> 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/telecom-references/protocols/sip-nap-polling.md).

# SIP NAP Polling

### Polling

* In Tmedia, option ["Poll Remote Proxy?"](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/parameters/poll-remote-proxy/README.md) is enabled by default
* Tmedia SIP polling is using SIP OPTIONS method to "poke" a SIP [Network Access Point (NAP)](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/nap/README.md) to see if it's alive or not, that is, [NAP](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/nap/README.md) availability
* Upon a response from the SIP [NAP](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/nap/README.md), Tmedia will determine whether to mark the [NAP](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/nap/README.md) as up
* If the option ["Map any response to available status"](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/parameters/map-any-response-to-available-status/README.md) is unchecked, any 2xx/3xx/4xx class response to a SIP OPTIONS will bring the [NAP](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/nap/README.md) up
* The first time a SIP [NAP](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/nap/README.md) is added in configuration and configuration activated, Tmedia polls at 5 seconds, after that and general use is polling at 60 seconds
  * Since version 3.0.73 NAP SIP MAP polling is configurable with two parameters:
    * Proxy Polling Interval (Default 1 minute)
    * Proxy Polling Response Timeout (Default 30 seconds)

### [Network Access Point (NAP)](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/nap/README.md) Availability

If ["Poll Remote Proxy?"](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/parameters/poll-remote-proxy/README.md) and ["Register to Proxy?"](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/parameters/register-to-proxy/README.md) are both checked, only the SIP OPTIONS answers will affect the [NAP](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/nap/README.md) availability.

### Configuration

* [Allocating a SIP NAP Configuration v3.0](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/configuration/allocating-a-sip-network-access-point-nap/README.md)
* [Allocating a SIP NAP Configuration v2.10](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/configuration/allocating-a-sip-network-access-point-nap/README.md)
* [Allocating a SIP NAP Configuration v2.9](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/configuration/allocating-a-sip-network-access-point-nap/README.md)
* [Allocating a SIP NAP Configuration v2.8](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/configuration/allocating-a-sip-network-access-point-nap/README.md)

\- \[Allocating a SIP NAP Configuration v2.7]\(/tmedia/configuration/allocating-a-sip-network-access-point-nap) - \[Allocating a SIP NAP Configuration v2.6]\(/tmedia/configuration/allocating-a-sip-network-access-point-nap) - \[Allocating a SIP NAP Configuration v2.5]\(/tmedia/configuration/allocating-a-sip-network-access-point-nap)


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