IP DSLAM with Integrated ATM Aggregation and Interworking

IP DSLAM with Integrated
ATM Aggregation and
Interworking to Ethernet
featuring Total Access 5000
Introduction
The ADTRAN Total Access 5000 is a carrier class Multiservice Access Platform (MSAP)
enabling service providers to evolve to an IP/Ethernet network model while preserving
legacy investments. The Total Access 5000 is designed around a pure IP/Ethernet core that
offers unparalleled bandwidth to each subscriber. The backplane architecture provides a
fully redundant, dedicated dual star bus to each individual slot, supporting up to 80 Gbps
of non-blocking redundant throughput. This bandwidth scalability, combined with the
next generation architecture, ensures a long product lifecycle and long-term investment
protection as bandwidth demands continue to increase.
By providing a simplified migration path to a next-generation IP/Ethernet core infrastructure,
the Total Access 5000 has the ability to help maximize the lifecycle of carriers’ existing
legacy ATM DSLAM base, reduce the cost associated with maintaining legacy ATM switches,
and enable higher speed Broadband Services. In a traditional high speed internet infrastructure, DSL services are provided via ATM based DSLAMs. These DSLAMs are aggregated by
ATM switches/routers which are expensive to maintain as many of them are in an End of
Life state or nearing it. In addition, many ATM switches are reaching port exhaust so critical
bandwidth upgrades can not be realized without major expense. All of these challenges,
in addition to the large embedded base of ATM DSLAMs that terminate subscriber traffic
in the existing network, make the business case for ATM to Ethernet migration via the
Total Access 5000
DSLAMs
ATM Network
Internet
IP
ATM
ATM
Router/Subscriber
Termination
BPON OLTs
Figure 2: Existing ATM-based DSL Network and ATM Core
Figure 2
ATM Aggregation and Interworking to Ethernet
Figure 1: ADTRAN Total Access 5000
BPON OLTs
The Total
Access 5000 allows the aggregation of existing ATM DSL traffic via integrated
Total Access 5000
line modules that terminate incoming ATM PVCs and interwork the traffic to Ethernet.
By using existing VPI/VCI
assignments taken from working
high speed internet database
Ethernet
Ethernet
IP
DSLAMs
ATM
Internet
systems, ATM aggregation modules in the Total Access 5000 can be pre-provisioned with
subscriber information (mapping incoming VCs to VLANs) prior to the physical interface
IP
ATM
ATM
actually being changed.
Once this information
is pre-provisioned
on Internet
theRouter
ATM aggregation
Ethernet Network
Next Generation
modules and the GE uplinks are operational, the physical links can be moved from the ATM
ATM Network
Router/Subscriber
switches toBPONthe
modules at the cross-connect panel.
Termination
OLTs Total Access 5000 ATM aggregation
Subscriber traffic will come up using the pre-provisioned PVC to VLAN mapping, PPPoE or
VDSL2
Figure 2 and the existing ATM based DSLAMs will be
DHCP requests
will be forwarded upstream,
Figure
3
migrated into the new IP/Ethernet core
(Figure
3).
DSLAMs
Total Access 5000
Ethernet
Ethernet
IP
ATM
ATM DSLAM
ATM DSLAM
Ethernet Network
BPON OLTs
Internet
Next Generation Router
ATM DSLAM
ATM
Network
Existing
ATM DSLAM
3 or OC3 Cross Connect
DSLAMs
VDSL2
ATM DSLAM
Migration
Figure 3
Figure 3: Existing ATM DSL Network with Interworking to Next Generation
IP/Ethernet Core)
N x GE
ATM DSLAM
ATM DSLAM
ATM DSLAM
Total Access 5000
Uplink
IP Ethernet
As shown in figure 3, the ATM network goes away once the migration is in place which
means that ATM switches can be decommissioned or at least consolidated. In some applications, the service providers relationship with 3rd party service providers requires that a subset of the ATM network stay in place to be able to provide ATM interconnect to the 3rd party
BRAS. In this case, the Total Access 5000 can support both an ATM and Ethernet network
connection and will allow each DSLAM subscriber to be individually assigned to either the
IP/Ethernet network or the ATM network for a graceful migration from ATM to Ethernet for
the entire network.
In addition to providing a graceful migration path from ATM to Ethernet, The Total Access
5000 will serve as a platform for Broadband Service growth. The Total Access 5000 offers
ADSL2+ and VDSL2 for copper based Broadband Service growth and offers GPON and P2P
Ethernet for fiber based Broadband Service growth. This is important to realize because
when a legacy DSLAM is aggregated and interworked, it still may not support high-speed
services that could be offered from next generation technology due to the limited capability of its line cards; however, once the Total Access 5000 is in place for interworking, new
revenue generating high-speed Broadband Services can be offered directly from the same
system. There are two VDSL2 Access Modules available. Both units are standard compliant
and support multi-pair bonding and fallback to ADSL operating modes. For medium density
applications, the Total Access 5000 can provide up to 320 VDSL2 ports with integrated
splitters per 9 RU shelf. For ultra-high density applications, the 48-port VDSL2 Access
Module provides up to 1008 lines in a 9 RU Total Access 5000 shelf.
In a sample network application, ADTRAN has modeled a representative central office
with 11 existing ATM uplinks from numerous ATM DSLAM shelves. This office has 7,656
installed DSL ports. The Total Access 5000 can aggregate and interwork to Ethernet all
of this subscriber traffic on only three ATM aggregation cards, providing non-blocking
throughput to each individual ATM trunk and ensuring that no additional oversubscription
is introduced as a part of the ATM to Ethernet interworking. This is accomplished via
the 4 port DS3 or 4 port OC3 Access Modules. These modules use a single slot in
the Total Access 5000 chassis and can be inserted in any of the access module slots.
