Huawei SmartAX MA5603T Configuration Manual page 842

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide
Concept
Split Ratio
PTP Ethernet
cascading
FTTB
FTTC
Network Side
Concept
U-PE
PE-AGG
NGN/IMS
Issue 01 (2014-04-30)
Introduction
Split ratio is the ratio of dividing a downstream optical signal into
subsignals in the PON system. Greater optical ratio requires more power
to support physical distances.
On a point to point (P2P) Ethernet cascading network, the OLT uses P2P
Ethernet access board and optical terminal to provide FTTx access to
subscribers. The OLT can provide the combined service of video, voice,
and data to meet application requirements of next-generation access
devices.
Fiber to the building (FTTB) applies to medium- and high-density
apartments or office buildings. The OLT is connected to the ONU
(deployed in the corridor) through optical fibers, and the ONU is then
connected to users through twisted pairs to provide users with the voice,
data, and video services.
Fiber to the curb (FTTC) applies to scattered apartments and industrial
parks. The OLT is connected to the ONU (deployed in the hole at the
curb or FAT on a telegraph pole) through optical fibers, and the ONU
is then connected to users through twisted pairs to provide users with
the voice, data, and video services.
NOTE
The difference between FTTB and FTTC is the ONU position. To simply
description, this document uses FTTB and FTTC, indicating that both FTTB and
FTTC networks are supported.
Introduction
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.
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.
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.
NOTE
NGN/IMS in this document refers to softswitches that support H.248 and SIP.
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