VOICE OVER INTERNET PROTOCOL (VoIP) FUNDAMENTALS BCOC D10

What is IP Enabled Private Branch Exchange?

A circuit switch that is capable of supporting both POTS and IP loops and trunks is used in conjunction with a packet switched data network.

Define Voice over Internet Protocol (VoIP)

A technology which allows Internet Protocol-based networks to be utilized for real- time voice applications.

Identify the benefits of Voice over Internet Protocol (VOIP)

Cost Savings, Bandwidth, Rich Applications and Features

What is IP Telephony?

No circuit switchboard (PBX/HDX/IGX/SLICE) is used and all calls are processed via IP from start to finish by means of a software switch or "soft" switch. This is a closed system, more similar to an intercom system, where calls to the Defense Switched Network (DSN) or Public Switched Telephone Network (PSTN) cannot be made, as there is no gateway device.

What is IP Trunking?

Refers to the transport of inter-switch connections (trunks) via an IP transport system (Ethernet or serial). This requires the conversion of T-1 format into a packet switched format through the use of a gateway device. To achieve this, a T1 line can be connected from a switchboard directly into a router's Voice Wide Area Network Interface Card (VWIC) port (sometimes referred to as a T1 Controller port).

What is centralized Call Processing

a Cisco Call Manager is established at one central location. This method is used most often on SIPRnet due to its centralized control and increased security.

What is distributed call processing

a Cisco Call Manager or Voice-enabled router running Cisco Call Manager Express is established at each separate site.

Identify the two types of call processing used within a Voice over Internet Protocol (VoIP) network

centralized and distributed.

Identify the four basic components of a Voice over Internet Protocol (VoIP) network

- The IP network (Infrastructure)/ The Packet Switching Network: A Digital Signal Processor (DSP) segments the voice signal into frames, which are then coupled in groups of two and stored in voice packets. - Call processor/controllers: - Media/signaling gateways: Gateways provide translation between VoIP and non-VoIP networks through converting protocols. This could potentially allow a VoIP network to interface with a network such as the Public Switched Telephone Network (PSTN). - Subscriber terminals/Endpoints: Subscriber terminals refer to the devices that the user will utilize to interface with the VoIP network. Within Marine Corps VoIP networks, two types of subscriber terminal are typically utilized; IP telephones and "Soft phones".