---
title: "CT Cloud Voice Non-Supported Devices"
slug: "ct-cloud-voice-non-supported-devices"
tags: ["calltower", "public"]
updated: 2026-09-18T13:55:59Z
published: 2026-09-18T13:55:59Z
canonical: "learn.calltower.com/ct-cloud-voice-non-supported-devices"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://learn.calltower.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CT Cloud Voice Non-Supported Devices

***INTERNAL ONLY* Business Groups not already using these devices will need to be moved to the Legacy Persistent Profile. Please engage** Metaswitch **Engineering to make this change.**

CallTower will provide CT Cloud Voice SIP account(s) and the following information for devices that are NOT listed on the CT Cloud Voice [**Supported Devices**](/v1/docs/ct-cloud-voice-supported-devices-2) list:

- SIP username
- SIP password
- SIP domain/proxy/registrar
- SIP protocol and port(s) required for successful registration

CallTower cannot provide ongoing support for any device that is not on the [**CT Cloud Voice Supported Devices**](/v1/docs/ct-cloud-voice-supported-devices-2) list; this includes, but is not limited to:

- Device losing registration
- Calls dropping
- Audio issues (one-way audio, poor call quality, etc)
- Device feature(s) not working
- Any other issue that may be outside of the SIP account and other SIP info listed above

Troubleshooting for non-supported devices is limited to validating correct SIP messaging or response from the CT Cloud Voice platform. Once an issue has been determined to be caused by the behavior of a non-supported device, the customer is responsible for pursuing resolution with their hardware vendor.

If additional information is required, please contact your CallTower Account Manager.

A telecommunications platform that provides hosted PBX services, enabling voice and data communication over IP networks.

A telephony service that operates over the internet, allowing users to make and receive calls using cloud technology.

Session Initiation Protocol, is the technology that starts, manages, and ends internet-based phone calls and video meetings between people and devices.

A specific service offering from CallTower that provides cloud-based voice communication solutions.