Fig. 7.6. (a) 30 channel PCM system, (b) Multiframing.

The 8 bits of channel 16 are shared between the 30 channels by a process of multiframing. 16 successive appearances of channel 16 form a multiframe of 8 bit time slots. Frame 0 contains a multiframe alignment signal. Frame 1 to 16 of Fig. 7.6 (b) contains four bits of signalling infomation for each of 2 channels. This arrangement enables a much larger number of signals to be exchanged.

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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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