FTTB/FTTC Solution

FTTB: indicates fiber to the building. In this scenario, optical fibers are routed from a CO to access devices that locate in buildings, such as in light-current wells or basements. Then, the access devices connect to copper (xDSL) or Cat 5 (LAN) lines that are routed to user homes, implementing service access. FTTB applies to business zones and residential areas with high population densities.
FTTC: indicates fiber to the curb. In this scenario, optical fibers are routed from a CO to access devices that locate at fiber distribution terminals (FDTs) along the curb or in cable distribution compartments/FDTs in residential areas. Then, the access devices connect to copper (xDSL) lines that are routed to user homes, implementing service access. FTTC applies to areas with low population densities.

MDUs are deployed in corridors and connect Cat 5 lines to user homes.

• For the Internet access service, users connect to an MDU using Cat 5 lines and are authenticated by dialing a number through PCs. Each user has a separate account. All user accounts are centrally authenticated and managed on the broadband remote access server (BRAS).
• For the voice service, the MDUs embedded with a voice module provide the VoIP service for users.

MDUs are deployed in corridors or FDTs along the curb, and connect twisted pairs to user homes.

• For the Internet access service, users access the Internet at a high speed using the modems deployed at their homes. Modems are Layer 2 devices and therefore require authentication by dialing a number through PCs. Each user has a separate account. All user accounts are centrally authenticated and managed on the BRAS.
• For the voice service, the MDUs embedded with a voice module provide the VoIP service for users.

MDUs are deployed in corridors or FDTs along the curb. The MDUs provide services for users through home gateways (HGWs) that are deployed at user homes and that use LAN or xDSL upstream transmission.

• The HGWs transmit services upstream to the MDUs using LAN or xDSL ports. In the downstream direction, the MDUs provide the Internet access service for users using FE or Wi-Fi ports and the IPTV service using FE ports.
• The HGWs support Layer 3 functions, such as PPPoE dialup and network address translation (NAT), providing the shared Internet access service for residential users through multiple PCs.
• An HGW connects to a set top box (STB) in the downstream direction, allowing users to preview and order IPTV videos.
• The integrated access device (IAD) built in an MDU provides one or multiple POTS ports for users, meeting the voice service requirements of residential users using one or multiple phone sets.

Indoor MDUs can be deployed in corridors or FDTs along the curb. Outdoor MDUs can be deployed in manholes or mounted to poles or exterior walls. Both indoor and outdoor MDUs provide services for users through the HGWs that are deployed at user homes and that use LAN or xDSL upstream transmission.

• The HGWs transmit services upstream to the MDUs using LAN or xDSL ports. In the downstream direction, the MDUs provide the Internet access service for users using FE or Wi-Fi ports and the IPTV service using FE ports.
• The HGWs support Layer 3 functions, such as PPPoE dialup and NAT, providing the shared Internet access service for residential users through multiple PCs.
• An HGW connects to an STB in the downstream direction, allowing users to preview and order IPTV videos.
• The IAD built in an MDU provides one or multiple POTS ports for users, meeting the voice service requirements of residential users using one or multiple phone sets.

In Ethernet cascading scenarios where MDUs are standalone NEs, the MDUs transmit data upstream to a MAN switch or edge router through GE ports. Alternatively, the MDUs transmit data upstream to the OLT through GE ports and then to a MAN switch or edge router. xDSL access mainly applies on the user side.
The MDU+OLT networking shown in the figure is recommended. In this networking, remote MDU software commissioning is supported.

Outdoor Integrated Access Solution

Access devices are continuously moving downward to be closer to end users. In this case, the devices might be installed outdoor, such as mounted to poles or exterior walls or installed in manholes. The outdoor installation scenarios promote high requirements on environment adaptability and power obtaining for the access devices. Providing a comprehensive outdoor integrated access solution, meeting outdoor installation requirements.

High bandwidth

• 100 Mbit/s access: VDSL2+vectoring
• 1 Gbit/s access: G.fast+vectoring

High environment adaptability

• Outdoor integrated ONU (small form factor-sealed unit)
• Dustproof/Waterproof level: IP68/IP55

Flexible power obtaining

• Local AC power
• Reverse PoE
• Remote power supply (RPS)

Backward Compatible and Future-Oriented SuperVector Speedup

In copper network speedup, various carriers have used VDSL2 + vectoring to achieve 50-100 Mbit/s access. The more advanced G.fast + vectoring solution provides 500 Mbit/s to 1 Gbit/s access at a short distance. However, some carriers require a solution medium to these two solutions. This is SuperVector. On the basis of VDSL2 + vectoring, SuperVector speeds up the copper line rate to 100-300 Mbit/s, which is applicable to broadband coverage for copper line speedup at original sites and remote areas.

Improved bandwidth: Maximum downstream bandwidth is improved from 100 Mbit/s in VDSL2 + vectoring to 300 Mbit/s.

Speedup at long distance: Attainable distance for downstream 100 Mbit/s bandwidth is expanded from about 500 m in VDSL2 + vectoring to 700 m.

Protected site investments: Second speedup at original sites, featuring short TTM and fast return on investment (ROI). This greatly protests carrier investments on FTTC and vectoring sites.