Creating a SIP Extension in Yeastar P-Series Cloud Edition
Introduction
An extension is an internal phone number assigned to a person. Every team member who needs to make or receive calls needs their own extension. This guide covers how to create one in the Yeastar P-Series Cloud Edition admin portal.
Menu path
Extension and Trunk > Extension, click Add, then select Add.
Step-by-Step Guide
Step 1 — User Information
Fill in the personal details for this user:
| Field | What to enter |
|---|---|
| First Name | User's first name |
| Last Name | User's last name |
| Email Address | Work email — used for voicemail-to-email and welcome emails |
| Mobile Number | Optional — used for SMS notifications |
| User Password | Password the user logs into the Linkus app with |
| User Role | Select User for a standard employee; Admin only for IT administrators |
Step 2 — Extension Information
Scroll down to the Extension Information section:
| Field | What to enter |
|---|---|
| Extension Number | e.g. 1001 — use a consistent numbering scheme |
| Caller ID | Usually the user's name — shown on receiving phones when they call internally |
| Registration Name | Usually the same as the extension number |
| Registration Password | Auto-generated — note this down, you'll need it to register an IP phone |
Leave Concurrent Registrations at defaults unless the user needs to be logged in on multiple devices simultaneously.
Step 3 — Save
Click Save and Apply (the orange button that appears at the top of the page).
Step 4 — Verify
Go back to Extension and Trunk > Extension. The new extension appears in the list. Its status will show as offline until a phone or the Linkus app registers to it.
Sending a welcome email to the user
After creating the extension:
1. Find the extension in the list and click to edit it.
2. Click Send Email — this sends the user their Linkus app QR code and login details.
Bulk importing extensions
To create many extensions at once:
1. Go to Extension and Trunk > Extension.
2. Click Import and download the CSV template.
3. Fill in the spreadsheet and upload it.
Tips
- Use 4-digit extension numbers (e.g. 1001, 1002) for businesses — they're easier to remember than 3-digit numbers if you have more than 9 users.
- Extension numbers must be unique across the system.
- You can edit any field later by clicking the extension in the list.
Summary
The extension is created. Next, register a SIP phone or the Linkus app to this extension so the user can start making and receiving calls.