# Simulation of external calls
A useful tool for configuring MikoPBX is to simulate incoming and outgoing external calls without connecting a real provider, thus saving costs.
## Creating a New SIP Provider on the PBX
1. Go to **"Call Routing"** → **"Telephony Providers"**:
"Telephony providers" section
2. Add a new **SIP Provider**:
Adding a new SIP provider
3. Specify the following parameters for the new provider:
* **Name** – arbitrary
* **Account Type** – "Incoming Registration"
* **DTMF Mode** – "auto"
Imitation Provider parameters
4. In the provider creation menu, go to **"Advanced Settings"**:
Disable the **"fromuser"** field.
In **"Additional Options,"** add:
```php
[endpoint]
callerid = 66179878899 <66179878899>
```
{% hint style="success" %}
You can replace **"66179878899"** with any desired number.
{% endhint %}
Additional Parameters
Save your settings and note:
* The provider ID, e.g., **"SIP-TRUNK-704CB9B8"**, which you can find in the address bar or in the provider details.
* The password.
ID and Password of Provider
## Connecting a Softphone for Call Simulation
To make calls with a simulated number, you need to connect the provider to a softphone. In this example, we’ll use Zoiper.
1. Enter the following credentials:
* **Login** – `"ProviderID@MikoPBXIPAddress"`
* **Password** – The password from the provider’s settings.
{% hint style="info" %}
Replace:
* **ProviderID** with the ID of your provider.
* **MikoPBXIPAddress** with the IP address of your PBX.
{% endhint %}
Zoiper credetionals
2. Complete the authorization process by clicking through “**Next**.” You can verify the successful connection by checking the provider’s status indicator:
Connection Indicator
## Routing Configuration
For the simulation provider to work properly, you must define both incoming and outgoing routes. Below are examples used in this guide.
### Incoming Routing
Incoming Calls routing
### Outbound Routing
Outgoing Template
Alternatively, you can manually describe a route for simulating external calls (add this at the end of the **"extensions.conf"** file in **"System file customization"**):
```php
[SIP-TRUNK-0CDC0182-22-outgoing]
exten => _X!,1,NoOp(Outgoing call to ${EXTEN})
same => n,Set(CALLERID(num)=66179878899)
same => n,Dial(PJSIP/${EXTEN}@SIP-TRUNK-0CDC0182)
same => n,Return()
```
In this example, the route applies to calls through the **"SIP-TRUNK-0CDC0182"** provider, and the displayed caller number is **"66179878899"**.
{% hint style="danger" %}
In the context above, change **"**SIP-TRUNK-0CDC0182**"** to your actual provider ID and 66179878899 to your number.
{% endhint %}
