User's Manual
Table Of Contents
- Contents
- Hardware Installation
- Software Supplied
- Hardware Installation
- Unpacking and Inspection
- Other Required Equipment
- Installing Card and Cables
- PRO/100 Modem and Ethernet Connections
- Windows* 95 Installation
- Which Version of Windows 95?
- How Can I Tell Which Version I Have?
- Additional Information in this Chapter
- Windows 95 Installation (Retail Version)
- Windows 95 OSR2 Installation (OEM Version)
- How to Install for Windows 95 and NetWare*
- Utilities
- Power-Saving Modes
- Windows 95 Troubleshooting
- Troubleshooting Checklist
- Windows 95 Driver Parameters Reference
- Windows NT Installation
- Which Version of Windows NT?
- How Can I Tell Which Version and Service Pack I Have?
- Additional Information in this Chapter
- Windows NT 4.0 Installation
- Windows NT 3.51 Installation
- Power-Saving Modes
- Utilities
- Windows NT Driver Parameters Reference
- Windows 3.x/DOS Installation
- Installation under MS-DOS
- Windows 3.x Network Driver Parameters
- ODI Settings (for M16BODI.COM)
- Error Messages for Windows 3.x and MS-DOS Drivers
- Windows 3.x Troubleshooting
- Computer-Specific Application Notes (Windows 3.x)
- Utilities and Applications
- Utilities
- Country Identifier Utility
- Modem Test Utility
- Diagnostic Test Utility (M16BTEST.EXE)
- COM port monitor (Windows 3.x only)
- Communications Application Notes and Modem
- Modem Reference
- Result Codes
- AT Command Reference
- S-Register Reference
- Automated Customer Support
- Specifications
- Agency Notices
- Software License Agreement
- Index

Modem Reference 6-31
S46 Data Compression Selection
The setting of this register is used to turn data compression on or
off. It is set by AT%Cn.
Data compression can only be enabled when the modem is operat-
ing in an error-control (EC) mode using either V.42 LAP-M or
MNP protocols.
S46=0 Modem will not attempt negotiation for data compres-
sion
S46=2 Modem will negotiate with a remote modem for data
compression (default).
S46=136 Same as S46=0
S46=138 Same as S46=2
S48 LAPM Error Control and Feature Nego-
tiation
S48=7 Negotiation enabled
S48=128 Negotiation disabled; forces immediate fallback options
specified in S36.
The following table shows the S36 and S48 configuration settings needed
to negotiate certain types of connections.
S48=7 S48=128
S36=0,2 LAPM or hangup do not use
S36=1,3 LAPM or buffered buffered
S36=4,6 LAPM, MNP, or hangup MNP or hangup
S36=5,7 LAPM, MNP, or buffered MNP or buffered
S89 Timer to Control Sleep Mode
This register displays the number of seconds of inactivity (no
characters sent from DTE, no RING) in the off-line command state
before the modem places itself into standby mode. A value of zero
prevents standby mode. Default is 30. Range is 0 and 5 - 65.