Multitech MMH900 User's Guide Page 187
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Glossary
187
Circuit switching: The temporary connec-
tion of two or more communications channels
using a fixed, non-shareable path through the
network. Users have full use of the circuit
until the connection is terminated.
Clock: A timing signal generated by an
oscillating circuit which is used to synchronize
data transmissions.
Command: An instruction that tells a
computer to begin, continue or end a specific
operation.
Command mode: One of two states of an
intelligent (i.e. programmable) device. The
mode in which commands can be issued to
alter operating parameters.
CRC (Cyclic Redundancy Check): A field
used in packetized data that contains two 8-bit
BCCs ( Block Check Characters) as the binary
result of an algorithm performed on the data
bits in the packet. A CRC is used for error
detection by many synchronous protocols.
CTS (Clear To Send signal): With communi-
cations between modems, an RS-232 signal
sent from the modem to the DTE that
indicates it is ready to accept data. Contrast
with RTS.
D
DC (Direct Current): This is usually
understood to mean a constant voltage supply
that fluctuates only a nominal amount. An
analog or digital signal that may vary in
voltage level, but it never crosses the
reference voltage (usually called ground).
Contrast with AC.
De facto standards: A de facto standard is
one of two types of voluntary standards
recognized by a given market. It is introduced
by a single vendor and becomes a standard
by its widespread use and acceptance by
other vendors. AT&T's Bell 212A, IBM's
Binary Synchronous Protocol or DEC's VT-
100 terminal protocol are examples of de
facto standards. Compare with de jure
standards.
De jure standards: A de jure standard is one
of two types of voluntary standards. It
represents the collective consensus of the
industry and users for a particular aspect of
manufacturing. CCITT's V and X standards
(e.g. V.32 and X.25) are examples of de jure
standards. Compare with de facto standards.
Decibel (dB): A unit of measurement for
signal strength based on logarithmic incre-
ments. A decibel is a relative measurement
that is derived from an initial reference level
and a final observed level.
Default: This is preset value or option in
software packages, or in hardware configura-
tion, that is used unless you specify
otherwise.
Device driver: Software that controls how a
computer communicates with a device, such
as a printer or mouse.
Digital signal: Digital devices, such as
terminals and computers, transmit data as a
series of electrical pulses which have discrete
jumps rather than gradual changes.
Digital Transmission: A method of
electronic information transmission common
between computers and other digital devices.
Analog signals are waveforms: a combination
of many possible voltages. A computer's
digital signal may be only "high" or "low" at
any given time. Therefore, digital signals may
be "cleaned up" (noise and distortion
removed) and amplified during transmission.
DIP switch (pronounced "dip switch"): A
set of tiny toggle switches, built into a DIP
(dual in-line package), used for setting
configurable parameters on a PCB (printed
circuit board).
DPSK (Differential Phase Shift Keying): A
common form of phase modulation used in
modems. It does not require complex
demodulation circuitry and is not susceptible
to random phase changes in the transmitted
waveform, thus reducing errors during
transmission.
DSR (Data Set Ready): An RS232 signal
sent from the modem to the computer or
terminal indicating that it is able to accept
data. Contrast with DTR.
DTE (Data Terminating Equipment): A term
used to include any device in a network which
generates, stores or displays user information.
DTE is a telecommunications term which
usually refers to PCs, terminals, printers, etc.
