User Guide Network Device MT5600BAV.92, MT5600BAV.90, MT5600BLV.90
Table Of Contents
- Table of Contents
- Chapter 1 - Description and Features
- Chapter 2 - Installation
- Chapter 3 - Using the Front Panel
- Modem Configuration
- LED Indicators
- Liquid Crystal Display (LCD)
- Option Selection
- Menu Structure
- Menu Overview
- Status Trunk
- Basic Options Trunk
- Advanced Options Trunk
- Remote Configuration Options Trunk
- Diagnostic Options Trunk
- Phone Number Memory Options Trunk
- Caller ID Options Trunk
- Menu Options
- Status
- Basic Options
- Advanced Options
- Remote Configuration Options
- Diagnostic Options
- Phone Number Memory Options
- Caller ID Options
- Chapter 4 - Leased Line Operation
- Chapter 5 - Remote Configuration
- Chapter 6 - Callback Security
- Chapter 7 - Troubleshooting
- None of the Indicators Light
- The Modem Does Not Respond to Commands
- The Modem Cannot Connect When Dialing
- The Modem Disconnects While Online
- The Modem Cannot Connect When Answering
- File Transfer Is Slower Than It Should Be
- Data Is Being Lost
- There Are Garbage Characters on the Monitor
- The Modem Doesn't Work with Caller ID
- Fax and Data Software Can't Run at the Same Time
- Appendix A - Regulatory Compliance
- Appendix B - Technical Specifications
- Appendix C - Warranty, Service, and Technical Support
- Appendix D - Upgrading the Firmware
- Appendix E - Installing a Modem Under Linux
- Appendix F - Pin Descriptions
- Index

Chapter 6 - Callback Security
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Multi-Tech Systems, Inc. MT5600BA/BL Series User Guide
The following AT commands are used with callback security.
Command: #DB
n
Callback Enable/Disable
Values:
n
= 0 or 1
Default: 0
Description: Enables or disables callback security. When callback security is
enabled, phone number memory locations 0–4, used for quick
dialing and DTR dialing, become unavailable and are replaced
by callback security memory locations 1–30. The phone num-
ber memory locations and their contents are restored when
callback security is disabled.
#DB0 Disables callback security.
#DB1 Enables callback security.
Command: #CBN
y
=[-]
x
Store Callback Number
Values:
y
= 01–30
x
= dialing string
Default: None
Description: Stores the callback dialing string x in memory location y. The
dialing string can include the digits 0 through 9 and any of the
following characters: #, *, comma (,), semicolon (;), W, A, B, C,
and D. Up to 30 characters can be used. Example:
AT#CBN01=9,16127853000. If the optional - character precedes
the dialing string, and the caller appends the same character to
the password, the caller is connected immediately, and the
hangup and callback are skipped.
Command: #CBP
y
=
x
Store Callback Password
Values:
y
= 01–30
x
= password (6–10 characters)
Defaults: None
Description: Stores callback security password x in memory location y. The
password must have 6 to 10 characters.
Note: A direct connect password may not end with a hyphen (-).