User's Guide for ZyXEL Omni 56K USB Modem

3.3.2 Security Function

The Omni modem provides a security function, that (when enabled) prevents an unauthorized user from making a connection. Two types of security function are provided. Type 1 security is used when the remote modem is also a ZyXEL modem; type 2 security is used when the remote modem is any other brand of modem.

With the type 1 connection, the dial-in (remote) modem sends in its supervisor password for checking at the initial connection handshake, and the local modem checks this password against its pre-stored acceptable password list. With a type 2 connection, the remote terminal is prompted to enter the password at the initial connection and the local modem does the password checking.

Two levels of security are provided. With level 1 security, the local modem maintains the connection if the password check is OK, otherwise the line is disconnected. With level 2 security, the local modem disconnects the line if the password has been found in its pre-stored acceptable list and then dials back the phone number corresponding to the dial-in password. The line is simply disconnected if the password does not match.

Four user passwords may be defined. The corresponding four dial-back numbers are the modem’s four stored phone numbers. Any character (ASCII 0 to 127) can be used in the password. The maximum password length is 8 characters.

The security functions are only accessible through AT commands in terminal mode. Any access attempt results in the modem’s prompting to enter the supervisor password. The attempt is rejected if the entered password is not correct. The default supervisor password is ZyXEL when the modem is shipped from the factory. This supervisor password is also the password sent for automatic password checking in a type 1 connection. To modify the supervisor password, use

AT*HS

3-11

Page 30 Page 32
Page 31
Image 31
ZyXEL Communications 56K manual Security Function
Page 30 Page 32

56K specifications

ZyXEL Communications has long been a key player in networking technologies, and their 56K modems stand out as a testament to the company’s commitment to high-performance connectivity. The ZyXEL 56K modem provides users with efficient dial-up internet service, delivering reliable performance for both home and small office environments.

One of the main features of the ZyXEL 56K modem is its data transfer capability, offering speeds of up to 56 Kbps. This speed is accomplished by utilizing the latest advancements in modem technology, enabling users to experience smoother browsing, faster downloads, and efficient email communications. Despite being primarily a legacy technology, the ZyXEL 56K modem continues to be valued in areas where broadband connectivity options are limited or unavailable.

The ZyXEL 56K modem utilizes V.90 and V.92 standards—these protocols define how data is transferred over phone lines. With the V.90 standard, the modem can achieve a maximum download speed of 56 Kbps while upload speeds can reach up to 33.6 Kbps with the V.92 standard. V.92 also introduces enhanced features such as a modem on hold, enabling users to receive voice calls while connected to the internet.

In terms of characteristics, the ZyXEL 56K modem is designed with user experience in mind. Its compact, lightweight design allows easy installation and placement, making it ideal for both home users and professionals. The intuitive user interface, coupled with straightforward installation procedures, ensures that even those with minimal technical knowledge can set up the device without hassle.

Additionally, the ZyXEL 56K modem supports various connectivity options, including serial and USB interfaces, allowing compatibility with a wide range of computers and operating systems. This versatility ensures that users can seamlessly connect to their existing devices, enabling broad usage opportunities.

The modem also features built-in error correction and data compression techniques, which improve data integrity and optimize transmission speeds. Overall, the ZyXEL Communications 56K modem remains a reliable choice for users who require dependable dial-up internet access, showcasing the brand's dedication to fostering connectivity in diverse environments.
Top Page Image Contents