An additional 18 access module slots remain available in the Total Access 5000 chassis
which can be used to provide up to 864 VDSL2 or ADSL2+ subscriber access ports.
Total Access 5000
Alcatel ASAM
ATM
OC-3 or DS3
DS1/DS3/OC-3
ATM
1187020L1
SM
1187020L1
SM
1187010L1
SCM
1187150L1
POTS
1187101L1
1187150L1
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
ADSL
BLANK
SINGLE
POTS
1187010L1
SCM
1187101L1
BLANK
SINGLE
ADSL
BLANK
SINGLE
BLANK
SINGLE
BLANK
DUAL
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
RG
RG
1187020L1
1187020L1
Redundant GE
1187020L1
NET
31
31
23
23
16
1
2
Total Access 3000
16
15
16
1
2
1
2
NET
ACO
TEST
ALM
PWR
ATM
15
TEST
ALM
PWR
TEST
ALM
PWR
CRJ
MAJ
MIN
LAN
HOST
ACO
POTS
SPLITTER
CRJ
MAJ
MIN
LAN
HOST
ACO
NET
RCV 1
24
24
15
CRAFT
2
POTS
SPLITTER
CRAFT
16
1
RCV 1
32
32
15
TEST
ALM
PWR
TEST
ALM
PWR
RCV 2
TEST
ALM
PWR
NET
RCV 2
STBY
ACT
STBY
ACT
APS
APS
ACO
TEST
ALM2
PWR
TEST
ALM2
PWR
GigE Node
Expansion
Total Access 5000
Total Access 1148A
GigE
1187020L1
SM
1187020L1
SM
1187010L1
SCM
1187150L1
POTS
1187101L1
1187150L1
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
ADSL
BLANK
SINGLE
POTS
1187010L1
SCM
1187101L1
BLANK
SINGLE
ADSL
BLANK
SINGLE
BLANK
SINGLE
BLANK
DUAL
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
BLANK
SINGLE
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
1187020L1
RG
RG
1187020L1
1187020L1
1187020L1
NET
31
31
23
23
15
2
TEST
ALM
PWR
1
16
15
2
1
RCV 1
16
TEST
ALM
PWR
CRJ
MAJ
MIN
LAN
HOST
ACO
TEST
ALM
PWR
NET
TEST
ALM
PWR
RCV 2
STBY
ACT
STBY
ACT
APS
APS
ACO
TEST
ALM
PWR
RCV 2
2
POTS
SPLITTER
ACO
TEST
ALM
PWR
15
NET
1
CRJ
MAJ
MIN
LAN
HOST
ACO
NET
24
24
16
CRAFT
2
CRAFT
16
1
POTS
SPLITTER
RCV 1
32
32
15
TEST
ALM2
PWR
TEST
ALM2
PWR
DSL Growth
ILL237A
Figure 4: Sample Office Conversion
(continued on back page)
ADTRAN, Inc.
Attn: Carrier Networks
901 Explorer Boulevard
Huntsville, AL 35806
P.O. Box 140000
Huntsville, AL 35814-4000
256 963-8000
256 963-8699 fax
General Information
800 9ADTRAN
info@adtran.com
www.adtran.com
Pre-sales Support
800 615-1176
application.engineer@adtran.com
The flexible architecture of the Total Access 5000 allows subscriber VCs from
the incoming ATM trunks are mapped to an Ethernet VLAN, with a C-Tag used to
identify the customer and an S-Tag used to identify the ATM trunk. This allows
all traffic from the ATM line modules to be switched into the network using VLAN
tags only, creating a scalable service model for ATM to Ethernet interworking.
The Total Access 5000 Switch Module supports 1 GE up to 4 x 10 GE Ethernet
uplinks for connectivity to the network core and offers full redundancy. These
GigE ports can be bonded together using Link Aggregation (802.3ad), providing
up to 40 Gbps of uplink speed. Small form-factor pluggable (SFP or XFP for
10 GE) optics is used to ensure proper electrical or optical signal support.
In addition to being an industry leading Interworking, Aggregation, and IP
DSLAM as discussed above, the Total Access 5000 also supports many other
critical applications s including broadband loop carrier with GR303, TR-008,
and VoIP based POTS support, Pseudowire emulation of DS1 circuits over Ethernet, Optical and Electrical based Carrier Ethernet, GPON, P2P Ethernet (Active E)
and P-OTS transport. Furthermore, the IP/Ethernet core provides flexibility and
scalability to support the additional growth of new applications as they emerge.
Post-sales Support
888 4ADTRAN (888 423-8726)
support@adtran.com
Summary
The Total Access 5000’s Ethernet architecture allows the deployment of an
advanced packet network infrastructure that is capable of delivering a host of
services. This robust packet network architecture allows carriers to use the
Total Access 5000 to economically address both legacy and next generation
services while providing a seamless migration path towards converged network
architecture. Its integrated packet capabilities and highly scalable architecture
provide flexible aggregation and transport options across multiple network
topologies. As service providers undertake the network evolution required to
deliver these next generation services, ADTRAN’s Total Access 5000 is one
component of an industry leading family of access and transport solutions that
ubiquitously support multiple network topologies, reducing unwanted operational
complexity and maximizing network efficiency. With the ADTRAN Advanced
Operational Environment (AOE) providing a common management application
that supports these technologies and topologies ubiquitously, ADTRAN’s
Total Access 5000 is the right choice for next generation network requirements.
TL19.1270
ADTRAN is an ISO 9001, ISO 14001,
and a TL 9000 certified supplier.
CN021C June Copyright © 2011 ADTRAN, Inc.
All rights reserved. ADTRAN and Total Access are
registered trademarks of ADTRAN, Inc. All other
trademarks mentioned in this document are the
property of their respective owners.