- MMH900 Series Statistical 1
- Multiplexer 1
- User Guide 1
- S000315A Revision A 2
- Contents 3
- Description 7
- 1.1 Introduction 8
- 1.2 About This Manual 8
- 1.3 Background 10
- 1.3.1.2 Communications 12
- 1.4 Product Description 13
- 1.5 System Features 16
- 1.5.1 Response Time Control 16
- 1.5.2 Dynamic Buffering 16
- 1.5.3 Flow Control 17
- 1.5.4 Diagnostics 17
- Reporting 18
- 1.5.7 Parameter Memory 18
- 1.5.8 Channel Flexibility 18
- 1.5.9 Command Modem 18
- 1.5.10 Composite Link 19
- Interconnection 20
- 1.7 DOC Terminal Equipment 22
- 1.8 Specifications 23
- 1.8.1 Channels 23
- 1.8.2 System Control 23
- 1.8.3 Composite LInk 24
- 1.8.4 33,600 bps Link Modem 24
- 1.8.5 56,000 bps DSU 24
- 1.8.6 ISDN Terminal Adapter 25
- 1.8.7 Command Modem 25
- 1.8.8 Electrical/Physical 25
- Chapter 2 - Configuration 26
- 2.1 Introduction 27
- 2.2 Configuration 1 28
- 2.3 Configuration 2 30
- 2.4 Configuration 3 31
- Descriptions 33
- 3.1 Introduction 34
- 3.2 Front Panel 34
- 3.3 LED Indicators 35
- Internal Composite Link (DSU) 37
- Internal Link Device (Modems) 38
- COMPOSITE LINK 39
- 3.5 Switches/Jumper/Shunt 41
- 3.5.1 8-Position DIP Switch 41
- 3.5.2 4-Position DIP Switch 42
- 3.5.3 144RKWL/OtherJumper 43
- 3.5.4 V.24/V.35 Shunt 43
- Chapter 4- Installation 44
- 4.1 Introduction 45
- 4.2 Safety Warnings 45
- 4.3 Unpacking 45
- RS232C/V.35 46
- INTERNAL 46
- V.35 V.24 47
- Supervisory Console 48
- Channels 49
- Parameters (&W) command 50
- Chapter 4 - Installation 50
- Chapter 5 - Commands 51
- 5.1 Introduction 52
- 5.2 Command Description 57
- 5.2.1 General Commands 57
- The H1 Menu is as follows: 59
- The H2 Menu is as follows: 60
- UP = 16/32 MM 60
- DN = 900 MMH/MMV 60
- The H3 Mend is as follows: 61
- The H4 Menu is as follows: 61
- The H5 Menu is as follows: 62
- The H6 Menu is as follows: 62
- The H7 Menu is as follws: 63
- The H8 Menu is as follows: 63
- CHANNEL DEVICE 66
- INITIATED PACING 66
- MultiMux 67
- 5.2.3 Composite Link Commands 73
- LINE LOAD TYPE TIMER TIME 75
- OFF INTERNAL 10ms 3 75
- 5.2.8 Test Commands 86
- 5.2.9 Command Modem commands 88
- Chapter 6- Operating 89
- Procedures 89
- 6.1 Introduction 90
- Chapter 7 - Troubleshooting 96
- 7.1 Introduction 97
- 7.3 Test Cables 98
- Composite Link 99
- Loopback Cable 99
- 7.4 Troubleshooting Guide 100
- Channel device losing data 105
- 7.5 Channel Device Testing 106
- Procedure 107
- Technical Support 111
- 8.1 Introduction 112
- 8.2 Warranty 112
- Customers 113
- Distributors 115
- Appendices 116
- Appendix A 117
- Appendix B 118
- Appendix C - Cabling Diagrams 120
- Channel Cables 120
- Command Port Cables 121
- Appendix D 124
- Command Modem Commands 124
- Appendix F 142
- Flow Control Background 142
- MiniComputer Flow Control 143
- Appendix G 145
- MMH2834 S-Registers 145
- Appendix H 148
- Dial Back-up 148
- Appendix I 149
- Testing Your MMH2834 149
- I.1 Introduction 149
- Local MultiModem 150
- Type ATU0 or ATU1; hit ENTER 150
- Digital Analog DigitalAnalog 151
- I.5 Synchronous Mode Testing 155
- Digital Analog 156
- AnalogDigital Analog 157
- DigitalAnalogDigital Analog 158
- Modem Commands 159
- J.1 Introduction 159
- #S Change SETUP Password 161
- J.1.1 Dialing Action Commands 162
- J.1.2 Dial Modifier Commands 164
- Commands 171
- Immediate Action Commands 182
- Glossary 184
- S000315A 200
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Motorola ic402 manuals
Owner’s manuals and user’s guides for Phones Motorola ic402.
We providing 1 pdf manuals Motorola ic402 for download free by document types: User Manual
Table of contents
MESSAGING
10
MY CONTENT
10
SETTINGS
11
5: ROAMING
12
6: LOCATION
12
7: SECURITY
12
8: OTHERS
12
Getting Help
20
Sprint 411
21
Phone Basics
27
Accessories
42
O >Settings
44
Making Calls
50
Section 2B
82
Silence All
85
TTY Use
94
WARN ING
95
Entering the PIN
104
Changing the PIN
104
Erasing Data
111
Net Guard
112
Section 2D
113
Set Mode
116
Using Call Guard
117
Call Alerts
121
4. Press O
124
Call History
125
Using Contacts
129
About Contacts
130
Contacts
131
Assigning a Date
137
While Copying
146
Section 2G
148
Event Alerts
150
Event Alert Menu
150
Viewing Events
150
Erasing an Event
151
Voice Records
156
Service Features
159
Using Voicemail
161
Using Caller ID
169
Voice Command
172
1. Press *s
174
Data Services
175
Going Back
180
Going Home
180
Information
193
How It Works
197
Accreditation
197
Li Ion BATT
201
Choking Hazards
202
Glass Parts
202
Battery Tips
205
Organization
207
Owner’s Record
208
Warranty
217
Software
218
Who Is Covered?
218
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