Antique Telephone
The essential elements of a microphone by telephone (transmitter) in which they talk earphone (receiver) power and answer in a distant location. [1] In addition, most phone ringtone to announce an incoming call with the keypad to dial a number or enter into when initiating a phone call to another phone. Integrated into the mobile phone transmitter and receiver are nearly everything by ear and held his hand to his mouth in a conversation.
Replacing the cover on a candlestick phone.
February: It's winter time with the thought of staying indoors and working on some telephone projects. Often, collectors come to a desk with candlesticks, where the base cover is missing, broken or just needs to be replaced. Black phones can be found with a dark brown-like cloth, while some of the older phones can be found with deer leather cover. Nickel plated phones can be found with brown coated bases and early green coated phones. Collectors like to use felt coatings from old pool tables or deer skin. For the purpose of this blog, I found an old leather jacket at the Goodwill store, as mentioned in the September blog below.
Today we recovered the base of a Western Electric 20AL manual candlestick with a piece of leather in the jacket. The motherboard was removed from the phone and the retaining ring was removed so that the old material could be removed. To put the material on the base, we cut a template on a piece of scrap metal using a dremel and router as shown in the image below:
vintage | anttique telephone in india | Handicrafts Antique by on amazon
Arsh Handicrafts Antique - Telephone Maharaja Style Telephone Home Décor Vintage Items
- Package content : One telephone Color :Brown, Material : Wood shisham Size - 25.4 x 16.5 x 27.9 cm
- Antique Gifting Idea: On The Occasion Of Diwali, Christmas, Anniversary, Birthdays These Items Can Be Readily Turned Into A Wonderful Gift Item.
Scrafts SCP031A Grand Luxury Traditional Vintage Look Classic
Scrafts Grand Luxury Traditional Vintage Look Classic Wooden with Old Fashioned Rotatory Dial Antique Landline Phone
1.Size: L=11in B=11in H=12in
2.Rotary dial, No External Power Supply, No Batteries Required, Working Directly with a current Telephone Line
FunkyTradition Blue Golden Vintage Style Telephone Table Lamp with Alarm Clock for Christmas, Anniversary, Birthday Gift, Home and Office Decor
1.Most Attractive Telephone Lamp to Glorify the look of your home.
2.It looks very attractive and Eye Catching.Its Unique design makes it look like a Antique.
3.Best for Anniversary, Christmas, Diwali, Birthday Gift and also for Home and Office Decor.
some more info about telephone
The first telephones were directly connected to each other from one customer's office or residence to another customer's location. These systems were quickly replaced by switchboards located in manual operation centers, being impractical beyond some customers. These exchanges soon connected to each other, eventually leading to the creation of an automated public switched telephone network worldwide. For increased mobility, various radio systems were developed for transmission between mobile stations on ships and cars in the mid-20th century. Handheld mobile phones were introduced in 1973 for personal service. In later decades, their analog cellular system evolved into digital networks with high capacity and low cost.
Convergence has provided most modern mobile phones with a capacity far beyond simple voice conversation. Most are smartphones, all integrating mobile communication and multiple computing needs.
Convergence has provided most modern mobile phones with a capacity far beyond simple voice conversation. Most are smartphones, all integrating mobile communication and multiple computing needs.
Landlines have a switch (A4) and an alerting device, usually a buzzer (A7), which remains connected to the phone line as long as the phone is "on-hook" (that is, the switch (A4) is open) and other components when the phone is connected to the "off hook". Off-hook components include a transmitter (microphone, A2), a receiver (speaker, A1), and dialing, filtering (A3), and other amplification circuitry.
Instead of a telephone call, the caller lifts the telephone receiver, operating a lever that closes the on-hook switch (A4). This transmission powers the phone by connecting the hybrid transformer, as well as the transmitter (microphone) and receiver (speaker) to the line. In this off-hook condition, telephone circuits typically have a resistance of less than 300 ohms, causing direct current (DC) to flow from the telephone exchange to line (C). The control panel detects this current, connects a digit receiver circuit to the line, and sends a dial tone to indicate ready. In modern button phones, the caller presses the number keys to send the destination's phone number, called a match. The key controls a tone generator circuit (not shown) that sends DTMF tones to the control panel. A rotary dial phone uses pulse dialing, sending out electrical pulses, so that the control panel decodes each digit of the phone number. If the caller's line is available, the terminating exchange applies an intermittent alternating current (AC) ring signal of 40 to 90 volts to alert the incoming call. However, if the called party's line is in use, the exchange sends a reverse signal to the calling party. If the called party is in use but subscribes to a waiting service call, the control panel sends an intermittent audible tone to indicate another call to call.
