vii
Contents (continued)
Reinitializing Memory Using the AT&F Command ................................ 4-5
Configuration Option Sets ............................................................................ 4-6
What is an Option Set? ............................................................................. 4-6
Configuring an Option Set ....................................................................... 4-10
Option Set Defaults .................................................................................. 4-12
326X V.32bis and 326XFAST Modem Application Examples .................... 4-18
Option Set 1—Async Calls to Central Site Using AT ACU .................... 4-19
Option Set 2—Sync Answering Central Site Without ACU .................... 4-20
Option Set 3—Sync Calls to Central Site, V.25bis ACU ......................... 4-20
Option Set 4—Async Answering Central Site without ACU (Models 3260/62/65/67)
4-21
Option Set 4—Synchronous Leased Line Applications with Dial Restoral (Models
3261/63/66/68) ..................................................................................... 4-22
326XFAST-SDC Modem Application Examples ......................................... 4-22
SDC Pre-Operation Notes ........................................................................ 4-23
Configuring the Modem for SDC Operation ........................................... 4-23
SDC Sample Applications ........................................................................ 4-24
Remote Access Reset ................................................................................... 4-29
Operation .................................................................................................. 4-29
When Remote Access Reset Is Disabled ................................................. 4-29
Chapter 5. Using the AT Automatic Calling Interface
Introduction .................................................................................................. 5-2
What is the Attention (AT) Command Set? .................................................. 5-3
What Role Does Communications Software Play? .................................. 5-3
Using AT Commands ................................................................................... 5-3
Entering AT Command Lines ................................................................... 5-3
Autobaud Feature ..................................................................................... 5-5
The Escape Sequence—(+++) ................................................................. 5-5
Non-Configuration AT Commands .......................................................... 5-6
S-Registers ............................................................................................... 5-9
Chapter 6. Troubleshooting Guide
Introduction .................................................................................................. 6-2
Troubleshooting ............................................................................................ 6-2
326X Series Modem Diagnostic Tests .......................................................... 6-10
Synchronous Data Compression (SDC) Testing ...................................... 6-11
Appendix A. Configuration Quick Reference
Configuration Quick-Reference—Menu Trees ............................................ A-2
For More Detail ........................................................................................ A-2
Audience and Assumptions ...................................................................... A-2
Performing Numeric Entry ........................................................................... A-37
