User manual SIMPLETECH 61000-00228-000

[. . . ] 28. 8 Communicator V. 34 Data/Fax Modem Plug n' Play PC Card User Guide Document Part Number 61000-00228-000 i 1-800-367-7330 3001 Daimler Street, Santa Ana, California 92705 (714) 476-1180 (714) 476-1209 fax ii 28. 8 Communicator V. 34 Data/Fax Modem Plug n' Play PC Card User Guide iii Limited Warranty Simple Technology Incorporated guarantees its products to be of the highest quality, and to be free of defects in material, design and workmanship. STI will repair or replace this product, without charge for either parts or labor, if it is returned due to defects in material, design, and/or workmanship only. This guarantee applies only if the product has not been misused, modified, repaired, neglected, improperly installed, abused, or otherwise damaged as has not been mentioned above. Copyright © Copyright 1995 Simple Technology Inc. , all rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form, by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without expressed written consent of STI. Disclaimer Specifications subject to change without notice. [. . . ] This test checks the operation of your modem's transmitter and receiver. Your modem should be on-hook and in command mode. This specifies a test period of 10 seconds. This initiates the local analog loopback test. If your modem is working properly, you will see this character pattern echoed to the screen. The test will end automatically after 10 seconds. Return your modem to its original state by typing ATZ <Enter>. 2. 6. &T2 Reserved. 30 &T3 Local digital loopback test. This test verifies the operation of two connected modems and the phone channel. Your modem should be on-hook and in command mode. This specifies a test period of 10 seconds. Establish a connection with the remote modem by typing ATDnnn-nnnn <Enter>. Issue the escape sequence to put the modem back into command mode (type +++ without pressing <Enter>). When you see the OK message, your modem is in command mode. Issue the command AT &T3 <Enter>. This initiates the local digital loopback test. Have someone at the remote modem type a simple character pattern. This character pattern then loops through your modem back to the remote modem. Everything is working properly if the original character pattern is echoed back to the remote user's screen. The test will end automatically after 10 seconds. When your testing is complete, hang up the line and return your modem to its original state by typing ATHZ <Enter>. 2. 8. &T4 Allows local modem to accept a request from the remote modem for a remote digital loopback test. [. . . ] Enable fallback from MNP 10 to V. 22bis/V. 22 (-Q1). 74 S46 Data Compression Control. Range: 136 or 138 Default: 138 In Profile: Yes Writeable: Yes 136 138 Disable compression. Enable compression. S48 V. 42 Error Correction Negotiation. Range: 0, 7, 128 Default: 7 In Profile: Yes Writeable: Yes 0 7 128 Disable negotiation and proceed with LAPM. [. . . ]