Basic ISDN

ISDN [Integrated Services Digital Network] is a digital switched service capable of transmitting voice, video and data between locations.

An ISDN line connects to both the standard telephone network as well as supporting high-quality, fast and reliable digital transmission.

One ISDN line can manage a business' phone, fax, Internet and data transmission needs.

Basic ISDN

Basic ISDN refers to two 64 kbit/s channels over a normal telephone line, which can be used to transmit voice, image, video or data calls.

D Channel

A signalling channel, called the "D" channel, controls the set up and operation of the two faster communication

B Channel

"B" channel enables two simultaneous independent calls over the two "B" channels.

In most cases your existing telephone line can be converted to ISDN. With additional equipment, these two channels can be combined for higher transmission speeds.

Basic ISDN Equipment Support

A basic ISDN set up allows connection of up to eight pieces of equipment [ faxes, printers, telephones or computers] on a single connection [with some additional S-Bus cabling].

In most services, one directory number comes as standard, and a total of eight directory numbers may be assigned using the Multiple Subscriber Number service. This means callers can dial up eight different devices via the two 64 kbit/s channels.

Calls can be made and received from the public telephone network as well as ISDN subscribers.

Telecom connects the necessary equipment at our exchange and a Network Terminator (NT) at your premises. This includes an RJ45 telephone socket so you can connect your ISDN compatible equipment.

For equipment that is not ISDN compatible, a terminal adapter (TA) can be used to convert the ISDN signal for recognition by your equipment.

Typcial Uses

Typical uses of basic ISDN include:

• High speed Internet access
• Replace a modem solution with a faster, more reliable service
• Remote dial-up access to your LAN
• Connection of a small/medium size digital PABX to the telephone network
• Integrate low volumes of voice, data or video communications over a single access line
• Transmit high resolution graphics or large files at high speeds to one or various destinations on an intermittent basis
• Leased circuit backup, or bandwidth on demand for overload
  

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