The electromechanical ring of a telephone (A7) is connected to the line through a capacitor (A6), which blocks the direct current and passes the alternating current of the call power. The phone does not draw current when on-hook, while a DC voltage is continuously applied to the line. The exchange circuit (D2) can send an alternating current through the line to activate the doorbell and announce incoming calls. In manual service exchange areas, prior to establishing dial-up service, telephones had hand-cranked generators to return a ringing voltage to the exchange or another telephone on the same line. When a landline telephone is idle (on-hook), the circuitry of the telephone exchange indicates the absence of direct current to detect that the line is not in use. [2] When a party initiates a call on this line, the exchange sends a call signal. When the called side picks up the handset, it activates a dual circuit breaker hook (not shown) that can simultaneously disconnect the alerting device and connect the audio circuit to the line. This, in turn, draws direct current through the line, confirming that the so-called telephone is now active. The panel circuit turns off the ring signal and both phones are now active and connected through the panel. Holidays can celebrate as long as both phones are off. When a participant hangs up, placing the handset on a base or hook, the direct current on that line is turned off, indicating to the control panel to disconnect the call.
Calls to parties beyond the local exchange are made on trunks that establish links between the exchanges. In modern telephone networks, fiber optic cables and digital technology are often used for such connections. Satellite technology can be used for communication over very long distances.
On most landlines, the transmitter and receiver (microphone and speaker) are located on the handset, although on a speakerphone these components may be located on a base or in a separate box. Driven by the line, the microphone (A2) generates an electric current that changes its frequency and amplitude in response to sound waves. The resulting current is transmitted along the telephone line to the local exchange, then to another telephone (through the local exchange or through a larger network), where it passes through the receiver coil (A3). The varying current in the coil produces a uniform speed of the receiver diaphragm, which reproduces the original sound waves present in the transmitter.
Instead of a telephone call, the caller lifts the telephone receiver, operating a lever that closes the on-hook switch (A4). This transmission powers the phone by connecting the hybrid transformer, as well as the transmitter (microphone) and receiver (speaker) to the line. In this off-hook condition, telephone circuits typically have a resistance of less than 300 ohms, causing direct current (DC) to flow from the telephone exchange to line (C). The control panel detects this current, connects a digit receiver circuit to the line, and sends a dial tone to indicate ready. In modern button phones, the caller presses the number keys to send the destination's phone number, called a match. The key controls a tone generator circuit (not shown) that sends DTMF tones to the control panel. A rotary dial phone uses pulse dialing, sending out electrical pulses, so that the control panel decodes each digit of the phone number. If the caller's line is available, the terminating exchange applies an intermittent alternating current (AC) ring signal of 40 to 90 volts to alert the incoming call. However, if the called party's line is in use, the exchange sends a reverse signal to the calling party. If the called party is in use but subscribes to a waiting service call, the control panel sends an intermittent audible tone to indicate another call to call.
The electromechanical ring of a telephone (A7) is connected to the line through a capacitor (A6), which blocks the direct current and passes the alternating current of the call power. The phone does not draw current when on-hook, while a DC voltage is continuously applied to the line. The exchange circuit (D2) can send an alternating current through the line to activate the doorbell and announce incoming calls. In manual service exchange areas, prior to establishing dial-up service, telephones had hand-cranked generators to return a ringing voltage to the exchange or another telephone on the same line. When a landline telephone is idle (on-hook), the circuitry of the telephone exchange indicates the absence of direct current to detect that the line is not in use. [2] When a party initiates a call on this line, the exchange sends a call signal. When the called side picks up the handset, it activates a dual circuit breaker hook (not shown) that can simultaneously disconnect the alerting device and connect the audio circuit to the line. This, in turn, draws direct current through the line, confirming that the so-called telephone is now active. The panel circuit turns off the ring signal and both phones are now active and connected through the panel. Holidays can celebrate as long as both phones are off. When a participant hangs up, placing the handset on a base or hook, the direct current on that line is turned off, indicating to the control panel to disconnect the call.
Calls to parties beyond the local exchange are made on trunks that establish links between the exchanges. In modern telephone networks, fiber optic cables and digital technology are often used for such connections. Satellite technology can be used for communication over very long distances.
On most landlines, the transmitter and receiver (microphone and speaker) are located on the handset, although on a speakerphone these components may be located on a base or in a separate box. Driven by the line, the microphone (A2) generates an electric current that changes its frequency and amplitude in response to sound waves. The resulting current is transmitted along the telephone line to the local exchange, then to another telephone (through the local exchange or through a larger network), where it passes through the receiver coil (A3). The varying current in the coil produces a uniform speed of the receiver diaphragm, which reproduces the original sound waves present in the transmitter.
No comments:
Post a Comment