Loading coil

Fig. 3.19. Typical load coil spacing.

Almost all loops are loading with 88mH load coils. It results in a cutoff frequency of around 3800 Hz. Hence 88 mH coil loaded loops effectively pass signals above 3800 Hz. The loading coils are represented for example, as 19H88, 19 indicate the gauge size, H indicates the spacing of the coils and 88 indicate the inductance of the coils. For large volumes of data and high frequency transmission, special facilities and/or conditioned (introduction of amplifiers and equalizer) local loop will be leased. Also, it should be regenerated every 1.6 to 4.8 km depending on speed of transmission and volume of data are to transmitted. The quality of reception at the subscriber end is tested by a rating system standardised by CCITT.

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DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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