User's Guide

SB300 Series Modems User’s Guide
Page vi Proprietary and Confidential 2110059 Rev 1.0
3.5. Using Watcher for Modem Setup....................................................................13
3.5.1. Configuring Watcher........................................................................13
3.5.2. Configuring Cellular Settings using Watcher.....................................14
3.6. Monitoring CDPD With Watcher...................................................................15
3.7. About the Watcher Program Window............................................................16
3.7.1. Icon Status .......................................................................................16
3.7.2. Watcher Menus and Commands........................................................16
3.7.3. Toolbar Buttons................................................................................18
3.7.4. Status Indicators...............................................................................18
3.7.5. Updating Status Indicators................................................................18
3.7.6. Quitting Watcher..............................................................................18
3.8. Updating Modem Firmware............................................................................19
4. Basic Modem Operation..............................................................21
4.1. Introduction.....................................................................................................21
4.2. Modem Modes and States ...............................................................................21
4.2.1. Modes ..............................................................................................21
4.2.2. States ...............................................................................................21
4.2.3. Conditions........................................................................................22
4.3. Modem Communications with the Host (DTE) ..............................................22
4.3.1. DTE Communication Options...........................................................22
4.3.2. DTR Signal Handling.......................................................................22
4.3.3. DSR Signal Control..........................................................................23
4.3.4. Local Flow Control ..........................................................................23
4.3.5. Result Code Formats ........................................................................23
4.4. Communication Protocols and Stacks ............................................................24
4.4.1. SB300 Series Internal Protocol Stacks ..............................................24
4.5. Modem Handshaking (SB320) ........................................................................25
4.5.1. Modem Protocol Layers....................................................................25
4.5.2. CSC vs. Wireline..............................................................................26
5. CDPD Operation...........................................................................29
5.1. Cellular Digital Packet Data (CDPD) Introduction........................................29
5.1.1. Security............................................................................................29
5.1.2. Architecture .....................................................................................30
5.1.3. Modem Registration.........................................................................30
5.1.4. CDPD Radio Coverage.....................................................................31
5.1.5. CDPD and the SB300 Series Modems...............................................31