There are 32 channels in total. Out of which 31 are voice channels and 1 is signalling channel
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PCM technique
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The voltage regulator is partially built into the alternator and partially controlled by the PCM. It is not available separately through standard retail channels.
THE PCM IS ON THE PSSENGER FIREWALL THE PCM IS ON THE PSSENGER FIREWALL
As we know that voice signal is of frequency 3.3 Khz,and as per the Nyquist Rate or PCM quantization rate for transmission we required signal of >=2f(here 'f' is GIF [3.3]=4).and each sample of data is a byte. DS0: provides one 64kbps channel.E1: 32 DS0 or 32 channels with 64kbps Also we know that voice signal frame consisits of 32 bytes .Hence value of an E1 will be =2x4Khzx8bitsx32slots =2.048Mbps
The PCM will not affect the transmission in your car. The PCM is not related to the transmission in any way.
The specifications on a HPcompaq nc6400 are the following. Intel Centrino Duo processor technology, Intel Core 2 duo processor T5600, 1.83GHz, 2MB L2 cache, 667MHz FSB, Intel Wireless LAN 802.11a/b/g MOW1 mini-PCM-card and bluetooth.
PCM is the Power Control Module The computer)
Power Control Module
Powertrain Control Module ( PCM )
pcm ---------------------------------------------------------------- Powertrain Control Module