> For the complete documentation index, see [llms.txt](https://docs.spectralink.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.spectralink.net/amie-essentials/applications/ptt.md).

# PTT (Push-to-talk)

![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-45976dbd50ddbb9592de33f147bd6126ea824882%2Fimage157.png?alt=media)

Spectralink Versity smartphones can operate in a group broadcast mode called Push-to-talk (PTT). Complete information about the options offered by SAM can be found in the *Versity Applications Administration Guide*, available online at the Spectralink support site (see Appendix A: Spectralink References). Only a brief summary is provided here.

![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-47fad09399bbe42e32cc05bb3f869c77f446a80e%2Fimage158.png?alt=media)

The administrator can limit or allow access to PTT Volume and Default Channel Settings through the UI State field. See the *Versity Applications Administration Guide* for more information.

UI State is Enabled = User has control

![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-47fad09399bbe42e32cc05bb3f869c77f446a80e%2Fimage158.png?alt=media)

UI State is Disabled = Administrator controls the setting

![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-91c8a757679ea565216937773e28627ca4175604%2Fimage159.png?alt=media)

## *General Settings*

### Enable PTT

PTT must be enabled for it to be activated on the selected handsets.

**Entry criteria**

|               |                                                   |
| ------------- | ------------------------------------------------- |
| **Type**      | Radio button                                      |
| **Default**   | Off                                               |
| **Unique?**   | No                                                |
| **Required?** | No                                                |
| **Level**     | May be set at any level                           |
| **Notes**     | See *Versity* *Applications Administration Guide* |

### Allow PTT transmission when phone is locked

**Entry criteria**

|               |                                                   |
| ------------- | ------------------------------------------------- |
| **Type**      | Radio button                                      |
| **Default**   | Off                                               |
| **Unique?**   | No                                                |
| **Required?** | No                                                |
| **Level**     | May be set at any level                           |
| **Notes**     | See *Versity* *Applications Administration Guide* |

### *Username*

This is the “caller ID” that displays on the broadcast. If nothing is entered, the default is “anonymous”.

**Entry criteria**

|               |                                                 |
| ------------- | ----------------------------------------------- |
| **Type**      | Text field                                      |
| **Default**   | None                                            |
| **Unique?**   | Yes, as labeled by administrator                |
| **Required?** | No                                              |
| **Level**     | Device or Group                                 |
| **Notes**     | See *Versity Applications Administration Guide* |

### *Multicast Address*

Enter the multicast address for broadcast traffic.

The default address is 224.0.1.116 and has been reserved with the Internet Assigned Number Authority in Spectralink’s name.

**Entry criteria**

|               |                                                   |
| ------------- | ------------------------------------------------- |
| **Type**      | Text                                              |
| **Default**   | 224.0.1.116                                       |
| **Unique?**   | No                                                |
| **Required?** | No                                                |
| **Level**     | May be set at any level                           |
| **Notes**     | See *Versity* *Applications Administration Guide* |

### *Codec*

Select either G.711Mu or G.726.

**Entry criteria**

|               |                                                   |
| ------------- | ------------------------------------------------- |
| **Type**      | Dropdown menu                                     |
| **Default**   | G.726                                             |
| **Unique?**   | No                                                |
| **Required?** | Yes                                               |
| **Level**     | Any                                               |
| **Notes**     | See *Versity* *Applications Administration Guide* |

### Default Channel

The default channel is Channel 1. If set to a channel besides Channel 1, the changed channel must be subscribed to for the user’s device. The Default Channel is also user selectable in the PTT settings on the device. If a user changes the default channel to a different subscribed to channel, it will stay at the user’s choice until and unless the administrator changes it in SAM.

**Entry criteria**

|               |                                                   |
| ------------- | ------------------------------------------------- |
| **Type**      | Dropdown menu                                     |
| **Default**   | 1                                                 |
| **Unique?**   | 1 to 25                                           |
| **Required?** | Yes                                               |
| **Level**     | Any                                               |
| **Notes**     | See *Versity* *Applications Administration Guide* |

### PTT Volume

**Entry criteria**

|               |                                                   |
| ------------- | ------------------------------------------------- |
| **Type**      | Slider                                            |
| **Default**   | 20                                                |
| **Unique?**   | 0 to 100                                          |
| **Required?** | Yes for PTT audio                                 |
| **Level**     | Any                                               |
| **Notes**     | See *Versity* *Applications Administration Guide* |

### Channel 1 to Channel 25

Enter the name and subscribe/transmit values for each channel.

**Entry criteria**

|               |                                                                                                                  |
| ------------- | ---------------------------------------------------------------------------------------------------------------- |
| **Type**      | Text field and radio buttons                                                                                     |
| **Default**   | Can Transmit, Subscribe                                                                                          |
| **Unique?**   | Yes, as labeled by administrator                                                                                 |
| **Required?** | No only subscribed channel will display on the device; Channels are receive only unless Can Transmit is enabled. |
| **Level**     | Enterprise, group, device                                                                                        |
| **Notes**     | See *Versity* *Applications Administration Guide*                                                                |

{% hint style="info" %}
**Channel label length**

You can enter a label with more than 15 characters, but a long label will be truncated when it displays on the handset.
{% endhint %}

**Channel can transmit**

When the check box is checked, this channel is permitted to transmit.

By default, Can Transmit is checked only on channel 1.

**Channel subscription**

A user must be subscribed to a channel to receive broadcasts.


---

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