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7500 Configurations and Features
Using the available hardware and software options, you can configure your 7500 as:
Asynchronous DCE,
Asynchronous DTE, or
Synchronous DCE.
The procedures for changing the configuration are described in CHAPTER 8: INSTALLING THE
7500.
This manual is arranged in sections that reflect the operational differences in the configurations of
the 7500. In all configurations, you may operate the 7500 using the buttons and display on its front
panel. The front panel menu system is the first method of operation described.
If your 7500 is configured as an asynchronous DCE, and it is attached to a data terminal or personal
computer, you will probably want to operate it from the keyboard of your attached terminal. This
method of operation is described in CHAPTER 5: ASYNCHRONOUS DCE CONFIGURATION.
If your 7500 is configured as an asynchronous DTE used in a modem pool, refer to CHAPTER 6:
ASYNCHRONOUS DTE CONFIGURATION to learn more about modem pooling operation. The
primary mode of accessing asynchronous DTE features is through the front panel of the 7500.
The capabilities of the synchronous DCE configuration are accessed exclusively through the front
panel of the 7500 (See CHAPTER 7: SYNCHRONOUS DCE CONFIGURATION).
A brief outline of the capabilities of the different configurations follows.
Features Common to All Configurations
The following operations can be controlled with buttons and display on the 7500:
Data option settings
Self-test, local, and remote loopback tests, EIA lead status
Program ID
Contrast adjustment.
Asynchronous DCE Features
EIA-232D interface.
Packet and circuit switched data communications.
Data options can be changed and data calls can be setup via commands from the EIA-232D
interface. These commands can be typed from the keyboard of an attached terminal or generated
from a computer.
Ability to change options without dropping a data call.
Automatic or manual answering of incoming data calls.
Data rates of 0.3, 1.2, 2.4, 4.8, 9.6, and 19.2 kilobits per second (kbps).
Asynchronous full-duplex operation.
CHAPTER 2: PRODUCT OVERVIEW
7
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