Home WTI User's Guides
Warnings and Cautions
1. Introduction
2. Unit Description
2.2. Back Panel
3. Getting Started
3.1. Communication Parameters
3.2. Apply Power to the APS-16
3.3. Connecting your PC to the APS-16
3.4. Communicating with the APS-16 Unit
4. Hardware Installation
4.1. Configure Setup Switches
4.1.1. Default Baud Rate
4.2. Initialize Unit to Default Settings
4.3. Connecting Devices to the APS-16
5. Configuration
5.1. Access to the APS-16 Command Mode
5.2. Defining and Reading the Site I.D.
5.3. Port Configuration
5.3.1. Configuration Conventions
5.3.2. Port Modes
5.3.3. Command Availability
5.3.4. Port Configuration Menu
6. Operation
6.1. Any-to-Any Mode
6.1.1. Port Connection and Disconnection Using ASCII Commands to Connect Ports Disconnecting Ports
6.1.2. Defining Hunt Groups
6.2. Passive Mode
6.3. Buffer Mode
6.3.1. Reading Data from Buffer Mode Ports
6.3.2. Port Buffers
6.4. Modem Mode
7. Saving Configuration Parameters
7.1. Sending Parameters to a File
7.2. Restoring Saved Parameters
8. Command Reference Guide
8.1. Command Conventions
8.2. Command Response
8.3. Command Summary
8.4. Command Set
A. RS-232 Port Interface
B. Specifications
C. Customer Service

6.4. Modem Mode


In addition to allowing data transfer, the Modem Mode also provides additional functions specifically related to modem communication. A Modem Mode Port can perform all functions normally available in the Any-to-Any Mode. Any APS-16 Port can be configured as a Modem Mode Port.

When the Modem Mode is selected, the port configuration menu (command /P) will display three additional prompts, which allow the user to re-define the modem reset string, initialization string, and hang-up string.

When the modem mode is selected for a port with All command capability, the password feature should be defined and enabled. This will prevent unauthorized access to the Command Mode. When a call is received by the APS-16, the unit will prompt the caller to enter a password. The APS-16 will allow three attempts to enter the password. If the correct password is not entered in three attempts, or if the user does not respond to the password prompt within 30 seconds, the modem will disconnect. The password can be defined and enabled by invoking the /P command as described in Section 5.3.4.


•                      When a Modem Mode Port exits from Command Mode, or the DCD line is lost while the Command Mode is active, the APS-16 will pulse the DTR line to the modem. The unit will then send the user-defined modem command strings to make certain the modem is properly disconnected and re-initialized.

•                      When an external modem is installed at an APS-16 port, other ports can use the modem for calling out. To call out, invoke the /C command to connect to the port, and access the modem as you normally would.