Specifications

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ShoreTel Architecture TAPI and ShoreTAPI

ShoreTel 14 Maintenance Guide 24

Figure 5 on page 24 shows how the ShoreTel system uses NCC and RPC to pass TAPI or ShoreTAPI

information in the system.

Figure 5: NCC and RPC Communications in a ShoreTel System

For example, when a user dials a number, the ShoreTel voice switch notifies TMS. TMS then presents

that call information to the application via TAPI or ShoreTAPI.

A service called the Distributed Telephony Application Service (DTAS) provides connectivity between

applications and TMS instances. DTAS reads the system configuration so that it knows which

extensions are controlled by which TMS instances. DTAS is responsible for routing call control and

events between applications and the TMS instance responsible for a given extension. For extensions

controlled by the local TMS instance, DTAS routes call control to the local TMS instance. For

extensions controlled by a remote TMS instance, DTAS routes call control to the appropriate remote

TMS instance.

= RPC

= Network Call Control

Legend

Headquarters Site

Regional Site

Small Office / Home Office

Teleworkers

ShoreTel Service

Appliances

ShoreTel Voice Switch

Soft

Phone

IP Phone

Analog Phone

IP Phone

Soft

Phone

IP Phone

Analog PhoneAnalog Phone

ShoreTel

Director

Desktop/

Browser

Clients

Desktop/

Browser

Clients

Desktop/

Browser

Clients

Desktop/

Browser

Clients

Desktop/

Browser

Clients

DRS

CAS/IPDS

Voicemail

Media Driver System

Softswitch

TMS/DTAS

Remote Server

DRS

CAS/IPDS

Voicemail

Media Driver System

Softswitch

TMS/DTAS

Remote Server

Media Driver System

Voicemail

Distributed Routing

Service (DRS)

Client Application Server

(CAS)/IPDS

Internet Information Server

(IIS)

Softswitch

Monitoring Service

CDR

Database

Monitoring

Database

Configuration

Database

Data Services

Telephony Management

Service (TMS)/Distributed

Telephony Application

Service (DTAS)

HQ Server