# Appendix A: Glossary

- [Glossary: Call Detail Records (CDR)](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-call-detail-records-cdr.md)
- [Glossary: Call routing](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-call-routing.md): Call routing refers to the ability to route calls based on criteria such as origin, destination, time of day, service provider rates, etc.
- [Glossary: DNS](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-dns.md)
- [Glossary: Mean Opinion Score (MOS)](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-mean-opinion-score-mos.md): Mean Opinion Score, more commonly known as MOS, is a voice call quality metric that ranges from 5 (excellent) to 1 (bad). It is a subjective method of quality assessment.
- [Glossary: NAP](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-nap.md): A Network Access Point or NAP represents the entry point to another network or destination peer (e.g. SIP proxy, ISUP interface peer, etc). A NAP can also be thought of as a trunk group.
- [Glossary: RADIUS](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-radius.md)
- [Glossary: Ringback tones](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-ringback-tones.md)
- [Glossary: SAP](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-sap.md)
- [Glossary: Signaling protocols](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-signaling-protocols.md): Signaling refers to the system of messages required to set up and tear down telephone calls between the calling and the called parties.
- [Glossary: SIP](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-sip.md)
- [Glossary: Route retry](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-sip/glossary-route-retry.md)
- [Glossary: SIGTRAN](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-sip/glossary-sigtran.md)
- [Glossary: SIP-I/SIP-T](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-sip/glossary-sip-i-sip-t.md)
- [Glossary: SIP gateway](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-sip/glossary-sip-gateway.md)
- [Glossary: SIP Registration](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-sip/glossary-sip-registration.md)
- [Glossary: Softswitch](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-softswitch.md)
- [Glossary: Toolpack](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack.md)
- [Glossary: Web server](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack/glossary-web-server.md)
- [Glossary: tboamapp](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack/glossary-tboamapp.md)
- [Glossary: Tbtoolpack Service](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack/glossary-tboamapp/glossary-tbtoolpack-service.md)
- [System Id](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack/glossary-tboamapp/glossary-tbtoolpack-service/system-id.md)
- [Gateway Port](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack/glossary-tboamapp/glossary-tbtoolpack-service/system-id/gateway-port.md)
- [Primary/Secondary](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack/glossary-tboamapp/primary-secondary.md)
- [Master/Slave](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack/glossary-tboamapp/master-slave.md)
- [Active/Standby](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-toolpack/glossary-tboamapp/master-slave/active-standby.md)
- [Glossary: Unified communications](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-unified-communications.md)
- [Glossary: Web Portal](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-web-portal.md)
- [Glossary: DTMF Relay](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-dtmf-relay.md)


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