Abstract: A unique telecommunication coaxial front access jack and plug assembly 50 is illustrated in FIGS. 3 and 4 for mounting on a front panel 52 of telecommunication terminal equipment in which the front panel has a plurality of front panel apertures 94 to receive jacks 56. Each jack 56 has a barrel housing 80 with a front section 82 projecting into an aperture 54. The front section 82 has a locking groove 104 formed therein for receiving bayonet prongs 142 of a plug sleeve 128. The prongs 142 are positioned at a rear section 136 of the sleeve adjacent a resilient "O"-ring 147 that provides locking compression of the bayonet prongs in the locking groove 104 to prevent inadvertent removal of the plug 124 from the jack 56.