the engaging edges of the third panel mate with the engaging edges of the first and second panel portions, thereby expanding the trough area to accommodate an increased number of cables and/or cables having increased dimensions.