Cisco CISCO827-4V-RF Datasheet download pdf (Page 4)

Cisco Systems, Inc.

Page 4 of 14

Figure 2:

The Cisco 827-4V router, which supports VoIP (and voice over ATM VoATM, allows service providers to offer multiple lines of toll-quality voice

service with high-speed data access over a single pair of copper wires.

Differentiated Classes of Service

TheCisco827-4V business-class ADSL routerenablesserviceproviders to increaserevenueby building differentiated

service options based on premium, standard, or best-effort service classes.

It employs quality-of-service (QoS) features such as application-aware networking with IP QoS features and trafﬁc

management with ATM QoS features. This enables the router to expedite the handling of mission-critical or delay

sensitive applications, such as enterprise resource planning (ERP) or videoconferencing while sharing network

resources with lower-priority applications such as Web surﬁng.

Application-Aware Networking with IP QoS

Usinglowlatency queuing (often calledLLQorPriority Queuing Class-Based WeightedFair Queuing[PQCBWFQ]),

the Cisco 827-4V router enables service providers and resellers to guarantee or differentiate bandwidth based on a

speciﬁc application or a speciﬁc user. For example, the order entry department trafﬁc can be given priority over the

marketing department trafﬁc. The ability of the Cisco 827-4V router to restrict the bandwidth of certain applications

or users allows service providers and resellers to manage trafﬁc on the basis of application or user requirements.

Resource Reservation Protocol (RSVP)provides QoS admission control,resource reservation requests, and feedback

to allow end-to-end bandwidth reservation and management.

Trafﬁc Management Using ATM QoS

In addition to IP QoS features, the Cisco 827-4V router provides ATM QoS features that enable service providers to

manage their core ATM network infrastructures to deliver scalable, cost-effective services with QoS guarantees to

their customers. Per-virtual-circuit trafﬁc shaping and queuing allow further optimization of the existing bandwidth

between customers and various services.

H.323 VoIP Sample Infrastructure

Branch Office

Voice Gateway

Cisco 1750, 2600, 3600

Corporate Gateway

to PBX

Cisco 3600

Small Office

Voice Gateway

Cisco 827-4V

DSLAM

IP/ATM Network

PSTN

H.323 RAS

Gatekeeper

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Cisco CISCO827-4V-RF Datasheet Page 4