A company’s telephone exchange (PBX or hosted IP-PBX) digitizes telephone channels at 8000 smp/s,...

Question

A company’s telephone exchange (PBX or hosted IP-PBX) digitizes telephone channels at 8000 smp/s, using 8 bits for quantization. The telephone exchange transmits simultaneously on 24 telephone channels over the same communications link.

a. What’s the required per channel data rate?

b. What is the combined data rate for the 24 channels over the communications link?

c. In order to provide voice-mail service, the telephone exchange can store three minute audio messages using the same digitizing process used for a telephone channel. How many megabytes of data storage space are needed to store a three minute voice-mail message?

Prince · Accepted Answer

Sheet1
	Particular	Amount
	Part a. 
	Calculation of Required per channel data rate:
	No. of Channels	24
	No. of Digitizes telephone	8000
	No. of Bits for quantization	8
	Required per channel data rate	1,536,000.00
	Part b. 
	Combined data rate for the 24 channels
	No. of Channels	24
	No.

A company’s telephone exchange (PBX or hosted IP-PBX) digitizes telephone channels at 8000 smp/s, using 8 bits for quantization. The telephone exchange transmits simultaneously on 24 telephone...

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