> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/appendices/appendix-a-glossary/glossary-nap.md).

# Glossary: NAP

A Network Access Point (NAP) is the entry point to another network or destination peer, such as a SIP proxy. Think of it as a trunk group.

### TelcoBridges and Network Access Points

The Network Access Point (NAP) allows for [service access points (SAPs)](/appendices/appendix-a-glossary/glossary-sap.md), [ISDN](/hidden-pages/glossary-isdn.md) stacks, and SS7 ISUP interfaces to be associated as a combined resource for one type of access. A NAP is used to represent a collection of voice endpoints, for example: a group of SS7 CICs, ISDN controlled timeslots, [SIP](/configuration-details/configuration-by-web-portal-category/sip.md) outgoing proxy to a specific provider, and more. NAPs are, later in the configuration process, used to define how calls are routed out of the Tmedia system.

### NAP Types

* SS7 (Signaling System 7)
* ISDN (Integrated Systems Digital Network)
* CAS (Channel associated signaling)
* SIP (Session Initiation Protocol)
* VOIP (Voice Over IP)
* TDM (Time-Division Multiplexing)
* Media-only (VoIP or TDM) for H248 controlled resources


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