> 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/sip-and-voip/sip/sip-nap-polling.md).
# SIP NAP Polling
### Polling
* In Tmedia, option ["Poll Remote Proxy?"](/telecom-references/parameter-reference/sip.md#p) is enabled by default
* Tmedia SIP polling is using SIP OPTIONS method to "poke" a SIP [Network Access Point (NAP)](/telecom-references/sip-and-voip/sip/nap.md) to see if it's alive or not, that is, [NAP](/telecom-references/sip-and-voip/sip/nap.md) availability
* Upon a response from the SIP [NAP](/telecom-references/sip-and-voip/sip/nap.md), Tmedia will determine whether to mark the [NAP](/telecom-references/sip-and-voip/sip/nap.md) as up
* If the option ["Map any response to available status"](/telecom-references/parameter-reference/sip.md#m) is unchecked, any 2xx/3xx/4xx class response to a SIP OPTIONS will bring the [NAP](/telecom-references/sip-and-voip/sip/nap.md) up
* The first time a SIP [NAP](/telecom-references/sip-and-voip/sip/nap.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)](/telecom-references/sip-and-voip/sip/nap.md) Availability
If ["Poll Remote Proxy?"](/telecom-references/parameter-reference/sip.md#p) and ["Register to Proxy?"](/telecom-references/parameter-reference/sip.md#r) are both checked, only the SIP OPTIONS answers will affect the [NAP](/telecom-references/sip-and-voip/sip/nap.md) availability.
### Configuration
* [Allocating a SIP NAP Configuration v3.0](https://prosbcdocs.telcobridges.com/tmedia-documentation/other-pages/protocol-stacks-general/tmedia-tdev-and-tsig-web-portal-3-0-protocol-stacks#sip)
Click here for other versions
* [Allocating a SIP NAP Configuration v2.10](https://prosbcdocs.telcobridges.com/tmedia-documentation/configuration/web-portal-previous/web-portal-2-10/tmedia-tdev-and-tsig-web-portal-2-10-protocol-stacks#sip)
* [Allocating a SIP NAP Configuration v2.9](https://prosbcdocs.telcobridges.com/tmedia-documentation/configuration/web-portal-previous/web-portal-2-9/web-portal-2-9-protocol-stacks#sip)
* Allocating a SIP NAP Configuration v2.8 and earlier: documentation is no longer published. Contact [technical support](https://prosbcdocs.telcobridges.com/tmedia-documentation/operations-and-support/support/contacting-telcobridges-technical-support) if you need it.
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