ISDN NT Plus

The NTPlus allows existing telephones and FAX machines to be directly connected to an ISDN line in addition to other ISDN devices such as computers.

The NTPlus integrates the functions of a Terminal Adapter (TA) and a Network Termination 1 (NT-1) device into a single compact unit. This stand-alone device supports ISDN capability by utilising ISDN hardware and/or standard analogue devices. Telephones, answering machines, FAXs, and modems may all be attached to the TEL1 and TEL2 analogue ports, and up to seven additional ISDN devices may be connected to the ISDN "S/T" port.

Multiple Subscriber Numbers (MSN)

MSNs allow callers to ring directly to each TEL outlet, and calls to be made from each TEL outlet on the NTPlus in the same way as if they were separate telephone lines.

One exchange number is allocated with each ISDN Basic Rate Access (BRA) connection. Up to seven additional exchange numbers may be allocated on a subscription basis. This enables up to eight devices to have shared access to the two BRA B-channels. A typical application for MSN use would be to connect a telehone to TEL1, and a FAX to TEL2. Each port would have a unique MSN exchange number.

Each analogue port will be able to have an individual number assigned to it. If the user has registered a unique MSN number to the TEL1/TEL2 port, the TEL1/TEL2 port will ring for the specific incoming MSN number only. If no MSN has been assigned to the TEL1/TEL2 port, the port will ring for all incoming voice calls. Ring cadences will be determined by the telephone exchange, and locally reproduced by NTPlus.

User to User Signalling

User to User Signaling enables information transfer between calling and called ISDN numbers during call set-up and clearing only (UUS 1) with up to 128 octets of data for each message.

Sub Addressing

Sub Addressing can also be used to allocate additional numbers at the end of the directory number to discriminate which terminal the call is destined for. This is similar to MSNs but is only available where both the calling and called party have ISDN connections.

Indicator Lights

The NTPlus has five active LEDs (Light Emitting Diodes) which indicate the operating states of the NTPlus. The following table describes the function of each indicator light:

Key Benefits of ISDN

Usage based charging

Like the public telephone network you only pay for the time you use, and a monthly access charge.

Switched Service Flexibility

ISDN is an evolution of the public telephone network - it is a switched service. You can call anyone who has ISDN access in New Zealand, and an increasing range of destinations overseas. You can also make standard voice calls on the public telephone network, or data calls to people who use modems.

High speed, high quality digital transmission

ISDN calls are digital from end to end, so you get higher speeds, quality and reliability of transmission and faster call set-up than on the public telephone network.

Simultaneous voice, data, image and video

A single access line can carry voice, image, data and video applications.

High speed file transfer

Quickly send large text files, such as legal documents, and high resolution reproductions of images to a variety of destinations.

Remote site communications

Staff working from home or small, remote site can dial up a central site LAN and share information using file transfer, e-mail or videoconference.

High quality video

Perfect for videoconferencing with both the flexibility of a witched service and the high transmission speeds required for video.

Business Uses

LAN Interconnect (WAN)

Joins Local Area Networks on a dial-up basis. This is useful where there are low traffic volumes required between the two LANs for applications such as e-mail, remote printer access, or small file transfer on an intermittent basis.

Remote Access

With Telecom Work Link, staff working remotely can connect to your central office LAN or access the Internet via a high speed, high performance ISDN link, allowing them to function just as if they were at work.

File Transfer

With ISDN file transfer you can quickly and accurately send and receive all types of large computer files such as high resolution graphic images, presentation slides, legal documents or x-rays.

Using Telecom's Digital exPress, you can send visuals, photos, layouts and galley proofs from your computer to customers and printers across town or around the world. You can also access image databases, browse through digitally stored photographs or graphics, and download your selection as required.

Interactive Editing

One or more users can dial up a remote PC to view and alter on-screen images, such as in an educational interactive multi-media session. Students can participate using electronic whiteboards and audio or video equipment.

Internet Access

ISDN's fast connection time provides easy access to the Internet. The high speed capability of ISDN increases the cost effectiveness of downloading files.

VideoConferencing

Meetings via VideoConference eliminate much of the expense and travel involved with conventional meetings. Fully interactive audio and video makes it almost like being there.

ISDN Leased Line Backup

If a dedicated data circuit is mission critical to your business, ISDN can be used as a cost-effective standby in the event of a communications failure in your primary link(s).

Bandwidth on Demand

If your peak traffic requirements cause congestion on your primary link(s) at certain time during the day, ISDN can be used to carry the excess capacity, therefore providing extra bandwidth on demand.

Security Monitoring

ISDN makes surveillance of remote sites possible, including enhancements such as remote scan and zoom. The live ISDN video link can be initiated via motion detection.

High Quality Audio

You can achieve much higher audio quality using ISDN with special communications software - so much so that ISDN is the preferred service for broadcasting purposes.

Group 4 Facsimile

G4 faxes, the fastest and best quality faxes of today, require ISDN. They can provide very high quality reproduction and consistently faster transmission than traditional faxes.

Bandwidth On Demand Data Networks

Large bandwidths can be dialled on demand with Primary Rate ISDN, providing a highly flexible data network. This means you can increase or decrease data transfer capacity to multiple sites as and when required - and charges are based on the duration of your calls.

Wide Area Networking (WAN)

ISDN Primary Rate can act as a concentration point to allow centralised access to your corporate LAN. To access the central LAN, users from regional offices or retail outlets would use Basic Rate ISDN, which would provide them with high speed access to all the facilities of the Head Office LAN, eg file transfer, databases, printers, email.

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