| 主权项 |
1. A dual port pass through midspan comprising:
a first port arranged for connection to a first data terminal equipment over a first data communication cabling comprising 4 wire pairs, said first data terminal equipment arranged to communicate bi-directionally over each pair of said 4 wire pairs of said first data communication cabling; a second port arranged for connection to a second data terminal equipment over a second data communication cabling comprising 4 wire pairs, said second data terminal equipment arranged to communicate bi-directionally over each pair of said 4 wire pairs of said second data communication cabling, said first and second terminal data equipment thereby arranged for a communication speed with each other of at least 1000 megabits per second; a first power sourcing equipment in communication with said first port, said first power sourcing equipment arranged to inject power on two of the 4 wire pairs of the first data communication cabling when the first data terminal equipment is connected to said first port by the first data communication cabling; a second power sourcing equipment in communication with said second port, said second power sourcing equipment arranged to inject power on two of the 4 wire pairs of the second data communication cabling when the second data terminal equipment is connected to said second port by the second data communication cabling; and a passive data pass through connection arranged to pass high speed data signals between said first port to said second port, said passive data pass through connection comprising a direct current blocking circuit arranged to: prevent power from said first power sourcing equipment from appearing at said second port; and prevent power from said second power sourcing equipment from appearing at said first port, wherein said passive data pass through connection comprises 4 pairs of conductors and 8 blocking capacitors, each pair of said conductors arranged to connect a particular one of the 4 wire pairs of the first data communication cabling to a particular one of the 4 wire pairs of the second data communication cabling, wherein each conductor of said 4 pairs of conductors has a particular one of said 8 blocking capacitors connected in line thereof, thereby preventing said power from said first power sourcing equipment from appearing at said second port and preventing said power from said second power sourcing equipment from appearing at said first port. |
