Introduction

This Technical Support Solutions Guide contains information necessary to support the HP FAX HP FAX-900, and HP FAX-950 facsimile (fax) machines. This guide is divided into six chapters as follo

DChapter 1 Product Information

DChapter 2 Installation and Configuration

DChapter 3 Operation and Usage

D Chapter 4

Optimization

DChapter 5 Problem Resolution

DChapter 6 Service and Support Information

Fax Product Technology

HP fax machines are standalone systems designed to send and receive facsimiles by way of t the system includes a modem, document scanner, and a printer. External features oft document feeder, telephone handset, telephone line jack, and control panel. The user plu phone jack, like an ordinary telephone or answering machine, and it is ready to send and

Technical Overview

Telephone networks are duplex analog lines because they were originally designed to car directions. Because computer data is encoded digitally, a “translator” is needed to conver signal. These translators, or modems (modulator/demodulator), are used at each end of t

The sending modem converts the digital data to analog data by varying the frequency, pha to represent the data bits. The receiving modem converts the analog signal back to digi receiving systems communicate using agreed-upon protocols or standards.

HP fax machines are CCITT Group 3 standard machines. These Group 3 machines use a digital co convert the scanned image data into ones and zeroes. The schemes used are Modified Read (MR) (MH), and Modified Modified Read (MMR). The digitally coded scanned image is converted to analo modem before being transmitted by way of the telephone line. Images received by way of analog form and must be converted into a digitally coded image by the modem.

1￿2 Product Information