| Loopback Tests | 60 | 
| Local Analog Loopback Test (V.54 Loop 3) | 61 | 
| Remote Digital Loopback Test (V.54 Loop 2) | 62 | 
| Local Digital Loopback Test (V.54 Loop 2) | 63 | 
| Windows 95/98 Troubleshooting | 64 | 
| Determining Why USB Support Is Not Present | 64 | 
| Installing Microsoft USB Support | 64 | 
| Chapter 7 - Upgrade Procedure | 
 | 
| Introduction | 66 | 
| Upgrade Overview | 66 | 
| Step 1: Identify the MT4X56USB Firmware | 66 | 
| Step 2: Identify the Current Firmware Version | 66 | 
| Step 3: Download the Upgrade File | 67 | 
| Step 4: Extract the Upgrade Files | 67 | 
| Step 5: Clear Your Stored Paramenters | 67 | 
| Step 6: Upgrade the Modem’s Firmware | 68 | 
| Step 7: Restore Your Parameters | 68 | 
| Chapter 8 - Service, Warranty and Tech Support | 
 | 
| Introduction | 70 | 
| Software User License Agreement | 70 | 
| Limited Warranty | 71 | 
| 71 | |
| Tech Support | 71 | 
| Recording MT4X56USB Information | 71 | 
| Contacting Tech Support via  | 72 | 
| Service | 72 | 
| Appendices | 
 | 
| Appendix A - Regulatory Information | 74 | 
| Class B Statement | 74 | 
| FCC Part 68 Telecom | 75 | 
| FAX Branding Statement | 76 | 
| Canadian Limitations Notice: | 76 | 
| EMC, Safety and Terminal Directive Compliance | 77 | 
| Commission Decision "CTR21" | 77 | 
| New Zealand Telecom Warning Notice | 77 | 
| Appendix B - V.90 Support | 78 | 
| Introduction | 78 | 
| V.90 Troubleshooting | 78 | 
| Glossary of Terms | 
 | 
| Index | 
 |