Cisco VG200 Uso manual - Página 3

Navegue en línea o descargue pdf Uso manual para Pasarela Cisco VG200. Cisco VG200 14 páginas. Voice gateway
También para Cisco VG200: Manual (10 páginas)

Imprimir página
Cisco VG200 Uso manual
Chapter 1
Using the Cisco Voice Gateway 200
Voice over IP Overview
Figure 1-1
Typical VoIP Network
POTS phones
Gateway
PSTN
TCP/IP network
IP phones
Soft phones
In a VoIP network, illustrated in Figure 1-1, it is possible for IP telephony devices
to interoperate directly. However, to connect to the PSTN, an intermediary device,
called a gateway, is required. A VoIP gateway, such as the Cisco VG200, allows
users of IP phones and PC-based soft phones to exchange calls with users of plain
old telephone service (POTS) phones on the PSTN. The gateway translates
between the signals used on the PSTN and the IP packets used to transmit data on
a TCP/IP network.
The H.323 Standard
The H.323 standard describes a method for converting between voice and data
transmission formats and for managing connections between telephony
endpoints. H.323 is actually a collection of protocols that define standard methods
for interconnecting H.323 endpoints (sometimes called terminals) and POTS
devices.
Software Configuration Guide for the Cisco VG200
1-3
78-10322-02