Deploying Cisco® Voice over IP Solutions

234 Chapter 6: Designing a Long-Distance VoIP Network

Figure 6-1 Long-distance VoIP interconnection possibilities.

The long-distance VoIP network solution provides the following benefits:

• Voice quality that is indistinguishable from that of the PSTN

• A cost-effective, reliable VoIP network infrastructure

• Support for least-cost routing and other enhanced call-routing methods

• Intercarrier call authorization and accounting (peer-to-peer)

• Support for intercarrier clearing and settlement services

• Support for local, national, and international dial plans

• Connectivity with the PSTN over carrier interfaces

• Connectivity with other VoIP service providers and VoIP equipment from other

vendors

• A worldwide network of other VoIP service providers interested in interconnecting

Long-Distance VoIP Design Methodology

To design your own personalized long-distance VoIP solution, we recommend that you

systematically perform the following steps:

Step 1 Identify the service or services you plan to sell.

Step 2 Determine the type of carriers or providers you plan to interconnect with.

Step 3 Determine the interconnection types you plan to use.

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Origination Termination

ITSP/ASP

IXC/PSTN

IXC/PSTN

ITSP/ASP

IPTDM

TDM

GK

GK

GK

IP

Wholesale VoIP provider

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