Abstract: A telecommunication bantam jack module (10) is illustrated in FIGS. 6-8 for mounting on a standard length 19" or 23" shelf as illustrated in FIGS. 10 and 11 to connect with 64 or 84 circuits respectively. Each module preferably contains four bantam jack assemblies or multiples of four. Each bantam jack assembly (86) includes a jack frame (88) having a width less than 0.250 inches and preferably approximately 0.225 inches. Jack frame (88) has an output sleeve (94), an input sleeve (96) and a monitor sleeve (98). Each of the sleeves has a reduced wall thickness in the horizontal direction at the center line in which the thickness is approximately 0.215 inches. The reduced thickness is approximately 0.019-0.02 inches. In the preferred embodiment, the sleeves (94), (96) and (98) have flats (102) formed on the sides thereof to form the reduced cross section.