The construction of optical access network has become the telecommunications sector construction projects in the coming period an important part. "Ninth Five-Year" period, the Shanghai Post and Telecommunications of the optical access network construction policy is: First of all, the implementation of fiber to the building (FTTB), through the cabling system is connected with the building, one-step solution to building conventional communications and broadband business communications; on the conditional The commercial implementation of optical fiber to the curb (FTTC), to meet the financial industry, the special requirements of commercial communications; of the new residential area will switch to put the client user-level approach, the fiber extends to the client, to achieve fiber-to- Community (FTTZ), to reduce the length of copper.
In the process of achieving FTTB, fiber-optic public network of Posts and Telecommunications CPE and client private network interface integrated cable systems how to divide, this is a project involving the construction of investment allocation, and the project is completed the operation, maintenance, management and important issues of network security. As the building users with an integrated wiring system and digital program-controlled switches, they often use "self-self-dimensional" approach network, coupled with pledges of Posts and Telecommunications sector system, phone repair barriers, there are strict time requirements, which require clear maintenance, management interface. The use of copper cable into the building, the division of the interface is relatively simple, as long as the building cabling system patch panels next to the reserve position of the cable through Council, the Council will pass by the Bureau of cable wiring terminal module received in the area can. Because the module terminal numbers are not directly linked with the user, the user should install phones in the Council by the Council on the MDF jumper installed to complete the work, and the Council on a security unit within the MDF, can play a protective effect on the switch. The connection shown in Figure 1.
As technology advances, public network switches, user-level by the remote module (RSU) or remote user hub (RLC) extension to the client, so the user circuit without a parent Board MDF directly to the building, shown in Figure 2. The drawbacks are:
(1) whether Cabling System (GCS) patch panels and switches the client is located in a room together or split between two separate, game management and users are negative side, because the user may use an integrated cable system with wire rack jump to answer the phone number, telephone office staff may also use the patch panel cabling system within the integrated wiring jumper, but these are not their job responsibilities.
(2) is not conducive to barrier repair, as the Council officers in determining the barrier position (inside or outside a bureau), it is necessary to belong to the user's integrated cabling system patch panels up testing, if the user's staff should not delay, obstacles repair time commitment can not be guaranteed.
(3) building cabling system patch panel wiring module units usually do not have the installation of security features, extending from the switch to the building point of view, as a protection of MDF on the security unit is necessary, because the building the possibility of being struck by lightning cabling system is small, but the possibility of contact with AC power, or some, in order to avoid the AC power into the program-controlled switches, burned circuit boards, integrated wiring system in the building distribution frame junction with the access network has with normally open contacts necessary to install the security unit.
Based on the above reasons, we propose building cabling system and access network CPE connectivity and interface division shown in Figure 3. Figure 3, connection method, and its essence is the original Mother Board Main Distribution Frame to move equipment to distant users, but the telephone office and the division of the client interface still GCS patch panel for the community, so although the area of the project investment and the machine room by much, but regardless of cabling system patch panels and patch panel access network is a two-bedroom grouped together or located in a room (in engineering practice to grouped suitable), all self-management of their own patch panel , the Council can play a protective effect of patch panels, so that management, maintenance of the interface is very clear, fault location and facilities conducive to safe operation. At present, Shanghai Telephone Office in actual projects have adopted this approach.