> 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/vqo.md). # VQO ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-fbba6da42aa284957944acb73019a9c73aa5fb21%2Fimage177.png?alt=media) Voice Quality Optimization (VQO) is primarily done automatically in the Versity phone, but some adjustments can be made through the VQO app. ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-ea45c33ce1e437643d806562eb2b96392a5ffd80%2Fimage178.png?alt=media) ### Wi-Fi Low RSSI Threshold Voice quality can degrade if the Wi-Fi signal is too weak. The Received Signal Strength Indicator (RSSI) will change as the user moves toward or away from the connected AP. The Wi-Fi Low RSSI threshold setting is the RSSI level at or below which the device seeks a better AP. The device uses many attributes of an AP to determine if it is a good candidate, including the current load on the AP, the available bandwidth on the AP, and the channel it’s using. Sometimes the best AP may have an RSSI value lower than other candidates. {% hint style="warning" %} Do not change the RSSI threshold value unless instructed to do so by Spectralink service personnel. {% endhint %} **Entry criteria** | | | | ------------- | ------------------------------------------------------------------------------- | | **Type** | Slider -100 to -55 | | **Default** | -67 (Do not change unless instructed to do so by Spectralink service personnel) | | **Unique?** | No | | **Required?** | No | | **Level** | Do not change unless instructed to do so by Spectralink service personnel | | **Notes** | See above | ## Channel Selection ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-8610f0e474852dbc0a96738644059f9a149a3ffd%2Fimage179.png?alt=media) ### Wi-Fi Band Selection {% hint style="warning" %} **Make sure you have the correct channel selections!** Wrong selection of channels could lead to phones being permanently disconnected from the network. If this happens, affected devices would need to be recovered manually, through restoring factory defaults. Contact Spectralink support if incorrect band selection disables your smartphones. {% endhint %} ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-5a00274c72309a07df1dd3c1c9c98acc961870a3%2Fimage180.png?alt=media) #### Auto band selection When Auto is Enabled, all bands (2.4 GHz, 5 GHz, and 6 GHz) and all available Wi-Fi channels are enabled, and you cannot make Band or Channel selection. When Auto is Disabled, you can select which band to enable and select specific channels within each band. All bands are enabled by default, but channels can be disabled. {% hint style="warning" %} **Phones will malfunction if all active channels are disabled!** Disabling channels can result in the loss of network connectivity for each affected device, requiring them to be reset to factory defaults. Review the channels in use at the intended location before making changes. {% endhint %} Entry criteria for all Wi-Fi band selections | | | | ------------- | ----------------------------------------------- | | **Type** | Radio button | | **Default** | Enabled | | **Unique?** | No | | **Required?** | See above | | **Level** | Enterprise usually, but may be set at any level | | **Notes** | See above | #### 2.4 GHz Wi-Fi Band Enable specific channels within 2.4 GHz band below. #### 5 GHz Wi-Fi Band Enable specific channels within 5 GHz subbands below. #### 6 GHz Wi-Fi Band *For Versity 97 Series phones only*\ *Enable specific channels within 6 GHz subbands below.* ### 2.4 GHz: Channels 1-13 ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-634803690a0f82ff8f664a6737cba7979ae2cdd3%2Fimage181.png?alt=media) #### Ch1 to Ch 13 **Entry criteria** | | | | ------------- | ------------------------------------------------- | | **Type** | Radio button | | **Default** | On | | **Unique?** | No | | **Required?** | No | | **Level** | Enterprise | | **Notes** | See *Versity* *Applications Administration Guide* | ### 5 GHz U-NII bands ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-b65e5b81ecbfe6215630a8d8c6a02448b7a88e81%2Fimage182.png?alt=media) ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-ababd84b13a28c5f4f831437672d8efd1d5014f4%2Fimage183.png?alt=media) ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-90a50faf18852ae9264ca1e0964d4a60550e5a89%2Fimage184.png?alt=media) ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-e89baca8490d78f948c2ddabfedc442e6d3abc2d%2Fimage185.png?alt=media) ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-59575baa3436d59a8d8e57b680b741479c06873f%2Fimage186.png?alt=media) **Entry criteria** | | | | ------------- | ------------------------------------------------- | | **Type** | Radio button | | **Default** | On | | **Unique?** | No | | **Required?** | No | | **Level** | Enterprise | | **Notes** | See *Versity* *Applications Administration Guide* | ### 6 GHz U-NII bands *For Versity 97 Series phones only* ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-3b6b084f2294e0a9727dea0c3518944ac5003f00%2Fimage188.png?alt=media) ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-425e984a23c03d6a2b6cbdde546f935658807a1e%2Fimage189.png?alt=media) ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-536fd374a2cb1cb2efc66e92caf018549f392f24%2Fimage190.png?alt=media) ![](https://3032864282-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxfLF6IpyutR429bMnvvf%2Fuploads%2Fgit-blob-190224edef90d2f1cb6a7ce2e4aad9c2c1b88c3d%2Fimage191.png?alt=media) ## Wi-Fi Preferences ### About FT and CCKM {% hint style="info" %} **Regarding Android 8 phones and FT and CCKM settings** Versity 95/96 series phones running Android 8 (1.x Versity releases) may experience a 5-10 second disconnect from Wi-Fi when FT and CCKM configuration settings are received from SAM (or an EMM). This disconnect will occur regardless of the setting values. *Workaround:* Upgrade your phones to Android 10 (Versity 2.x). If you cannot upgrade to Android 10, it is recommended that you avoid pushing these 2 settings unnecessarily, to minimize these disconnects. Avoid using the *Re-apply Config* setting from the SAM device list, which will push all the settings to a device regardless of setting changes. Instead use *Save Configuration* and *Send Configuration Now* in SAM, which will only send application settings that have changed. {% endhint %} {% hint style="info" %} **Reboot required** A reboot is required after making a change to VQO’s FT or CCKM settings. {% endhint %} Time-sensitive applications such as wireless Voice over IP (VoIP) can be supported by access points that use FT and CCKM technology. Both are enabled by default in the phone. #### FT Fast Basic Service Set Transition (FT) can be enabled on access points and, if used, should be enabled here. FT allows clients to roam between APs without taking the time to re-authenticate to each new AP. #### CCKM CCKM (Cisco Centralized Key Management) fast secure roaming can be enabled on access points and can also be enabled here. CCKM uses a fast rekeying technique that enables Cisco client devices to roam from one access point to another typically in under 150 milliseconds (ms). CCKM fast secure roaming ensures that there is no perceptible delay in time-sensitive applications such as wireless Voice over IP (VoIP). Contact your Spectralink service representative if you have any questions. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. 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