> 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/tmedia-documentation/configuration/web-portal-3-3/protocol-stack/h-248-megaco/h-248-service-affecting-parameters.md).

# H.248 Service Affecting Parameters

> **Applies to:** Tmedia 3.0, 3.2, 3.3

### Service Affecting Parameters

When modifying the following parameters, the H.248 stack will be deallocated and reallocated, resulting in a loss of active calls. Be careful when changing these parameters:

![Edit H248 0](https://docs.telcobridges.com/w/images/9/94/Edit_H248_0.png)

* Transport Protocol
  * [Transport Protocol Type](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#t)
  * [Public IP Address](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/system#p)
  * [Use IP interface](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#u)
  * [Local IP Address](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#l)
  * [Local Port to Receive for Text Encoding](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#l)
  * [IP ToS value](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#i)
* Advanced Parameters
  * [Maximum Number of TDM Terminations](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#m)
  * [Maximum Number of Ephemeral Terminations](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#m)
  * [Default MEGACO version](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#d)
  * [Maximum Number of DNS Pending Requests](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#m)
  * [Ephemeral Termination Identifier Root](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#e)
  * [Ephemeral Termination Identifier Maximum Value](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#e)
  * [Number of Worker Threads](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#n)
* Profile
  * [Enabled](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sip#e)
  * [Profile Name](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#p)
  * [Profile Version](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#p)
* Timers
  * [Dialing Start Timer Value](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#d)
  * [Dialing Short Timer Value](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#d)
  * [Dialing Long Timer Value](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#d)
  * [Dialing Duration Timer Value](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#d)
  * [Restart Timer Value to Retry Controller Association](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#r)
  * [Local Response Timer Value](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#l)
  * [Inactivity Timer Value](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/h248-mgcp#i)


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