PBX Networking to New Voice Networking
The next slides graphically illustrate the migration from traditional circuit-switched voice networking to the new packet-switched integrated data/voice/video networking. Here you see two offices… one in Vancouver and
Computer Network Tutorial
Voice – Capable Route
A voice-capable router can replace a Private Line, Automatic Ringdown (PLAR) service from a telephone service provider. In the example, a user takes the phone off-hook, causing another
Computer Network Tutorial
Applications of Integrated Voice and Data Networks
Integrated voice and data networks support a variety of applications, all of which are designed to replace leased lines and lower costs. Each of the applications listed above
Computer Network Tutorial
Voice over Asynchronous Transfer Mode (ATM)
Asynchronous Transfer Mode (ATM) is a technology that can transmit voice, video, data, and graphics across LANs, metropolitan-area networks (MANs), and WANs. ATM is an international standard defined
Computer Network Tutorial
Voice over Frame Relay
Voice over Frame Relay (VoFR) technology consolidates voice and voice-band data (including fax and analog modems) with data services over a Frame Relay network. The VoFR standard is
Computer Network Tutorial
VoIP – H.323 Interoperability
VoIP works with a company’s existing telephony architecture, including its private branch exchanges (PBXs) and analog phones. VoIP and H.323 enables companies to complete office-to-office telephone and fax
Computer Network Tutorial
Voice over IP Components
The Voice over IP standard incorporates other components, including:   – G. standards, which specify analog-to-digital conversion and compression (as described earlier in this chapter).   – H.323 standard, which specifies call
Computer Network Tutorial
Voice over Data Transports
We’ve covered the building blocks for voice/data integration. Now, let’s take a look at the different transports customers can consider. The most widely used is Voice over IP.
Computer Network Tutorial
QoS in Voice Technology
The advantages of reduced cost and bandwidth savings of carrying voice over packet networks are associated with some quality of service issues that are unique to packet networks.
Computer Network Tutorial
Voice Technologies Compression
What makes voice compression possible is the power of Digital Signal Processors. DSPs have continued to increase in performance and decrease in price over time, and as they
Computer Network Tutorial