1-2 CHAPTER 1: GETTING STARTED
The most modern and efficient of these WAN services includes ISDN (Integrated Services Digital Network). This provides a high speed dialup facility to allow your AccessBuilder 500 to automatically and quickly dial remote offices, transmit your data between remote PCs just as speedily and then disconnect the call. You incur minimum ISDN telephone charges as calls are made only when needed. This is known as Dial on Demand.
ISDN can also be used to make voice calls using the AccessBuilder 500’s Voice port. You can connect an ordinary telephone handset, faxes and other similar office equipment.
The AccessBuilder 500 also has al port for connection over a permanent leased line WAN connection, also available from your telephone carrier organization. Leased lines are available to work at a range of speeds which incur higher costs the higher the line speed. The benefit of leased lines is their permanence and fixed cost. No dialling is required but unlike ISDN you pay a fixed cost regardless of whether you transfer little data or high volumes of data 24 hours a day.
Overall ISDN is probably the most cost effective solution for small businesses. However, if your requirements to move data between sites is likely to increase, the flexibility offered by the AccessBuilder 500 fitted with both ISDN and WAN ports allows you to choose the type of connection between sites that best meets your needs.
Typically, the AccessBuilder 500 is used to interconnect LANs running protocols such as Transmission Control Protocol/Internet Protocol (TCP/IP) or Novell Internetwork Packet Exchange (IPX). Offering full
In the USA, some ISDN services run over 56 Kbps channels. Basic Rate ISDN therefore offers connectivity of 112 Kbps in total.
