Chapter 1: Introduction

The Cisco Wholesale Voice Solution Design and Implementation Guide will help you establish the services introduced in the Cisco Wholesale Voice Solution Overview. Links to that and other solution-related documentation are available at the following URL:

The Cisco Wholesale Voice Solution Overview discusses many factors that must be taken into account in designing a wholesale voice network. It is expected that you are familiar with that document, and specifically with the interconnect issues, architectural components, and design templates related to the solution.

Establishing Required Components

If the hardware and software for your chosen service are not yet established, begin by referring to the following chapters:

Each of these provisioning areas is also discussed in Chapter 2, "Solution Architecture," of the Cisco Wholesale Voice Solution Overview.

Establishing Desired Services

To summarize, the services offered by the Cisco Wholesale Voice Solution are as follows:

The Cisco Wholesale Voice Solution Overview provides templates that cover five interconnect scenarios applicable to these services:

Table 1-1 Templates and Their Descriptions

Template	Description
A1 and B1	TDM-to-TDM Call Topology
A2 and B2	TDM-to-IP Call Topology Using DGK-Based IP Interconnect
A3 and B3	TDM-to-IP-Based Interconnect with OSP
A4 and B4	IP-to-IP-Based Interconnect (Transit Network) with DGK
A5 and B5	IP-to-IP-Based Interconnect (Transit Network) with OSP

The templates discuss design issues or considerations with respect to the following categories: dial plan, billing/settlement, security, and prompting. Both Service A and Service B share the first three categories. However, card services are unique in that they require prompting to interact with the customer. Table 1-2 shows where in this document the above four categories are discussed with respect to provisioning.

Table 1-2 Dial Plan, Billing/Settlement, Security, and Prompting Discussions

Topic	Location
Dial Plan	Dial Plans and Number Normalization
Billing/Settlement	"Provisioning Shared Support Services"
Security	Providing Security
Prompting	Provisioning Services to Support IVR

In addition, the Cisco Wholesale Voice Solution Overview provides templates related to dial plan, billing/settlement, and security for the following service options:

The implementation of the above options is also discussed later in this design and implementation guide.

Network Diagrams

To assist you in provisioning through an understanding of end-to-end topologies, or provisioning spaces, this section presents a variety of high-level network views that cover the following scenarios:

The key sectors of these models will be referred to as various provisioning modules are addressed, with attention to the command-line specifics appropriate to each provisioning sector.

Basic Aggregation Model

Figure 1-1 illustrates the scope of provisioning space for a basic aggregation model that does not use OSP (Open Settlements Protocol) resources. In addition to GKs and DGKs, note especially the following optional components:

Aggregation Model with Card Services (Prepaid and Postpaid)

Figure 1-2 (a simplified version of the previous two network diagrams) illustrates the scope of provisioning space for an aggregation model that provides both prepaid and postpaid card services. Of concern here are the following:

A TFTP server, which hosts audio prompt files in addition to storing Cisco IOS image and configuration files
An AAA/RADIUS billing application server (here called US-RADIUS) in the US zone, which provides the accounting function

Table of Contents

Introduction

Establishing Required Components

Establishing Desired Services

Network Diagrams

Basic Aggregation Model

Aggregation Model with Card Services (Prepaid and Postpaid)