13.1 Overview of Enterprise Access Service
This topic describes the basic knowledge about the enterprise access service. Before configuring
the enterprise access service, you are advised to learn about the basic knowledge.
13.1.1 Basic Concepts
The enterprise access solution involves multiple concepts. This topic describes the basic
concepts by layers (from the user side to the network side) based on an enterprise access service
network diagram.
Network Diagram of Enterprise Access Service
NGN/IMS
Splitter
OLT
ONU
PRA PBX
ONU
Access Side Network SideEnterprise Side
SDH
DDN Node
Machine
Protocol
Converter
DDN
Digital Terminal
V.24/V.35
E1
Switch
IP PBX
Switch
IP network
E1/STM-1
G
E
/
1
0
G
E
User Side
Concept Description
IP PBX IP private branch exchange (PBX) is an IP-based enterprise telephone
exchange system. IP PBX uses ICT technology to seamlessly integrate
voice communication into the data communication network of an
enterprise, simply network architecture, and provide better voice
communication between branches of the enterprise.
PRA PBX PRA PBX, that is, TDM PBX, also called a switch, is a telephone
exchange used within an enterprise. With the PRA PBX, staff in the
enterprise can use internal telephones to make free calls by dialing short
numbers. Outgoing calls are made through a unified trunk. PRA PBX
can lower costs and improve work efficiency for the enterprise.
SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Commissioning and Configuration Guide 13 FTTO Configuration (Large-sized Enterprise Access)
Issue 01 (2014-04-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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