tailieunhanh - ProPatch® Miniature Series

The ProPatch® Miniature (PPM) Series is an all new Super High-Density Coax (SHDC) patching system designed for High Definition (HD), SDI, AES audio, and audio applications where coax medium is preferred but space is at a premium. The system is available in both 1 and rack unit configurations. The 1 rack unit panel features a patent-pending pullout designation strip that dramatically increases space for text, and a high-density 2x48 circuit configuration of ports. The rack unit panel features 4x48 ports | FTTN for Broadband Overlay Distribution Intercept Enables Familiar Practices Lower Costs APPLICATION NOTE Introduction Fiber-to-the-node FTTN is a highly successful architecture deployed worldwide that uses existing copper distribution pairs for broadband service delivery. By placing fiber-fed DSLAMs near existing cross boxes or even deeper into the network and creating distribution areas sized 3 000 to 5 000 feet service providers are able to provide subscribers with 25 to 30 Mb s. In fact for smaller distribution areas such as high density city blocks and multiple dwelling units MDU and depending on what technology is used broadband service over existing copper pairs can range from 30Mb s to 50 Mb s and above. This is just with today s xDSL technology. Method for Broadband Overlay Today s method for xDSL overlay is proven interrupt the customer s existing voice circuit re-route dial tone into the DSLAM which combines low frequency voice and high frequency data onto the same pair and then re-connect the combined POTS xDSL output to the cable pair serving the customer. For customers within 3 to 5 kft of the central office CO established craft practices and infrastructure within the CO suits this method just fine. The DSLAM is terminated on the main distribution frame MDF on a block labeled inputs and outputs. To deploy broadband service the frame technician simply disconnects the jumper that connects the switch voice circuit to the outside plant cable pair runs a new jumper from the switch port to the input of the DSLAM and a jumper from the output of the DSLAM back to the outside plant cable pair. This is standard operating procedure. Yet once you leave the structured CO environment for the outside plant broadband overlay introduces new challenges. Situation 1 There are many existing customers within 3 to 5 kft of a DLC-fed cross box where feeder and distribution cables have appearances. Here cross connect jumpers connect the customer s cable pair with the dial .