Toshiba Voice IP Application Bulleti

Strata® DK

Application Bulletin

ABDK-0004 April, 1999

The voice IP telephony gateway enables user interaction via the Public Switched Telephone Network (PSTN) and public/private IP networks. It enables voice communication between users of telephones and/or multimedia enabled PCs. Other applications, such as Internet Telephone Service and Fax Over IP, are also p ossibl e. For a full descr ipti on of t he produ ct and applic ation s of the voice IP telephony gateway, please contact VocalTec® Communications Ltd., or refer to their Web site at http://www.vocaltec.com/.

This bulletin describes the voice IP telephony gateway applications for enterprise solutions using the Toshiba Strata DK424 Digital Business Telephone Systems. Specifically:

♦ T oll Bypas s – Voice traf fic from a local St rata DK424, norma lly routed through the PSTN (tol l

♦ Surf & Call™ – This emerging application brings Web surfers into the Call Center instantly

♦ Surf & Call with ACD Agent Screen Pop – This is an enhanced feature of the basic Surf &

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Voice IP Applications for Strata DK

segment), is instead carried via public/private IP network in the form of IP packets to remote Strata DK424 users with a similar voice IP telephony gateway and Strata DK424 configurations. The main benefit is the elimination of the long distance toll charge.

without a separat e tel ephone cal l or call back s equence . I t assu mes t hat t he Web surfer is us ing a multi-media enabled PC. In addition to Call Center access, a company could publish Directory Service or Yellow Pages on its Web site, offering CALL buttons to Web surfers.

Call applica tion. Similar to Caller ID and IV R processes, Web surfer ID and Interactive Web Response processes are provided. As a result, a pop-up window showing the ID of the Web surfer is presented to the ACD Agent at the same time the voice call is delivered.

The Calling Process

Calling via the voi ce IP gateway is a simple pro cedure. For voice call s, the gateway is dialed from any telephone or PC and the destination number is entered. The gateway then compresses segments the call into packe ts which trave l over the publi c/privat e IP network to a second gateway where they are decompresse d and reconstructed. The cal l i s th en ro ute d over the local PSTN/PBX to the destination telephone.

For Surf & Call the calling process is automated via a Surf & Call enabled Web site on behalf of the surfer calling a pre-defined gateway.

The required bandwidth varies, depending on the types of voice encoder being used. The voice IP telephony gateway expects a stable bandwidth of 28KBPS for the first two voice connections and 11KBPS for each additional voice connection.

Toshiba America Information Systems, Inc.

9740 Irvine Blv d., Ir vine , CA 92618-1697 (949) 583 -37 00

Telecommunication Systems Division

http://telecom.toshiba.com

and

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Toll Bypass Configuration

The Need for Good Network Planning

To successfully put voice traffic onto a public/private IP network requires a careful plan that involves both the telecom and the datacom side of the enterprise. Network planning requirements vary depending on the in-house expertise and the complexity of the network configuration.

Toll Bypass Configuration

A typical Toll Bypass system configuration is shown below:

Branch VTG-LA 213-555-3XXX

PSTN

ABDK-0004

Remote Access via Pay Telephone

Head Office

VTG-NY

212-555-2XXX

Extension 200

Voice

Extension 212 Voice Mail

Data

Remote Access

Applications

Five simple applications are described on the following pages.

Phone to Phone

DK40

LAN LAN

via WWW

VTG-LA PBX code = 3

POTS

Private or Public

IP Network

VTG-NY PBX code = 2

DK424

Voice

Data

nary and Confidential

4138

The call first travels over the PSTN/PBX to the nearest Strata DK424 and gateway. When prompted, the caller enters the dest ination tele phone number . The call then tr avels over the I nternet to the nearest Strata DK424 and gateway to the specified telephone. The local Strata DK424 and gateway decides the best routi ng to the destinati on on the basis of cost, load, and qual ity of service. From the remote Strata DK424 and gateway, the call is again sent over the PSTN/PBX to t he destination phone. The figure below depicts the Phone to Phone application.

Prel

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PSTN PSTN

Gateway Gateway

Internet/

Intranet

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Voice IP Applications for Strata DK

ABDK-0004

Fax to Fax

Using the Strata DK424 and gateway real-time fax capabilities, fax transmissions are made between local and remote gateways. The local fax dials the remote fax over the gateway network, establishes the connection, and transmits to the remote fax (see figure below).

Applications

Fax Fax

Phone to PC

When calling Internet telephones from a regular telephone, the call travels over the PSTN/PBX to the nearest Strata DK424 and gateway. When prompted, the caller enters the destination Internet address using the telephone’s keypad. The call then travels directly to the desired computer. See figure below.

PC to Phone

When placing a call from Internet telephon e, the call trav els over the Internet/Intranet to the gateway closest to the call destination. This routing is automatically determined by the system. From this point, the call travels over the PSTN/PBX to its final destination. See figure below.

PSTN PSTN

Gateway Gateway

PSTN

Gateway

Internet/

Intranet

4142

Internet/

Intranet

4140

Internet/

Intranet

4141

PSTN

Vocaltec

Telephony

Gateway

Web Browser to Phone: Surf & Call

Using the Surf & Call function, user’s surfing the Web can connect to a company’s call center

simply by clicking a Call button located on the company Web page (see figure below). After downloading the plug-in, users can communicate with a customer service group, ordering department, or help desk by using their Web browser and multimedia equipment. This feature leverages the strengths of a company’s Web site and call center, expanding the number of ways in which customers can obtain information and conduct business.

Internet/

Intranet

Prel

Voice IP Applications for Strata DK

nary and Confidential

4143

Gateway

Call Center

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