Appendix E - Ricoh fax4700l Operator's Manual

APPENDIX E

ISDN INTERFACE TYPE 140
Introduction
The optional ISDN Interface Type 140 allows you to send and receive fax
messages on high-speed high-quality digital networks. It will allow you to connect
the machine to an ISDN (Integrated Services Digital Network) for either Group 4
or Group 3 fax communication.
Caution: When connecting to the ISDN you should use the provided cable.
If a different cable is used, this could cause radio interference with
other equipment.
Attached to the modular cord that is used for the ISDN connection,
there is a ferrite core - please do not remove it.
A few of the features described earlier in this manual cannot be used over an
ISDN. These are as follows.
Manual reception
Telephone line type (DTMF/Pulse dial) selection
Manual dialing with the handset
On Hook Dial
RTI, TTI, CSI (these identifiers can only be used with Group 3 communication.
In Group 4 mode, another identifier called the Terminal ID is used instead. The
Terminal ID is explained on page 261)
However, Group 4 has the following major advantages over Group 3:
If your organization sends large volumes of material by fax, using Group 4 will
greatly reduce your communication costs as a result of the high speed of data
transmission.
Normal analog networks tend to be noisy, affecting the quality of received data.
However, communications over digital networks are of a high quality.
The Group 4 interface will greatly enhance other features, especially
broadcasting, transfer request, and other networking features, allowing
complex distribution of documents with just a few keystrokes. The types of
network that you can set up are described in the Networking section of this
manual (see page 53).
Note: Your sales or service representative will be able to help program all the
necessary group and transfer station numbers in the various broadcasting
terminals throughout your proposed network. Please coordinate with your
sales representative to obtain correct programming at the time of installation.
252