ACB     Automatic Callback 

API     Application Programming Interface 

CPU     Central Processing Unit 

DTMF     Dual-tone multi-frequency 

EULA     End-User License Agreement 

FAC     Feature Access Code 

FAQ     Frequently Asked Question 

FMC     Fixed-mobile convergence 

HD     High Definition 

HID     Human Interface Device 

LDAP     Lightweight Directory Access Protocol 

LGPL     Lesser General Public License 

MWI     Message Waiting Indication 

RAM     Random Access Memory 

SIP     Session Initiation Protocol 

UC     Unified Communications 

UI     User Interface 

URL     Uniform Resource Locator 

VoIP     Voice over IP 

WebRTC     Web Real-Time Communication 

Xsi     Xtended Services Interface 

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