10-04-2017, 09:36 PM
calling number identification using calculator circuit diagram pdf
1. CALLING NUMBER IDENTIFICATION USING CALCULATOR
Description: Dial-up users need to install the resurgence Caller ID client software; The user needs to be opened in the local switch busy transfer business; Access servers need to have a caller identification service; Called user receives the information of the gatekeeper, the client automatically pop up a dialog box prompts the user to have telephone access, and access user phone numbers, by the user to decide whether to answer the call; Called the user clicks on the pop-up dialog box client Answer button to turn on the call, otherwise click reject button, and then hang up the call; Calling or called to complete the call, hang up, disconnect the telephone channel.
2. OPTICAL REMOTE SWITCH
Description: The plastic optical fiber cables and POF (Plastic Optical Fiber) are ideal for transmitting digital data and therefore also for the creation of IP-based Ethernet networks.
The main advantages of plastic fibers POF are the speed of data transmission is now more than 100 Mbits / sec, the small size of fiber cables and their handling, galvanic isolation provided by the plastic fiber, also has many other advantages compared with traditional RJ45 cable and glass optical fiber are described below.
With fiber-plastic guaranteed speed is 100 Mbits / sec and the cable is laid quickly, is small and the operation is guaranteed as plastic fiber tolerate misalignment between optical fiber and transmitter / receiver optics.
E immune to electromagnetic interference and is not a source of electromagnetic interference to other electronic equipment, nor is it sucettibile.
Transmits signals up to 100 meters without repeaters, and can enter in the existing channels, including electricity, because it is made of insulating material.
The advantages of plastic fiber applied to Ethernet and IP in both residential and industrial are:
Data transmission rate: 100 Mbits / sec in all conditions up to 100 meters
Simplicity: the end of the cable takes less than 10 seconds and is done with simple accessories and, since the plastic fiber tolerate the misalignment of the connectors, the operation is guaranteed el it is extremely simple installation can be done by anyone.
Small size cables: thanks to its typical diameter of 2.2 mm plastic fiber cable also passes electrical clogged gutters in eliminating the need to lay new ducts and thus reducing installation costs. It is therefore ideal for buildings where there are no channels dedicated to data transmission cables.
Compliance with regulations: being made of insulating material, plastic fiber can also pass in the electrical conduit in compliance with Law 46/90.
Immediate verification of operation: through the use of visible light are not testers or other instruments, just check that the light comes out by the POF cable.
Immune to interference and the noise generated by power cables, antennas and the neon is very suitable for building networks that require a high quality of communication such as IPTV and multimedia networking.
Security: Unlike glass optical fiber, which works with infrared light dangerous to the human eye, the plastic fiber works with visible light and, unlike copper, does not emit electromagnetic radiation, nor is it likely.
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