PN 88300150
4/3/01
3
CHAPTER 1 - INTRODUCTION AND DESCRIPTION
1.1 Introduction .................................................................................6
1.2 How To Use This Manual ...........................................................6
1.3 Description ..................................................................................7
1.4 FCC Regulations for Telephone Line Interconnection................8
1.5 Canadian Limitations Notice .....................................................10
1.6 Compliance with BABT Requirements (MT2834MRK only) .....11
1.7 Technical Specifications ...........................................................11
1.8 Power........................................................................................13
1.9 Modem LED Indicators .............................................................13
1.10 BUSY Switch.............................................................................14
1.11 Controls on PC Board...............................................................14
1.12 MT2834MRK Installation Notes ................................................14
CHAPTER 2 - DIALING AND ANSWERING
2.1 Introduction ...............................................................................15
2.2 Automatic Leased Line Restoral Operation ..............................15
2.3 Manual Dial Backup Call Termination.......................................15
2.4 Dial Back-up Leased Line Restoral ..........................................16
2.5 Dial-up Automatic Answering....................................................16
2.6 Dial-up Handshaking Details ....................................................16
2.7 Call Termination........................................................................16
CHAPTER 3 - COMMAND MODE OPERATION
3.1 Introduction ...............................................................................18
3.2 Typographic Conventions Used in This Manual .......................18
3.3 Functional Modes .....................................................................19
3.4 AT Commands ..........................................................................21
3.5 Result Codes ............................................................................24
3.6 Command Mode Fundamentals ...............................................26
3.7 Dialing Commands ...................................................................32
3.8 Immediate Action Commands...................................................34
3.9 Configuration Commands .........................................................36
CHAPTER 4 - S-REGISTERS
4.1 Introduction ...............................................................................38
4.2 Reading and Assigning S-Register Values...............................38
4.3 AT Commands that Affect S-Registers.....................................42
4.4 Summary...................................................................................43
CHAPTER 5 - ERROR CORRECTION, DATA COMPRESSION AND
SPEED CONVERSION
5.1 Introduction ...............................................................................45
5.2 How V.42 Detects and Corrects Errors.....................................46
5.3 Data Compression ....................................................................47
5.4 MNP Classes ............................................................................48
5.5 V.42 Mode Select Command (#L) ............................................48
5.6 Modes of Operation ..................................................................49
5.7 Introduction to Flow Control......................................................49
5.8 Modem-Initiated Flow Control...................................................50
5.9 Terminal/Computer-Initiated Pacing (&E13).............................50
5.10 Xon/Xoff Pass-Through (&E7) ..................................................51
5.11 Normal Mode Modem Flow Control (&E10 and &E11).............52
5.12 Hewlett Packard ENQ/ACK Pacing (&E9) ................................52