---
title: "Outbound Calls Fail on Poly Trio Phones After Manually Applying SIP Credentials"
slug: "outbound-calls-fail-on-poly-trio-phones-after-manually-applying-sip-credentials"
updated: 2026-05-11T17:57:38Z
published: 2026-05-21T21:27:00Z
canonical: "help.8x8.com/outbound-calls-fail-on-poly-trio-phones-after-manually-applying-sip-credentials"
stale: true
---

> ## 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.

# Outbound Calls Fail on Poly Trio Phones After Manually Applying SIP Credentials

## Symptom

After manually applying SIP credentials to certain Poly devices, outbound calls fail.

## Applies To

- Poly Trio Series

## Resolution

This is due to the BFCT codex not being disabled, as this is defaulted to be enabled. When provisioning the phones with 8x8, the configuration will apply the setting to be disabled, whereas applying the SIP credentials does not.

You will need to download the configuration from the Web GUI of the device and apply a line of code in order to resolve the issue.

The device web interface (GUI) allows you to make changes to the phone's settings via a web browser on your computer, which can often be more convenient than on the phone screen itself. You must ensure that:

- The phone is plugged into the network
- The computer is on the same network as the phone

1. In a web browser on a computer on the same network as the phone, browse to the phone's IP address (https://<IP address of phone).
2. Log in with the following details:

> [!NOTE]
> Note:
> 
> *Device information and MAC password can be found in 8x8 Admin Console.*
  - Username: Admin
  - Password: Phones MAC Password
3. Click on **Utilities > Import & Export Configuration.**
4. Expand the **Export Configuration** section.
  - While **All Configuration (except Device Settings)** is selected, hit **Export**.
  - Save the resulting file.
5. Click on the dropdown menu and select **Device Settings**.
  - Hit **Export** and save the resulting file.
6. Once you have the file open it up in a text document and add the following to it:

```xml
<?xmlversion="1.0"encoding="UTF-8"standalone="yes"?>
<PHONE_CONFIG>
  <ALLcontent.bfcp.enabled="0"/> (this is the new line)
</PHONE_CONFIG>
```
7. Once added save the file and re-upload the configuration file to the affected device.

## Cause

This is due to the BFCT codex not being disabled.