---
title: "X Series SIP Trunk FAQ"
slug: "x-series-sip-trunk-faq"
updated: 2026-05-22T13:41:22Z
published: 2026-05-22T13:41:22Z
canonical: "help.8x8.com/x-series-sip-trunk-faq"
---

> ## 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.

# X Series SIP Trunk FAQ

## Overview

There are no facilities in 8x8 Admin Console to edit SIP Trunk configurations in the new X Series environment. To make modifications in the future, submit a case to the 8x8 Technical Support team.

## Applies To

- 8x8 X Series
- SIP Trunk

---

### Questions & Answers

#### How do I change my X Series SIP Trunk configuration?

Your initial X Series SIP Trunk configuration will be set up by 8x8 Professional Services. Should you need to edit any of the following in the future, submit a case to8x8 Technical Support who can make the necessary changes:

- Edit X Series SIP Trunk configurations (such as IP address)
- Modify the E911 emergency address
- Assign an Admin Console claimed number to an X Series SIP trunk
- Remove numbers from the X Series SIP Trunk and return them to Admin Console

#### Do I need to do anything before an upgrade from Account Manager to X Series?

No changes need to be made as the upgrade will be a seamless process. Your 8x8 services will function and be available as normal.

#### How do I review my usage?

All SIP Trunk CDRs will appear in your monthly bill together with their costs like other X Series services.

#### When do usage minutes begin?

Usage minutes begin at the moment the call is answered. This answer from a technical perspective is a SIP 200 OK. A simple SIP call flow that determins a 200 OK is shown in the diagram below: ![200OK.png](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/14772?sv=2026-02-06&spr=https&st=2026-11-03T23%3A12%3A12Z&se=2026-11-04T00%3A12%3A12Z&sr=c&sp=r&sig=kti6pkutU17shjZJbEFQD40SPm7KdMQZXbWA41ZZEKA%3D)

**To summarize the above scenario:**

- Usage billing starts when the call is answered (200 OK).
- 8x8 rounds to the highest minute. If a call is a length of 1 second, a standard rounding to 1 minute will be billed.
- **Noting**: Billing usage begins when the called number answers, this may be any application or person that answers and a 200 OK is sent.

#### How do I claim a new number in Admin Console for my SIP Trunk?

- See [Claim Phone Numbers in 8x8 Admin Console](/support/docs/claim-phone-numbers-in-8x8-admin-console).
- After the number has been claimed in Admin Console, create a case with 8x8 Technical Support who can then assign it to your X Series SIP Trunk.
- Should you later wish to use an X Series SIP Trunk number for another X Series service, simply contact 8x8 Technical Support who can then return your number to the Admin Console - Phone numbers list as an Available number.