Softswitch: Architecture for VoIP

The Glossary is based on the "Reference Architecture" document by International Softswitch Consortium 2002.
| 3G | Third generation |
| 3GPP | 3G Partnership Project (UMTS) |
| AAA | Authentication, authorization, and accounting (IETF) |
| A-F | (Call) accounting function (ISC) |
| ACELP | Algebraic Code-Excited Linear Prediction |
| ADPCM | Adaptive Differential Pulse-Code Modulation |
| ADSL | Asymmetric Digital Subscriber Line |
| AF | Assured forwarding |
| AG | Access gateway |
| AGS-F | Access Gateway Signaling Function (ISC) |
| AIN | Advanced Intelligent Network |
| AN | Access Network |
| ANSI | American National Standards Institute |
| API | Application programming interface |
| AS | Application server |
| AS-F | Application server function (ISC) |
| ASN.1 | Abstract Syntax Notation 1 |
| ATM | Asynchronous Transfer Mode |
| ATU-R | ADSL Terminal Unit-Remote |
| AuC | Authentication center (GSM) |
| BG | Border gateway |
| BGP | Border Gateway Protocol |
| BICC | Bearer Independent Call Control (ITU Q.1901) |
| BSSAP | Base Station Subsystem Application Part (GSM, 3GPP) |
| CA | Call agent |
| CA-F | Call Agent Function (ISC) |
| CAMEL | Customized Applications for Mobile Network Enhanced Logic (GSM) |
| CAP | CAMEL Application Part (GSM, 3GPP) |
| CAS | Channel Associated Signaling |
| CATV | Cable television |
| CBR | Constant bit rate |
| CBR | Content-based routing |
| CCS | Common Channel Signaling |
| CDMA | Code Division Multiple Access |
| CDR | Call Detail Record |
| CELP | Code-Excited Linear Prediction |
| CIC | Circuit Identification Code |
| CLEC | Competitive Local Exchange Carrier |
| CLI | Common Language Infrastructure |
| CM | Cable modem |
| CMTS | Cable Modem Termination System (DOCSIS, PacketCable) |
| COPS | Common Open Policy Protocol (IEFT RFC 2748) |
| CPE | Customer premise equipment |
| CPL | Call-Processing Language |
| DiffServ | Differentiated Services |
| DNS | Domain name system |
| DOCSIS | Data Over Cable System Interface Specification |
| DPC | Destination point code |
| DQoS | Dynamic quality of service |
| DSL | Digital subscriber line |
| DSLAM | DSL access multiplexer |
| DSP | Digital signal processor |