| APN |
Access Point Name |
| ACD |
Automatic Call Distribution |
| CC |
Country Codes |
| CLIP |
Calling Line Identification Presentation |
| CLIR |
Calling Line Identification Restriction |
| CS |
Circuit Switched |
| DSCP |
Differentiated Services Code Point |
| FMC |
Fixed-Mobile Convergence |
| HTTP |
Hypertext Transfer Protocol |
| HTTPS |
Hypertext Transfer Protocol Secure Sockets |
| IM&P |
Instant Messaging and Presence |
| IP |
Internet Protocol |
| NAT |
Network Address Translation |
| PBX |
Private Branch Exchange |
| PIN |
Personal Identification Number |
| QoS |
Quality of Service |
| RCS |
Rich Communication Suite RTCP Real-Time Control Protocol SBC Session Border Controller |
| SIM |
Subscriber Identity Module |
| SIP |
Session Initiation Protocol |
| TN |
Telephone Number |
| ToS |
Type of Service |
| UC |
Unified Communications |
| UI |
User Interface |
| URI |
Uniform Resource Identifier |
| URL |
Uniform Resource Locator |
| VM |
Voice Mail |
| VoIP |
Voice Over IP |
| VPN |
Virtual Private Network |
| XMPP |
Extensible Messaging and Presence Protocol |
| XR |
Extended Reports |
| Xsi |
Xtended Services Interface |
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