| A | B |
|---|
| RBOC | Regional Bell Operating Company |
| CLEC | Competitive Local Exchange Carrier |
| IXC | Interexchange Carrier |
| CO | Central Office |
| CPE | Customer Premise Equipment |
| LOA | Letter of Agency/Authorization |
| PIC | Primary Interexchange Carrier |
| LNP | Local Number Portability |
| DOD | Direct Outward Dial |
| BRI | Basic Rate Interface |
| ISDN | Integrated Services Digital Network |
| PRI | Primary Rate Interface |
| CFB | Call Forward Busy |
| CFRA | Call Forward Remote Access |
| CFDA | Call Forward Don't Answer |
| CWT | Call Waiting |
| CXR | Call Transfer |
| MWI | Message Waiting Indication |
| CNAM | Caller Name & Number/Caller ID |
| LIDB | Line Information Database |
| LAN | Local Area Network |
| GAN | Global Area Network |
| ATM | Asynchronous Transfer Mode |
| ISP | Internet Service Provider |
| TCP | Transmission Control Protocol |
| IP | Internet Protocol |
| DIA | Dedicated Internet Access |
| IA | Integrated Access |
| DSL | Digital Subsciber Line |
| NAT | Network Addess Translation |
| BGP | Border Gateway Protocol |
| VPN | Virtual Private Network |
| SLA | Service Level Agreement |
