Nortel Networks COMMUNICATION SERVER 1000 NN43021-110 - Manual (Page 43)

Hardware architecture 43
Figure 16
Eight segments per superloop
Intelligent Peripheral Equipment
Using pulse code modulation (PCM), Intelligent Peripheral Equipment
(IPE) converts analog signals to digital signals before switching is
performed by the network. This conversion method samples the
amplitude of the analog signal at a rate of twice the highest signal
frequency, then converts the amplitude into a series of coded pulses. For
telecommunications, the PCM-sampling frequency standard is 8 kHz.
Compressing-expanding (companding) PCM is a standard technique
for using 8-bit words to efficiently represent the range of voice and data
signals. Two standards for companding, A-Law and µ-Law, are recognized
worldwide. IPE conforms to both standards; the standard required is
selected through software.
Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Large System Overview
NN43021-110 02.05 Standard
30 September 2008
Copyright © 2003-2008 Nortel Networks
.