Voip

You are here:

Home
Voice
Voip

An IP-PBX is a PBX equipment, or telephone switchboard, that is designed to provide video and/or voice communication services over IP data networks. That is, using IP Telephony technology, telephone service can be provided for example over a company’s IP virtual private network. When the IP network used is the Internet, we also talk about “Internet Telephony”, which is a particular case of Voice over IP (VoIP) services. There are significant differences in operating guarantees and voice quality between the two cases.

Today, the vast majority of telephone switchboards that are installed are IP-PBX.

Advantages of IP telephony

Simplification and Optimization of IT Infrastructure. IP Telephony uses the same type of equipment as computing (servers, cabling, even PCs can be used as terminals).
To. There is no need to invest in building double wiring as you can share the same network for computers and telephone terminals.
B. lower operating and management costs. Maintenance can be performed remotely and extensions can be relocated simply by changing the network point terminals.
Unification of Corporate Telephony in multi-host environments.
To. Free calls between locations.
B. Integrated numbering plan.
C. Centralization of public network access lines (RTPs) at one or more points, providing line savings in small locations.
D. Rationalization of the operator’s position, centralizing it – which saves staff – or decentralizing it when appropriate: incoming calls can be diverted to the center that allows the most appropriate attention depending on availability and workload.

Better quality in telephone communication since the entire spectrum of human voice (80 Hz to 14 KHz) is better used instead of using only a narrow band (300 Hz to 3 Khz) that are transmitted on traditional TDM telephony.
New features more integrated into the business. There are usually two large applications:
To. In the improvement to customer service. For example, performing actions automatically by marking certain codes.
B. In improving employee productivity in many ways. For example, showing the status of communication (available, gathered, traveling, etc.) avoiding unnecessary communications or allowing to choose more appropriate means of communication (email, chat, etc.) Or also, identifying the user in the same way even if they are traveling or in another office other than the usual.

Architecture or Elements of IP Telephony

IP terminals: are the substitutes for current traditional phones. They can be deployed on both software – on the PC, or on tablets – and on hardware.
IP-PBX: This is the central element of VoIP. It consists of software (owner or not) hosted on a classic server that will provide control and routing of calls. They are the substitute for the current pbxes (PBXs).
IP Gateways: This is the link to the traditional telephone network, acting transparently to the user.
SIP: Session Initiation Protocol (SIP) has become the standard between signaling protocols for VoIP, surpassing even H323. Provides logging, localization, routing services.
Codecs: These are the encoding and decoding and compression algorithms of the audio or video to be transmitted. Depending on the codec used, more or less bandwidth will be used, this parameter being directly proportional to the quality of the transmitted data. The most popular are the G.711 and G.729 in their different versions.
Data Networks : Bothinternal office (LAN) and external (WAN). Stable, guaranteed, constant and not too high bandwidths are critical, and if shared with other data, as is usually the case, voice packets are required to be prioritized using “Quality of Service” (QoS) techniques.