A communication transmitting module with a rigid light pipe, the communication transmitting module has thereon a protrusion with a pair of recesses near its bottom, and has on its bottom side an engaging block with a bevel surface. The rigid light pipe in the shape of "L" includes an upper and a lower portion, the upper portion is formed thereon an engaging hole for extending therethrough of the protrusion of the communication transmitting module, the engaging hole is formed near it a raised portion engageable in the recesses of the communication transmitting module; and the bottom of the lower portion provided with LEDs has a hook extendible from the bevel surface on the bottom side of the communication transmitting module to engage in the engaging block. The present invention can be easily and firmly assembled.

A modular jack (1) includes an insulative housing (10), a plurality of contacts (20) received in the housing, a LED (4) and a tab (40). The insulative housing has a bottom wall (10b) defining a first slot (16) and a second slot (18) communicated with the first slot. A post (18a) projects from an interior surface of the second slot. The LED comprises an indicator (32) received in the first slot, and a pair of leads (34) extending from the indicator and received in the second slot. The tab is received in the second slot and engaged with the leads. A through hole (42a) is defined in the tab for downward extension of the post.

A modular jack assembly with an indicator comprises a housing (19) made of an insulative material and consisting of two tiers, each tier having at least one through-hole (15) and at least one opening (18a or 18b) for receiving a mating connector. The modular assembly further comprises at least one light transmission means (11D) for transmitting light, which is provided in the through-hole and has a light receiving member (13) at one end for receiving light from a corresponding light source (6a OR 6b) mounted on a board outside of the modular jack assembly and disposed in a line along a rear wall of the housing and an indicator member at the other end for displaying the light to the outside of the modular jack assembly. The transmission means provided in the through-hole of an upper tier extends upwardly from the light receiving member along the rear wall, bent at right angles into an upper wall of the upper tier and then bent diagonally along the upper wall of the upper tier. The light transmission means provided in the through-hole of a lower tier extends upwardly from the light receiving member along the rear wall and bent at right angles into and through an upper wall of the lower tier.

A connector assembly includes a housing having a plurality of receptacles, including a top receptacle, for receiving a plurality of mating plugs. A light guide is operatively associated with each receptacle and its respective mating plug to signal a circuit condition thereof. All of the light guides have front ends viewable at the front of the housing above the top receptacle. Each front end has an indicator to visually indicate the receptacle with which the respective light guide is operatively associated.

A structure for fixing light guide element to an electric connector includes a connector case internally defining at least one socket, and externally provided on a top surface with at least one locating plate above the socket, at least one hold-down tab behind the locating plate, and at least one elastic stopper behind the hold-down tab; and a light guide element consisting of a plurality of parallelly arranged light guide units interconnected via a transverse bridge section having at least one slit formed on a front side thereof. When the straight front end section of each light guide unit is forward extended through a corresponding locating plate, the elastic stopper would abut on a rear side of the bridge section, and the slit on the bridge section would engage with the hold-down tab, enabling the light guide element to be flatly assembled to the top surface of the connector case.