21CN key technologies

Technologies and protocols are fundamental to the transport of voice, data and video and the management and control of a customer’s communication session across any communications network.  A number of key technologies and protocols are associated with 21CN and here we see how they are employed to carry calls across 21CN’s strategic domains:

But what do these technologies and protocols actually do?  Here’s a brief non-technical insight into their functions:

• Internet Protocol Multi-media Sub-system (IMS)

• Internet Protocol  (IP)

• Multi-Protocol Label Switching (MPLS)

• Synchronous Digital Hierarchy (SDH)

• Session Initiation Protocol (SIP)

• Virtual Local Area Network (VLAN)

• Wave Division Multiplexing (WDM)