Cisco Unity : Quick Definition
Cisco Unity provides voice mail and unified messaging capabilities for many thousands of users. Unity can be integrated with the following products: Call Manager SIP Circuit-switched (traditional...
read moreSignaling System 7 – SS7
SS7 is a Common Channel Signaling (CSS) system used in the PSTN that enables functionalities including call control, databases queries, network operations and transactions. Also on SS7 networks, the...
read moreT1/E1 CAS
CAS stands for Common Associated Signaling and the signaling operates by “robbing” the least significant bits of information from voice channels and using this to send clocking and...
read moreISDN (BRI/PRI)
ISDN is a digital transport service that can support both Data and Voice over existing telephone wires. There are 2 types of ISDN: Basic Rate ISDN – BRI : This provides 2 x 64 Kbps bearer...
read moreCAMA : Quick Definition
The Enhanced 911 (E911) system is a separate telephone system from the regular PSTN system. So CAMA is a protocol used to ensure that a call from a particular number is routed to the Public Service...
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