---
title: Grandstream UCM SIP Trunk Setup with a Kenyan Number
description: >-
  Add a Sautikit Kenyan number to a Grandstream UCM6300 as a Register SIP Trunk:
  host name with port 5080, username, auth ID, Need Registration, routes.
summary: >-
  On a Grandstream UCM, add a Register SIP Trunk with host
  sip.sautikit.com:5080, your Sautikit SIP username, auth ID and password, tick
  Need Registration, then add routes.
date: 2026-11-05T00:00:00.000Z
type: guide
---


## Summary

A Grandstream UCM6300 IP PBX can use a Kenyan Sautikit number as its SIP trunk. In the web GUI, go to **Extension/Trunk > VoIP Trunks > Add**, choose **Register SIP Trunk**, and set Host Name = `sip.sautikit.com:5080`, Transport = UDP, Username and Auth ID = your Sautikit SIP username, Password = your SIP password, and tick **Need Registration** (it is off by default). Then add an inbound route for the trunk and an outbound route that sends `+254` numbers. The number costs KES 500 a month, inbound calls are free and outbound calls cost KES 3.00 a minute billed per second.

## What you need

- **A Sautikit number** (KES 500 a month) and a SIP credential for the UCM: in the [Sautikit console](https://app.sautikit.com), open the number, go to **SIP & Devices**, click **+ Add device**, label it "UCM", and keep the username, password and the device's **extension**.
- **Admin access** to the UCM web GUI.

## Sautikit settings at a glance

| UCM field | Value |
|---|---|
| Type | Register SIP Trunk |
| Provider Name | Sautikit |
| Host Name | `sip.sautikit.com:5080` |
| Transport | UDP |
| Need Registration | **ticked** |
| Username | your Sautikit SIP username |
| Auth ID | your Sautikit SIP username (same value) |
| Password | your Sautikit SIP password |
| From User | your Sautikit SIP username |
| Codec Preference | PCMU, PCMA first |
| SRTP | off |

## Step 1: add the trunk

1. Go to **Extension/Trunk > VoIP Trunks** and click **Add**.
2. Choose **Register SIP Trunk** and fill in the fields from the table.
3. Tick **Need Registration**. Without it, the UCM never registers and inbound calls cannot reach it.
4. On **Advanced Settings**, put PCMU and PCMA first in Codec Preference and leave SRTP off.
5. Save and **Apply Changes**.

Grandstream's docs describe Host Name as an IP address or URL; writing the port after a colon (`sip.sautikit.com:5080`) is how you point the UCM at a non-default port. Sautikit listens on 5080, not 5060.

## Step 2: check registration

Open **System Status > Dashboard** and check the trunk shows as registered. Behind NAT, set External Host and Local Network under **PBX Settings > SIP Settings > NAT**.

## Step 3: inbound route

**In Sautikit:** open the number and set **Forward** to the UCM device's extension.

**On the UCM:** go to **Extension/Trunk > Inbound Routes**, add a route for the Sautikit trunk, and set the default destination: an extension, ring group, IVR or queue.

## Step 4: outbound route

Go to **Extension/Trunk > Outbound Routes** and add a route that uses the Sautikit trunk. Sautikit dials E.164, so for local mobile numbers use pattern `_07XXXXXXXX`, strip 1 digit and prepend `+254`. Calls dialled as `+254…` pass unchanged. Outgoing calls show your Sautikit number as caller ID.

## Step 5: test

Call your mobile from an extension, then call the Sautikit number from your mobile.

## Troubleshooting

**The trunk never registers.** Check Need Registration is ticked, the host includes `:5080`, and transport is UDP.

**Registration is rejected.** Username, Auth ID and From User should all be the generated Sautikit username. Copy the password again with **SIP setup** on the device row.

**Outbound calls fail.** Check the route produces `+254…` numbers and your Sautikit wallet has credit.

## No PBX needed for desk phones

Grandstream desk phones can also register straight to a Sautikit number, with no UCM in between. See [Connect a Grandstream phone](/developers/guides/connect-grandstream-phone).

## FAQ

### How do I configure a SIP trunk on a Grandstream UCM?

Add a Register SIP Trunk under Extension/Trunk > VoIP Trunks with the provider's host, username, auth ID and password, tick Need Registration, then add inbound and outbound routes.

### Which port does Sautikit use?

5080 over UDP at `sip.sautikit.com`. Enter the host as `sip.sautikit.com:5080`.

### What does the trunk cost?

No trunk fee. The number is KES 500 a month, inbound calls are free and outbound calls are KES 3.00 a minute billed per second.