AT&T OneVision DEFINITY G3 Guide, Инструкция по установке и подключению, Страница: 86 / 287

5-8 Issue 2 April 1996
Planning Connectivity
To Choose the Hardware
To Choose the Hardware
Introduction Before you choose your data communication hardware, consider
these site-specific issues:
■
Whether or not you want to make connections through the
public network
■
Distance requirements
■
Cost factors
Type of
hardware The following table lists the types of data communications
hardware that you need for connecting to a network. It also lists
distance and equipment requirements.
Network Hardware
Distance
from PBX Hardware
requirements
Public Any
supported
modem unlimited Modem pooling on
the DEFINITY G3
PBX
Private 7400B data
module Within
5000 feet A port on a digital
board (TN754 in the
U.S.A.)
ADU Within
2000 feet A port on a dataline
board (TN726E in
the U.S.A.)
(An ADU is less
expensive than the
7400 B data
module.)