Ace ACE-3205, Инструкция по установке и эксплуатации

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ACE-3105, ACE-3205 Ver. 5.2 Overview 1-1
Chapter 1
Introduction
1.1 Overview
ACE-3105 and ACE-3205 are advanced multiservice aggregation units, optimized
for transporting voice, video and data in 2G, 2.5G, 3G and 3.5G cellular backhaul
applications. Both units provide aggregation abilities that are best suited for
cellular operators and carriers.
All functional features of ACE-3105 and ACE-3205 are identical. The two units
differ in their physical size, the number and available types of DSL ports, the
number of E1/T1 ports, and the number/position of power supplies. This
Installation and Operation Manual describes both products together, referring to
them as "ACE-3105, ACE-3205".
Typically located at the BTS or Node B site (cell site), ACE-3105, ACE-3205
aggregates traffic from N x E1/T1 and Ethernet interfaces, and transmits the
traffic over ADSL2+ and/or G.SHDSL uplinks. ACE-3105, ACE-3205 provides
different aggregation/switching abilities over different types of networks:
•
Over DSL - backhauling data and voice traffic over two separate transports
DSL networks, using the dual uplink in order to backhaul voice (RT – delay
sensitive) traffic over SHDSL and/or data traffic (HSDPA) over ADSL2+.
• Over packet-switched networks (PSNs) – aggregating multiservice protocols
(ATM and TDM) over packet-switched networks, such as Ethernet, MPLS and
IP networks, by utilizing pseudowire (PW) connections that are established by
ACE-3105, ACE-3205 over the PSN. These virtual pseudowires comprise
uniquely-formatted Ethernet packets, which provide complete emulation of
ATM/TDM services (UNI/IMA/CES/SAT) over all types of packet-switched
networks.
Since traffic timing synchronization plays a critical role in cellular backhaul
applications, ACE-3105, ACE-3205 can distribute the timing in adaptive mode
over packet-switched networks. In addition, and more typically, an optional
hardware component allows ACE-3105, ACE-3205 to recover the timing from a
dedicated PW clock stream received from the PSN, as well as NTR timing using
G.SHDSL interfaces.
Additional features of ACE-3105, ACE-3205 include the following:
• Advanced pseudowire connectivity verification using VCCV-BFD messages
•
End-to-end fault propagation between legacy and packet-switched networks
• A choice of clock synchronization modes
Note