Cisco WS-X4604-GWY - VoIP Gateway Especificaciones descargar pdf (Pagina 41)

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Cisco IP Telephony Network Design Guide

78-11103-03

Chapter 2 Campus Infrastructure Considerations

High Availability

Note The three-port switch has two external ports and one internal port.

Figure 2-3 shows the two basic parts of the IP phone—phone circuitry and

switching electronics—housed in the same package. There are two switched

connections available as RJ-45 jacks: one goes to the switch in the wiring closet

using a straight-through cable, and the other connects a PC or workstation. Two

additional non-Ethernet connectors can be used for attaching a headset and for

debugging purposes.

Figure 2-3 Cisco IP Phone Internals

High Availability

The distributed architecture of a Cisco IP telephony solution provides the inherent

availability that is a prerequisite for voice networking. Cisco IP telephony

solutions are also inherently scalable, allowing seamless provisioning of

additional capacity for infrastructure, services, and applications.

In the world of converged networking, in contrast to the world of the PBX,

availability is designed into a distributed system rather than into a box.

Redundancy is available in the individual hardware components for services such

PC/workstation

Data

Voice

IP phone

Catalyst

switch

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Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 41