# US 10,502,920 B2 · Terminal enclosure with modular aspects and modules for interfacing with the terminal enclosure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,920 B2 - Document ID: US10502920B2 - Status: Granted - Kind: B2 - Application number: 15/760,175 - Filed: 2016-09-14 - Published: 2019-06-06 - Granted: 2019-12-10 - Earliest claimed: 2015-09-14 - Assignees: CommScope Connectivity Belgium BVBA - Applicants: CommScope Connectivity Belgium BVBA - Inventors: Philippe Coenegracht; Alexandre Caroline M. De Bie; Maddy Nadine Frederickx; Paul Joseph Claes; Geert Van Genechten; Mohamed Aznag; Diederik Houben; Patrick Jacques Ann Diepstraten - Web page: https://patentgrep.com/patent/US10502920B2 ## CPC - G02B 6/4472: {Manifolds} - G02B 6/4444: {Seals} - G02B 6/44526: {Panels or rackmounts covering a whole width of the frame or rack} - G02B 6/44528: {Patch-cords; Connector arrangements in the system or in the box (routing arrangements H04Q1/00)} - G02B 6/4455: {characterised by the way of extraction or insertion of the cassette in the distribution frame, e.g. pivoting, sliding, rotating or gliding} - G02B 6/44775: {Cable seals e.g. feed-through (cable seals integrated to the box seals G02B6/4444; pulling eyes G02B6/44465)} - G02B 6/3825: {with an intermediate part, e.g. adapter, receptacle, linking two plugs} - G02B 6/3891: {Bayonet type} - G02B 6/44465: {Seals} - G02B 6/44515: {Fibre drop terminals with surplus length (without surplus length G02B6/4472)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Aspects of the present disclosure relate to a modular fiber optic distribution system for enhancing installation flexibility and for facilitating adding components to a terminal housing over time so as to delay cost. The system is configured to allow components (e.g., inserts, add-on modules, etc.) to be readily added to the terminal housing over time to expand capacity, provide upgrades and to provide forward and backward compatibility. ## Claims ### Claim 1 A telecommunications apparatus comprising: a terminal housing environmentally sealed and adapted for outdoor use, the terminal housing defining an enclosed interior and an exterior, the terminal housing including at least one exterior module mounting location including a first mechanical connection interface; an add-on module adapted to be integrated with the terminal housing at the exterior module mounting location, the add-on module including a module housing carrying a second mechanical connection interface that interlocks with the first mechanical connection interface to fix the module housing in place relative to the terminal housing; and a seal being carried with the first mechanical connection interface, the seal being adapted to provide an environmental sealed relationship between the add-on module and the terminal housing when the add-on module is coupled with the terminal housing; wherein the first and second mechanical connection interfaces are configured such that the first and second mechanical interfaces can be interlocked without requiring the terminal housing to be disassembled, the module housing including at least one exterior ruggedized connector port for receiving an exterior ruggedized fiber optic connector, the ruggedized exterior connector port being capable of receiving the exterior ruggedized fiber optic connector from outside the module housing and the terminal housing when the add-on module is integrated with the terminal housing, the add-on module also including an optical connection structure for providing an optical connection between at least one optical fiber of the terminal housing and the at least one exterior connector port. ### Claim 2 (depends on 1) The telecommunications apparatus of claim 1, wherein the terminal housing forms a main terminal that is substantially larger in volume than the add-on module. ### Claim 3 (depends on 2) The telecommunications apparatus of claim 2, wherein the main terminal is configured to receive a pass-through cable, and wherein optical fibers of the pass-through cable are accessed within the main terminal. ### Claim 4 (depends on 3) The telecommunications apparatus of claim 3, wherein the main terminal houses one or more splice trays. ### Claim 5 (depends on 1) The telecommunications apparatus of claim 1, wherein the terminal housing functions as an indexing terminal at which optical fibers are indexed in fiber position from one multi-fiber ferrule to another multi-fiber ferrule and at least one optical fiber is dropped, and wherein the at least one dropped optical fiber is optically coupled to the exterior connector port. ### Claim 6 (depends on 5) The telecommunications apparatus of claim 5, wherein the add-on module includes an optical component selected from a passive optical power splitter or a wavelength division multiplexer, wherein the optical component has an input coupled to the dropped optical fiber, wherein the add-on module includes a plurality of the exterior connector ports, and wherein outputs of the optical component are connected to the exterior connector ports. ### Claim 7 (depends on 1) The telecommunications apparatus of claim 1, wherein the add-on module functions as an indexing module at which optical fibers are indexed in fiber position from one multi-fiber ferrule to another multi-fiber ferrule and at least one optical fiber is dropped. ### Claim 8 (depends on 1) The telecommunications apparatus of claim 1, wherein the add-on module includes an optical component selected from a passive optical power splitter or a wavelength division multiplexer, wherein the add-on module includes a plurality of the exterior connector ports, and wherein outputs of the optical component are connected to the exterior connector ports. ### Claim 9 (depends on 1) The telecommunications apparatus of claim 1, wherein the terminal housing includes a plurality of the exterior module mounting locations. ### Claim 10 (depends on 1) The telecommunications apparatus of claim 1, wherein the terminal housing defines a terminal port at the exterior module mounting locations for allowing the add-on module to optically interface with the at least one optical fiber of the terminal housing. ### Claim 11 (depends on 10) The telecommunications apparatus of claim 10, wherein the module housing includes a connection interface portion that mates with the terminal port when the add-on module is integrated with the terminal housing. ### Claim 12 (depends on 11) The telecommunications apparatus of claim 11, wherein the connection interface portion is an extension having a form-factor that matches a form factor of the terminal port. ### Claim 13 (depends on 1) The telecommunications apparatus of claim 1, wherein the optical connection structure includes a fiber optic connector carried with and mounted to the module housing. ### Claim 14 (depends on 1) The telecommunications apparatus of claim 1, wherein the optical connection structure includes a single fiber ferrule or a multi-fiber ferule carried with and mounted to the module housing. ### Claim 15 (depends on 1) The telecommunications apparatus of claim 1, wherein the optical connection structure automatically couples to the at least one optical fiber of the terminal housing when the first and second mechanical connection interfaces are interlocked. ### Claim 16 (depends on 12) The telecommunications apparatus of claim 12, wherein the optical connection structure includes a single fiber ferrule or a multi-fiber ferrule mounted within the extension. ### Claim 17 (depends on 12) The telecommunications apparatus of claim 12, wherein the optical connection structure includes an interior tether that extends from the module housing through the extension and into the terminal housing. ### Claim 18 (depends on 1) The telecommunications apparatus of claim 1, wherein the optical connection structure includes a fiber optic connector housing integrated with the module housing. ### Claim 19 (depends on 18) The telecommunications apparatus of claim 18, wherein the fiber optic connector housing houses a single fiber ferrule or a multi-fiber ferrule. ### Claim 20 (depends on 1) The telecommunications apparatus of claim 1, wherein the terminal housing includes a terminal port offset from the exterior module mounting location, and wherein the optical connection structure includes a tether or a patch cord that extends outside the terminal housing from the module housing to the terminal port.