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Megalink Service

Megalink service is commonly used by businesses with digital Public Branch Exchanges (PBXs) that would benefit from a fully digital access path into the digital and public telephone networks. Businesses with large voice systems use Megalink service to make their systems more efficient and to make them capable of offering applications besides voice.

Overview

Megalink™ service is Bell MTS's name for the ISDN technology known as Primary Rate Interface (PRI). This service provides digital access to Bell MTS's Public Switched Telephone Network (PSTN) and to the Digital Switched Network (DSN).

Megalink service is commonly used by businesses with digital Public Branch Exchanges (PBXs, a component of Unified Communications) that would benefit from a fully digital access path into the digital and public telephone networks. Businesses with large voice systems use Megalink service to make their systems more efficient and to make them capable of offering applications besides voice.

For example, Megalink service allows a business to combine small, dedicated-use trunk groups into one larger and more efficient trunk group. This feature makes network access more efficient and reduces the number of required PBX trunks by 10 to 15 per cent.

Benefits

Replacing analogue trunks with Megalink service provides many other benefits. These include:

  • dynamic channel assignment, which manages call traffic, efficiently assigning channels to handle incoming and outgoing calls
  • integrated voice and data
  • Calling Line Identification Delivery (CLID)
  • instantaneous call setup
  • backup D Channel, so that if one D channel fails, another Megalink service D channel will take control of messaging for it.

With the proper equipment, Megalink service can also provide businesses with bandwidth-on-demand capability. This allows customers to use applications requiring higher bandwidths, but to pay for them only when they're actually used.

For example, if a video conference transmission speed of 384 kbps is required, six B channel connections are established. If lower quality conferencing is adequate, fewer B channels are used.

Applications

Some of the data applications Megalink service supports include:

  • LAN bridging
  • High-speed file transfer
  • Group video conferencing
  • Digital facsimile

Some of the voice applications Megalink service supports include:

  • Calling Line Identification Delivery for security
  • Calling Line Identification Delivery for enhanced customer service
  • Efficient PBX Trunking

ISDN Technology

ISDN is the globally recognized name for a technology that provides digital access to digital communications networks.

While Bell MTS's network and switching offices are totally digital, the access lines that link individual businesses and residences to this network are often analogue connections. That means when you initiate a phone, fax, or computer transmission, it is carried in analogue form along an access line to a switching office. There, it is converted to digital form.

With ISDN, the user's access line - that portion between the desktop and the first switching office - is fully digital. In other words, ISDN provides the final digital link in an end-to-end digital path.

This fully digital path allows for transmission of greater speed, capacity, and efficiency than analogue connections can handle. It also allows for a much wider range of applications.

Digital communications networks have been available in Canada for many years and can be accessed through a number of services, including Centrex Data. These services can be used if ISDN is not yet available in your area.

However, ISDN is unique because it supports both data and voice communications, simultaneously if you choose. ISDN links you to the regular telephone network, called the Public Switched Telephone Network (PSTN), for voice communications. It can also be used to transmit data communications on the Digital Switched Network (DSN).

The DSN is, in fact, very similar to the PSTN and operates parallel to it. However, while the PSTN supports analogue voice communications and limited data communications, the DSN supports very high-speed data communications and guarantees an end-to-end digital connection.

ISDN calls are placed just like normal phone calls and are billed the same way as regular local and long-distance voice calls. Bell MTS's long-distance savings plans also apply.

 
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