To complete the configuration, you need:

• Kerio Operator up and running.
• At least one internal extension.
• The Yeastar NeoGate gateway connected to the same LAN as Kerio Operator.

In the example below:

• The Kerio Operator IP address is 192.168.62.107.
• The Yeastar NeoGate gateway's IP address is 10.1.2.200.
• The trunk of numbers from the provider is 555 12xx.
• The internal extension number is 100.

1. In the administration interface of the Yeastar NeoGate gateway, click Gateway.

2. In the Digital Trunk section, click to open the trunk configuration.
3. In the Mode Type field, select:

• E1 in Europe.
• T1 in the USA.

3. In the Linecoding field, select:

• HDB3 in Europe.
• B8ZS in the USA.

4. In the Framing field, select:

• Enable CRC4 in Europe.
• ESF in the USA.

5. In the Switch Type field, select:

• Euro ISDNIntegrated services digital network - A technology enabling digital transmission of data and voice signals over a telephone network. in Europe.
• national in the USA.

6. Click Save.

After you finish configuring the trunk, you need to verify that the gateway is connected:

1. Click the Status button in the upper right corner.
2. Go to System Status > E1/T1 Status.
3. Verify that Alarm indicates Connect.

After verifying the gateway connection, continue with the configuration:

1. Go to VoIPVoice over Internet protocol - A digital telephone system that uses the internet as the transmission medium, rather than the PSTN. Settings > VoIP Trunk and remove all default VoIP trunks.
2. Click Add VoIP Trunk to open the Add New Account dialog box.
3. In the Trunk Type field, select Service Provider.
4. Key in a name for the VoIP trunk. For example, My Operator.
5. Key in the IP address (192.168.62.107) of Kerio Operator.

6. Click Save.
7. Go to Route Settings > Route List.
8. Click to edit the E1_to_SIP route.
9. In the Send Call Through field, select ServiceProvider — MyOperator and click Save.
10. Click to edit the SIP_to_E1 route.
11. In the Call Comes in From field, select ServiceProvider — MyOperator and click Save.

12. Click Apply Changes in the upper right corner.

1. In the administration interface of Kerio Operator, go to Configuration > Call Routing > Interfaces and routing of incoming calls.
2. Click Add SIP Interface.
3. Key in a name for the interface (for example, the name of the gateway). The name must not contain spaces or special characters and must be unique.
4. Select New provider.
5. In the With external number field, key in the number 555 12xx and click Next.

6. Select an extension (100) that receives all calls.
7. Optionally, in the Prefix to dial out field, key in a prefixCountry codes, area codes, a number, or a set of numbers that are dialed before the telephone numbers. for outgoing calls and click Next.
8. In the Domain (IP address/hostname) field, key in the IP address (10.1.2.200) of the Yeastar NeoGate gateway.

9. Verify the information in the Summary section and click Finish.