---
title: "Adjust Local SIP Ports"
slug: "adjust-local-sip-ports"
updated: 2026-05-17T17:28:31Z
published: 2026-05-21T21:27:32Z
canonical: "help.8x8.com/adjust-local-sip-ports"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.8x8.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Adjust Local SIP Ports

## Objective

Adjusting local SIP ports.

## Applies To

- Poly Devices
- Yealink Devices

## Procedure

Adjusting local SIP ports is commonly done when disabling Strict Register on a Fortigate router to resolve NAT configuration issues. Adjusting local SIP ports can be completed as a **last resort** if a device is causing duplicate ports or port shuffling or when [Troubleshooting Ghost Calls](/support/docs/troubleshooting-ghost-calls). If the local SIP ports are being adjusted, it needs to be completed for all phones on the same network.

### Poly Phones

1. In a browser on a computer on the same network as the phone, navigate to phone’s local IP address. You will need to enter https:// followed by the IP address.
2. Log in as *Admin* and enter the phone's MAC password.
3. Click **Settings**.![](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/10151?sv=2026-02-06&spr=https&st=2026-11-03T23%3A20%3A38Z&se=2026-11-04T00%3A20%3A38Z&sr=c&sp=r&sig=w%2FY%2FK2cBTosug%2FRO3c%2F6YeRP06wVzVWhLhxRqgqMXjE%3D)
4. Click **SIP**.![](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/10152?sv=2026-02-06&spr=https&st=2026-11-03T23%3A20%3A38Z&se=2026-11-04T00%3A20%3A38Z&sr=c&sp=r&sig=w%2FY%2FK2cBTosug%2FRO3c%2F6YeRP06wVzVWhLhxRqgqMXjE%3D)
5. Enter a **Local SIP Port**. Typically we use ports 16000, 16001, 16002, etc.
  - > [!NOTE]
> Note:
> 
> *Do not assign ports below port 1024, as the lower ports are typically used by other applications. Additionally, If you are assigning a local SIP Port to more than one phone, each phone will need a unique port.*
> 
> ![](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/10153?sv=2026-02-06&spr=https&st=2026-11-03T23%3A20%3A38Z&se=2026-11-04T00%3A20%3A38Z&sr=c&sp=r&sig=w%2FY%2FK2cBTosug%2FRO3c%2F6YeRP06wVzVWhLhxRqgqMXjE%3D)
6. After setting the port assignment, click **Save**.
7. If the phone does not take the configuration at first, reboot the device and try to assign the port again.

### Yealink Phones

1. Navigate to the **Yealink login page**.
2. Log in using the following credentials.
  - **Username**: admin
  - **Password**: admin or MAC password![](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/11062?sv=2026-02-06&spr=https&st=2026-11-03T23%3A20%3A38Z&se=2026-11-04T00%3A20%3A38Z&sr=c&sp=r&sig=w%2FY%2FK2cBTosug%2FRO3c%2F6YeRP06wVzVWhLhxRqgqMXjE%3D)
3. Navigate to **Settings** > **SIP**.
4. Modify the Local SIP Port.![](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/11061?sv=2026-02-06&spr=https&st=2026-11-03T23%3A20%3A38Z&se=2026-11-04T00%3A20%3A38Z&sr=c&sp=r&sig=w%2FY%2FK2cBTosug%2FRO3c%2F6YeRP06wVzVWhLhxRqgqMXjE%3D)