FTTO SOHO and SME solutions involve many concepts. Here we mianly talk about FTTO SOHO and SME solutions from user side to network side based on the following FTTO SOHO and SME network diagram.
Scenario
Small office home office (SOHO):SOHO is positioned for miniature enterprises, such as home offices, shops, and markets.
Small- and medium-sized enterprise (SME)
An SME contains 10-300 personnel. SME is positioned for small- and medium-sized enterprises, campuses, and net bars.
User Side
VoD:VoD is known as interactive video on demand. Users can choose their desired programs from the VoD program database. When watching programs, users can perform operations such as pause, fast forward, fast rewind, and locate.
Multicast: Multicast, or broadband TV (BTV) is similar to traditional wired broadcasting or television satellite broadcasting. Users have the same experience in watching BTV programs and traditional television programs. Unlike the traditional television, the IPTV system encodes audio signals into media streams and multicasts the media streams over an IP network to user terminals.
Fax: A communication tool widely used in enterprises and institutions to transmit digital text and images through phone lines.
Point of sale (POS):A terminal supporting multiple functions. After being installed in a promissory shop or designated network of a credit card and accessing the network, the POS machine implements speedy, convenient, and reliable automatic electronic funds transfer. The POS machine supports consumption, advance payment, balance inquiry, and transfer.
Wireless fidelity (Wi-Fi):A short-distance wireless transmission technology, which supports wireless signals for Internet access within hundreds of feet.
Access Side
PON:A passive optical network (PON) uses a point-to-multipoint (P2MP) network architecture. A PON network consists of three parts: optical line terminal (OLT), optical distribution network (ODN), and optical network units (
ONUs). A PON network uses optical fibers for data transmission, supports more users with less optical fiber resources, and provides a higher access rate.
ODN:The ODN is composed of passive optical components, such as optical fibers and one or more passive optical splitters. The ODN provides highly reliable optical channels between
Huawei OLT and ONUs.
OLT:The OLT is an aggregation device located at the central office (CO), which terminates PON protocols. OLTs in this document are
Huawei MA5800.
ONU:ONUs are located on the user side, providing various types of ports for connecting to user terminals. The ONUs communicate with the OLT through a passive ODN.\
Split Ratio:Split ratio is the ratio of dividing a downstream optical signal into sub-signals in the PON system. Greater optical ratio requires more power to support physical distances.
Network Side
U-PE:User-end provider edges (U-PEs) are routing devices directly connected to customer edges (UEs). U-PEs support routing and MPLS encapsulation. If a U-PE is connected to multiple CEs and possesses the basic bridging function, data frame forwarding only needs to be performed on the U-PE. This reduces the load of the S-PE.
PE-AGG:Aggregation provider edge (PE-AGG) routers provide aggregation and route forwarding functions for access equipment. Compared with U-PEs, PE-AGGs features higher performance, fewer interfaces, and higher switching rates.
NGN/IMS:A next generation network (NGN) is a network that uses softswitches as its core and uses open and standardized architectures to provide abundant services such as VoIP, video, and data.
The IP multimedia subsystem (IMS) uses SIP signaling as its call control signaling to provide services such as VoIP, data, and multimedia services.
IPTV head end:The IPTV head end system functions as the contents preparation platform in the IPTV system. It provides functions such as signal receipt, media format conversion, and media material management.
