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Telephony
Telephony. Articles with illustrations and detailed explanations:
1x5 Telephone Microprocessor Switch
A device for checking telephone sets
A simple adapter for recording a conversation from a telephone line
A simple device for checking phones
A simple indicator of a busy telephone line
Adaptation of imported phones
Adapter for AVU
Against telephone pirates
Amateur radio telephone RTF-92
Amplifier for a modem
Amplifier for Phone
Amplifier to the Spectrum
Amplifier to the telephone
And again about paired telephones
Another Phone Watchdog
Another telephone Amplifier
Another version of the antenna for a cell phone
Answering machine in telephone sets with CLI
Answering machine reporting time
Anti-CLI
Automatic recording of a telephone conversation
Backup power for a phone with CLI
Bug. Micro Power Radio Transmitter
Busy phone line indicator
Caller ID device
Calling a Parallel Phone
Calling device for hubs
CLI based on the Panasonic KX-T2365 phone
CLI based on the PANASONIC KX-T2365 telephone
CLI console to computer Electronic Secretary
CLI power source
CLI working principle
CLI-Z80 Interface
Completion of the telephone
Connecting the sound card to the phone
Connecting the sound card to the telephone line
Conversation node for a telephone set
Cordless phones and all about them
Design and repair of the power supply unit of the PANASONIC KX-F50 fax machine
Device for automatic reset of the processor in CLI
Dialer IC Protection
Diode Disconnect Prefix for Phone
DTMF standard number identifier
Electronic call for a telephone on a chip
Electronic Pulse Corrector
Electronic Secretary
External antenna for a GSM cell phone
External antennas of cell phones
Fax machine - printer and scanner
Finalizing the CLI on the Z80
FSK standard number determinant
Generator of the musical phrase on integral timers
Hours of telephone conversations
How to connect several devices via RS-232 interface
How to connect the ADSL splitter correctly
How to replace an imported microcircuit in a telephone set
Indicator of listening to a conversation on a parallel phone
Indicator of telephone calls
Indicator of telephone calls
Indicator of the busy telephone line
Indicators for a paired phone
Intercity Censor
Intercity Code Exit
Intercom
Intercom - hands-free communication console
Intercom Director-Secretary
Intercom from old phones
Intercom on LM386 chip
Intercom via 220 V network
Intercom with automatic call
Intercom with time division channels
Interlock with light indication
ISDN Network
Light instead of a call
Light Phone
Line Hold Prefix
Load Management with CLI
Method for connecting a parallel telephone
Miniature radio telephone
Mobile Features
Modem and Phone Protection
Multi-functional telephone master device Berkut
Music Phone Call
Narrowband filter detector
Negotiating machine
Optical fiber lines and communication
Optical telephone
Organization of access to the networks of satellite operators
Outgoing Call Registration and Charging System
Owners of paired phones
Parallel Phone Interlock (1)
Parallel Phone Interlock (2)
Parallel Phone Lock
Parallel telephone lock on thyristors
PBX is a prefix to the computer
Phone Call Timer
Phone Message Auto-Record Adapter
Pirate phone locker
Power switch with remote control
Prefix for recording telephone conversations (1)
Prefix for recording telephone conversations (2)
Prefix selector for phone
Prefix to telephone for paired lines
Prefix with CLI for radiotelephone and mini PBX
Protection against telephone pirates
Protection of imported telephones
Protection of the telephone
Pulse Stabilizer for a Telephone
Pulse Stabilizer of a Capacitor Power Supply
Radio connection of two faxes
Radiotelephone from a radio station
Radiotelephone from a telephone tube
Receiver-decoder of DTMF signals
Refinement of imported telephones
Refinement of the calling device for phones
Repair imported phone-tube
Repair mobile phone charger
Repair of cordless phones
Repair of imported telephones
Replacing the carbon microphone
Replacing the carbon microphone in your phone
Restoration of the battery of cordless telephones
Schematic diagram of the Ukrtelecomov device
Second call for a phone
Simple Intercom System
Simple Phone
Simple telephone dialing lock
Small intercom
So is it possible to protect the CLI from crashes?
Speakerphone
Speech coding in digital cellular systems
Telemechanics for switching loads by phone
Telephone adapters for auto-recording information
Telephone Amplifier with inductive sensor
Telephone Answering System
Telephone Dialing
Telephone informer
Telephone Interface (1)
Telephone Interface (2)
Telephone interface for a CBS radio station
Telephone Line Controller
Telephone Line Hold Device
Telephone Line Protection
Telephone Line Splitter
The infrared light phone
The principle of telephone cards
The radiotelephone interface for simplex radio stations
The telephone operator
Three options for homemade Anti-CLI
Three phone locks
Three prefixes to telephone sets
Time counter for outgoing telephone conversations
Time counter for telephone conversations
Turning an external device on and off using a modem
TV aerial for a cell phone
Two options for muting the microphone
Two-tone Multi-Frequency (DTMF) AVR Generator
Two-way communication
Using an optocoupler in a telephone call device
VHF Microtransmitter to the telephone
VoIP
We repair the CLI on our own
What is a DECT
Work of one phone with CLI on parallel lines
