User manual ZYXEL OMNI 56K

[. . . ] User's Guide for ZyXEL Omni 56K and Omni 56K Plus Modems ZyXEL TOTAL INTERNET ACCESS SOLUTIONS ZyXEL Communications Corporation User's Guide for ZyXEL Omni 56K and Omni 56K Plus Modems ZyXEL Omni 56K Modem ZyXEL Omni 56K Plus Modem Trademarks: Product and corporate names mentioned in this publication are used for identification purposes only and may be properties of their respective owners. The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, guide, or otherwise, without the prior written permission of ZyXEL Communications Corporation. Disclaimer: ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. Neither does it convey any license under its patent rights nor the patents rights of others. [. . . ] Any character(ASCII 0-127) 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 will result in the modem's prompting to enter the supervisor password. 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 You will be asked for the original password and a new password and then to re-enter the new password for verification. For example: PASSWORD (Enter supervisor password) ******** PASSWORD (Enter new supervisor password) ******** 3-11 User's Guide for ZyXEL Omni 56K and Omni 56K Plus Modems Verify (Enter the new supervisor password again) ******** OK The command AT*Hn will modify the nth user password and the supervisor password on the screen for viewing. The commands below will enable different types and levels of security: Code *G0 *G1 *G2 *G3 *G4 *G5 Description Disables security function. Enables type 1 and level 2 security, with password check and call-back. Enables type 1 and level 2 security, with password check and call-back. Enables type 2 and level 2 security, with password check and call- back, remote site enters the call-back number. NOTE: Before the security type or level can be changed, the modem requires the supervisor password. For type2 security, the remote site will be prompted to enter the user password. If a correct password is not entered within this time limit, the line will be disconnected. If the remote site is to enter the call-back number, it will be prompted to do so. Fax function Fax Physical Layer Protocol Standard V. 17 V. 29 V. 27ter V. 21 Bit Rate [bps] 14400-7200 9600-4800 4800-2400 300 Baud Rate [baud] 2400 2400 1600/1200 300 Modulation TCM QAM/DPSK PSK/DPSK FSK Carrier Frequency [Hz] 1800 1700 1800 Table 9. Fax Physical Layer Capacity 3-12 User's Guide for ZyXEL Omni 56K and Omni 56K Plus Modems EIA Class 1/Class 2. 0 Command Set Please refer to Fax Command Set in Chapter 5. ITU-T T. 30 Fax Protocol The ITU-T T. 30 fax protocol is known as the G3 fax handshake signals and procedures. The modem takes full control of this protocol - initiating and terminating fax calls, managing the communication session, and transporting the image data. Therefore, the modem relieves the computer fax software of the T. 30 protocol handling. You modem allows for fax speeds up to 14400 bps when transmitting to a fax machine which complies with the V. 17 fax standard. Speeds will fall back to 12000, 9600, or 7200 bps in poor line conditions. When connecting to a G3 fax device, your modem allows for fax speeds up to 9600 bps and will automatically fall back to 7200, 4800, and 2400 bps if the line quality is poor. Voice Function Voice capability stands for the modem's ability to digitize incoming voice messages, which the computer stores and forwards. It also means that the modem can playback the recorded digitized voice on line for a message announcement. Voice IS-101 Command Set Please refer to the Voice command sets in Chapter 5. 4-bit Voice Data Compression The main issue in the digitized voice mode is the amount of storage required. A relatively simple ADPCM algorithm can reduce the speech data rate to half the rate and maintain about the same voice quality. [. . . ] Extended S-Registers "ATSn=x" Bit dec hex +nnn Note: S-register bit number, 'b', used in 'ATSr. b=n' and 'ATSr. b=?' Decimal value, 'x', used in 'ATSn=x' Equivalent Hexadecimal value. 'AT' is omitted when an AT command is referred to in the 'Reference' column. . 5-25 User's Guide for ZyXEL Omni 56K and Omni 56K Plus Modems Chapter 6 Firmware Upgrade The ZyXEL Omni 56K/Omni 56K Plus provides firmware upgrade function that you can upgrade the firmware either by upgrade software provided in the CD-ROM that comes with your modem package, or by terminal program such as Bitware or Hyperterminal. To obtain the latest firmware version, please go to ZyXEL's website site at http://www. zyxel. com. Upgrading by Software To upgrade the firmware by provided software, follow the steps listed below: Step 1. Insert the CD-ROM that comes with your modem package into your CD-ROM driver. [. . . ]