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Q: what is the DM
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User: what is the DM

User: what is the DM ?

User: what is the delta modulation ?

User: what is the ss7 system ?

User: what is PSTN ?

Question
Asked 10/15/2009 7:05:46 AM
Updated 12/8/2014 3:55:19 AM
4 Answers/Comments
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Delta modulation is an analog-to-digital and digital-to-analog signal conversion technique used for transmission of voice information where quality is not of primary importance.


Added 12/8/2014 3:51:43 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [12/8/2014 4:12:50 AM], Rated good by jeifunk
0
The public switched telephone network (PSTN) is the aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication.


Added 12/8/2014 3:55:02 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [12/8/2014 4:13:53 AM]
0
On the public switched telephone network (PSTN), Signaling System 7 (SS7) is a system that puts the information required to set up and manage telephone calls in a separate network rather than within the same network that the telephone call is made on.


Added 12/8/2014 3:55:19 AM
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