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ADTRAN Quad T1 IMA Manual de usuario Pagina 2

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®
The expansion of DSL into medium and low-density markets
has produced an increase in the number of DS1 circuits carry-
ing backhaul ATM traffic from small DSLAMs. Mini-DSLAMs,
remote DSLAMs, and integrated DSL/POTS platforms may not
require DS3 trunks for backhaul traffic. Additionally, high-speed
transport may not be available or cost-effective. Therefore IMA
DS1s remain an effective solution for driving DSL into remote
areas. These numerous DS1 connections within a central office
pose cost and operational challenges of their own.
By aggregating IMA-based DS1s in a single, optimized
platform, service providers can make better use of the high
speed ports available on an existing switch or router.
Benefits of IMA Aggregation
■ Reduces backhaul costs from an end office by optimizing
bandwidth efficiency with packet multiplexing.
■ Saves on expensive switching and routing equipment by
better utilizing existing I/O ports.
ADTRAN’s Total Access 3000 DSLAM is a small, temperature
hardened platform designed to provide broadband access
solutions. For DS1 IMA aggregation, the Total Access 3000
DSLAM provides up to 112 DSX-1 interfaces through
8-port IMA line modules that interface a fully redundant
cell switching fabric.
Using DS3 toward the network, up to 4:1 concentration can
be achieved through IMA aggregation, saving DS3 backhaul
costs. The Total Access 3000 DSLAM occupies 6 inches of
space in a 23-inch rack and is fully NEBS compliant.
System management is accomodated through several
options, from SNMP and TL1 to the ADTRAN Total Access
Element Management System (EMS).
The Total Access Octal DS1 IMA Access Module is a dual-slot
card in the Total Access 3000 DSLAM designed to interface
with the Total Access DS3 or OC-3 Cell Switch Module (CSM).
Each of the eight ports provides DS1 interfaces used to
connect the shelf to an upstream ATM element or to a DS1
IMA unit of a subtended shelf.
The Octal DS1 IMA module can terminate the standard DS1
signal (0 to 22.5 db) or for DSX-1 measured from 0 to 655
feet. In the event that one or more DS1s fail, IMA allows the
remaining operational DS1s to maintain access to the
network.
User access to the Octal DS1 IMA Module is through the
System Controller Unit (SCU) via the system bus of the Total
Access DSLAM backplane. The unit retains provisioning data
in a nonvolatile memory device for recovery after a power
loss and supports optional autoprovisioning through the SCU.
Make Better Use of Core Network Resources
Total Access 3000 Octal DS1 IMA Access Module
Total Access 3000 DSLAM with Octal DS1 IMA Access Modules
Ordering Information for
IMA Aggregation System
Equipment Part #
To tal Access 3000 Chassis (23") 1181001L1
Total Access 3000 Enhanced SCU 1181018L1#P
Total Access 3000 DS3 Cell Switch Module 1181041L2
23" Heat Baffle 1181003L1
23" Fan Module 1181006L1
Octal (8 port) T1 IMA 1181409L2
Total Access 3000 BNC connector 118100xL2
ATM Switch
or Router
To tal Access 3000
IMA Subtended
Elements
ATM Switch
or Router
Central Office
Central Office
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End Office
or RT
IMA Subtended
Elements
To tal Access 3000
DS3
Current IMA Topology
Total Access IMA Topology
DS3/OC-3c
■ Software configurable via menu access or SNMP
■ Supports from one to eight DS1 line interfaces
■ Supports standard T1 MIB 1406 for alarm states
■ Supports up to four IMA groups
■ DS1 or DSX-1 signal
“IMA DS1s remain an effective solution for
driving DSL into remote areas.”
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