> For the complete documentation index, see [llms.txt](https://docs.mikopbx.com/mikopbx/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mikopbx.com/mikopbx/english/faq/cases/how-to-implement-the-prompter-function.md).
# Call Monitoring (ChanSpy)
## Creating a dialplan
1. Go to the "**Modules**" - "**Dialplan Applications**". Create a new dialplan.
New Dialplan app
2. Enter the name "Eavesdropping". Specify the "number to call the application", here we will use the template "911XXX" - XXX means all **three-digit** numeric numbers. In the "**Type of code**" field, specify "**Dialplan Asterisk**"
Template of parameters for dialplan
## Templates
Further functionality you can choose from three options:
### 1. Eavesdrop on a conversation
It becomes possible to eavesdrop on someone else's conversation, so that neither the operator nor the client will suspect anything
In the tab "**Programme code**" insert the following code:
```php
1,Answer()
n,ChanSpy(${CHANNEL(channeltype)}/${EXTEN:3},qw)
n(hangup),Hangup();
```
The first implementation option
{% hint style="info" %}
**ChanSpy(SIP/${EXTEN:3},qw)** - note that the application number will be passed as EXTEN. If you dial 911101, the internal number 101 will be dialed. The first three digits are cut off.
If you change the length of the template, then you should adjust this line.
When using PJSIP, the command will look like **ChanSpy(PJSIP/${EXTEN:3},qw)**
{% endhint %}
### 2. To intervene in the conversation
In the tab "**Programme code**" insert the following code:
```php
1,Answer()
n,ChanSpy(${CHANNEL(channeltype)}/${EXTEN:3},qBx)
n(hangup),Hangup();
```
The second implementation option
{% hint style="info" %}
The differences are only in the parameters for **ChanSpy**
{% endhint %}
### 3. "Whisper'' to a colleague
In the tab "**Programme code**" insert the following code:
```php
1,Answer()
n,ChanSpy(${CHANNEL(channeltype)}/${EXTEN:3},wvq(4)x)
n(hangup),Hangup();
```
The third implementation option
{% hint style="info" %}
The differences are only in the parameters for **ChanSpy**
{% endhint %}
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