---
title: "Cisco Webex - Setting CallTower as the PSTN"
slug: "cisco-webex-setting-calltower-as-the-pstn"
tags: ["calltower", "public"]
updated: 2026-09-18T14:17:10Z
published: 2026-09-18T14:17:10Z
canonical: "learn.calltower.com/cisco-webex-setting-calltower-as-the-pstn"
---

> ## 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.

# Cisco Webex - Setting CallTower as the PSTN

In Control Hub, click on locations

![clipboard_ea044ced9886b926d74f30ce6c83d2984.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_ea044ced9886b926d74f30ce6c83d2984.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Select the location you want to change![clipboard_ea90febd4d1e87902298674ccc74443e1.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_ea90febd4d1e87902298674ccc74443e1.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Click on Calling

![clipboard_e5063fef0a29f3854e2c2afb1f4bb01c5.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_e5063fef0a29f3854e2c2afb1f4bb01c5.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Click manage on PSTN connection

![clipboard_ebcb5cfb574d58b5c38f0e3c6ebdcfd02.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_ebcb5cfb574d58b5c38f0e3c6ebdcfd02.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Click edit next to Connection Type

![clipboard_e0aebceb912df29e7230326573ef0c2d5.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_e0aebceb912df29e7230326573ef0c2d5.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Confirm both statements, then click next

![clipboard_e90b0776ffda04ed62c41209d8fc51012.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_e90b0776ffda04ed62c41209d8fc51012.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Click Cloud Connected PSTN, then click next

![clipboard_e21ea0c05418e5dcf4e2d8e5fe364ad33.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_e21ea0c05418e5dcf4e2d8e5fe364ad33.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Select CallTower from the list of providers, then click next.

![clipboard_ec87586168f327706b59b71490d81bed5.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_ec87586168f327706b59b71490d81bed5.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Select CallTower [OneStream] (US), then click next.

![clipboard_ece49aa6fbb2b5662aeea7e7b41c57090.png](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/clipboard_ece49aa6fbb2b5662aeea7e7b41c57090.png?sv=2026-02-06&spr=https&st=2026-11-04T22%3A30%3A06Z&se=2026-11-04T23%3A30%3A06Z&sr=c&sp=r&sig=nyrfpwxpf4B01OI5YwIDFXTl7C%2Fgu1LWweLJ9QNppaM%3D)

Public Switched Telephone Network, the traditional circuit-switched telephone network used for voice communication.