Settings description of PBX and IP PBX

It is increasingly more common for organizations to acquire, install and maintain hardware components, such as the central switch (PBX) or IP PBX, which are required to admit their own telephone systems. Many organizations purchase their own telephone equipment and train its staff to reduce costs associated with maintenance of its telephone systems and because they want greater control of telephony features offered.

For an organization to possess and maintain a telephone network, you must purchase the hardware needed. It should also take into account the daily maintenance of telephone equipment and training necessary for your staff to manage the telephony system. This topic discusses the different types of telephone systems and business or organizational components of telephony hardware required. It also provides examples of different types of telephony configurations.

A PBX is a legacy PBX telephony device that switches calls in a telephone network or circuit switched. A legacy PBX is a PBX that does not have a network adapter and can not transmit packets. Not being able to transmit IP packets, some companies and organizations have replaced legacy PBX to IP PBX. For a list of supported PBX for Exchange 2007 Unified Messaging, see Telephony Advisor for Exchange Server 2007.

Most companies use medium and large PBX. PBX enables users or subscribers to share a number of external lines for making telephone calls are considered as external to the PBX. A PBX is a much less expensive to provide each user with a telephone company outsourcing. A PBX can be connected telephones, fax machines, modems and other communication devices.
Typically, the PBX equipment is installed in the organization itself and connects calls between phones in the organization and the telephone company. Normally, there are a limited number of external lines, called trunk lines, to make and receive calls outside the company from an external source such as the PSTN.

To enable a legacy PBX for use with Exchange 2007 Unified Messaging, you must implement a gateway IP compatible. For a list of IP gateways, see Telephony Advisor for Exchange Server 2007.

IP PBX An IP PBX is a PBX that has a network adapter compatible with the IP protocol. It is a piece of telephone switching equipment that normally resides in an organization or company rather than being located in the offices of a telephone company. There are two types of IP PBX: IP PBX and IP PBX traditional hybrid. Both traditional and IP PBX, IP PBX hybrid are consistent with the IP protocol for sending voice conversations in packets based VoIP phones. However, hybrid IP PBX also connects traditional analog and digital phones.

IP PBXs are frequently easier to manage than the legacy PBXs, because administrators can easily configure the IP PBX through an Internet browser or another IP-based tool. Furthermore, it is not necessary to install cables, wiring, patch panels or additional. With an IP PBX, to move an IP phone based simply unplug it and plug it back elsewhere. This avoids the costly services needed to move a phone from a legacy PBX provider. Likewise, organizations that own an IP PBX do not have to bear the additional costs of infrastructure needed to maintain and manage two separate networks for circuit switched and packet switched. For a list of supported IP PBX for Exchange 2007 Unified Messaging, see Telephony Advisor for Exchange Server 2007.

IP PBX Configurations

An IP PBX is a PBX that supports IP phones to connect through an Ethernet LAN or packet switching. Send IM conversations into data packets or IP. An IP PBX can have multiple interfaces. These include interfaces to a data network and other interfaces that allow connection to a telephone network or circuit switched.

The development of Internet protocols in real time has been correctly can send voice messages and faxes by a data network. Among these protocols of the Internet in real time including VoIP protocols that are used with Exchange 2007 Unified Messaging: Session Initiation Protocol (SIP) over Transmission Control Protocol (TCP) for voice and T.38 messages to faxes. These protocols have been successfully able to send voice messages and faxes by a data network. VoIP protocols in real time are necessary to maintain order and control the delivery and synchronization of data packets to send voice messages through a data network or circuit switched. Failure to use these protocols to maintain and control the delivery order and synchronization of data packets, the voice of the people would decompose and the sound would be inconsistent or images could be confusing. For more information about the VoIP protocols that are used in Exchange 2007 Unified Messaging, consulteDescripción protocols, ports, and unified messaging services. For a list of authorized IP PBX in the Exchange 2007 Unified Messaging, see Telephony Advisor for Exchange Server 2007.