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Integrated Voice and Data over G.shdsl
Service providers and enterprise customers continue to expand deployment of voice services to remote customers.
While more traditional technologies require separate data and voice systems, advanced QoS mechanisms merged
with high-bandwidth WAN links such as DSL make it possible to effectively combine voice and data traffic in the
same WAN connection without sacrificing quality or reliability. Traffic management is the key element for this type
of deployment. The G.shdsl WAN Interface Cards for the Cisco 1700, 2600 and 3700 support critical QoS
mechanisms that provide a scalable and manageable solution for toll-quality voice transmission, while reserving
ample bandwidth for data service.
• Service providers increase revenue by building differentiated service options based on premium, standard,
or best-effort service classes
• Enterprise customers reduce costs and increaseserviceofferings totheir remote branch offices by delivering voice
connectivity without the high costs of dedicated voice links.
(See the “QoS” section of this document for more details on IP and ATM QoS features.)
Business-Class Security
The 1700, 2600 and 3700 can be optimized for virtual private networks (VPNs). VPNs allow for secure use of any
shared network incorporating the same policies and levels of security and performance as a private network.
The Cisco1700, 2600 and 3700 Series provide VPN security through hardware-based 3DES IPSec and Advanced
Encryption Standard (AES
1
) encrypted tunneling at speeds of up to 90 Mbps. VPN capability over G.shdsl allows
for secure access to corporate networks without the costs and limitations associated with point-to-point links.
In addition, the Cisco 1700, 2600 and 3700 Series incorporates Cisco IOS Firewall technology (CiscoSecure
Integrated Software) supporting stateful firewall and intrusion detection functionality. With an always-on DSL
connection, Internet security is a critical component in protecting corporate resources from malicious attacks.
Interoperability
The G.shdsl WAN Interface Cards are based on the Globespan chipset and operates when connected back-to-back
or when connected to a DSLAM.
Customers can deploy G.shdsl WAN Interface Cards in a back-to-back configuration to take advantage of existing
copper wiring in a building, campus, or neighborhood where DSLAM aggregation equipment is either notneededor
financially justified. In back-to-back mode,one sideof the connection is configured in Central Office (CO)modeand
will provide similar functionality to that of a DSLAM.
1. AES on the 1700, 2600 series is software-based.
(6 pages)
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