1. Project background

In recent years, the broadband service of FTTH fiber-to-the-home communities has developed rapidly. The three major operators have established equal access to their respective constructions, which has caused problems such as high investment costs and repeated construction. In order to avoid repeated construction, a new type of residential FTTH access network construction scheme, that is, FTTH co-building and sharing scheme is proposed.

According to the documentary spirit of the Ministry of Industry and Information Technology, "co-construction and sharing" between telecommunication infrastructures will become the direction of future development, and the construction of large-area residential broadband should be more co-construction and sharing, so that not only under limited investment Realizing the optimal resource allocation, while enriching consumers' choices, also brings convenience to the management of weak cables in the community.

2. Design basis

National norms and standards:

"Code for Engineering Design of Integrated Wiring System" (GB 50311-2016)

"Code for Acceptance of Integrated Wiring System Engineering" (GB 50312-2016)

"Lightning Protection Technical Specification for Building Electronic Information System" (GB 50343-2012)

"Code for Construction and Acceptance of Electronic Information System Computer Room" GB_50462-2008

"Design Specification for Electronic Computer Room" (GB50174-2008)

"Code for Construction Quality Acceptance of Building Electrical Engineering" (GB50303-2002)

"Code for Engineering Design of Fiber-to-the-Home Communication Facilities in Residential Areas and Residential Buildings" (GB50846-2012)

3. Design

1. Program Overview

This solution is aimed at newly-built residential communities. FTTH splitting adopts the first-level centralized splitting mode in the community computer room. A shared ODF fiber distribution frame is set up in the weak motor room of the community. After the operator’s main optical cable comes in, the shared ODF fiber distribution frame is connected. Then perform first-level splitting, and the splitter outlet is directly connected to the corresponding user fiber port on the ODF fiber distribution frame.

Distribute the distribution optical cable from the cell room of the community to the weak current well of the community unit building. Set the corresponding fiber number distribution box in the weak current well according to the number of users. The optical fiber distribution box adopts movable connectors. The incoming distribution cable and the household skin The fiber optic cables are all spliced with pigtails, and then coupled and docked through the fiber optic adapters in the fiber distribution box. After the pigtail cable enters the house, the pigtails are spliced in the user's multimedia information box and then connected to the ONU.

In the entire system, the optical fiber of each user's home is directly connected to the ODF optical fiber distribution frame of the weak motor room in the community. The operator's installation and maintenance personnel only need to jumper the optical fiber on the ODF optical fiber distribution frame of the weak motor room of the community to the corresponding user's home. Complete the opening of the optical path.

2. Scheme topology diagram

方案拓?fù)鋱D

3. Product configuration introduction

(1) Joint construction and sharing of ODF optical distribution frame

This distribution frame is generally placed in the central computer room of the community and used for the end of the optical cable. Its characteristics are as follows:

1. Maximum number of cores: 720 cores

2. Material: cold rolled sheet

3. Plate thickness: 1.2mm (can be customized according to customer requirements)

4. Color: gray (can be customized according to customer requirements)

5. Number of integrated splice trays: 60 (can be increased or decreased according to customer requirements)

6. Integrated splice tray interface: SC/FC/LC optional

7. Size: 2000*800*300mm

共建共享ODF光纖配線架

實(shí)際工程照片

(2) Jointly build and share optical fiber distribution box

The fiber optic distribution box is placed in the weak current well of the corridor, and the number and number of box cores are selected according to the number of users. Its characteristics are as follows:

1. Number of cores: 24/48/72 cores are optional

2. Material: cold rolled sheet

3. Plate thickness: 1.0mm (can be customized according to customer requirements)

4. Color: gray (can be customized according to customer requirements)

5. Adapter panel type: SC/FC/LC optional

6. Size: 440*380*120mm (can be customized according to customer requirements)

共建共享光纜分纖箱

實(shí)際工程照片-1

實(shí)際工程照片-2（分纖箱內(nèi)部照片）

(3) Distribution optical cable

It is used to connect the co-built shared distribution frame and the co-built shared optical fiber distribution box. The number of cores is selected according to the number of specific users. The structure is recommended GYTA. Its characteristics are as follows:

1. Number of cores: 4/6/12/24/36/48/72/96/144 core optional

2. Structure: GYTA

3. Fiber type: G652D single-mode fiber

4. Outer sheath material: PE

5. Optical cable reinforcement core: steel wire

6. Attenuation after cable formation: 1310nm ≤0.36 dB/km; 1550nm ≤0.22 dB/km

GYTA光纜

(4) Cable for entering the house

It is used to connect the weak electricity well of the corridor to build a shared optical fiber distribution box and a user-side multimedia information box. Its characteristics are as follows:

1. Number of cores: 1/2/4 optional

2. Fiber type: G657A single-mode fiber

3. Optical cable diameter: 2.0×5.0±0.2mm

4. Outer cover material: LSZH

5. Cover color: black and white optional

6. Attenuation after cable formation: 1310nm ≤0.4 dB/km; 1550nm ≤0.3 dB/km

入戶皮線光纜

(5) Fiber jumpers and pigtails

光纖跳線及尾纖