Phantom calls can appear on Grandstream Analog Telephone adapters showing the caller ID 100 or something similar if they are not correctly programmed. These calls are not originating through IXICA but are actually coming directly from the Internet.

Here are the steps you should follow to stop these calls from appearing:

1. Log into your ATA as you normally do to program it.

2. Click on the tab called Advanced Settings

3. Find "Disable Direct IP Call" and set this value to 'yes' and apply the settings.

4. Click the FXS port tab

5. Set "Validate Incoming SIP Message" to 'yes' 

6. Set "Check SIP User ID for Incoming INVITE" to 'yes' (this is optional and if you encounter incoming call problems after setting this to yes then please set it to no)

7. Set "Allow Incoming SIP Messages from SIP Proxy Only" to 'yes'

8. Apply these changes.

You should not receive these ghost calls anymore
This guide will enable IXICA customers to connect their Grandstream UCM PBX to IXICA SIP Trunks.

Step 1
Log into your UCM and click on the PBX tab at the top as shown in Figure 1

Figure 1

Step 2
Under the heading Basic/Call Routes click on VoIP Trunks as shown in Figure 2

Figure 2

On the right of the page you will now see a button called "Create New SIP Trunk. Click on this button as seen in 

Figure 3

Step 3
You will now see a window called Create New SIP Trunk as seen in Figure 4 below.

Figure 4

In this window please fill the following fields as indicated:

Type: Register SIP Trunk
Provider Name: ixica
Host Name: or
Transport: UDP (this field may not display until the intial settings are saved)
NAT: Checked
Need Registration: Checked
Username: Your username provided by IXICA
Password: Your Password provided by IXICA

*Note: If you have enabled Caller ID Passthrough with IXICA then you must uncheck the field "Keep Trunk CID". You can then override the trunk CID with CID of individual Extensions or passthrough by checking "Keep Original CID"

Now click on Save

Once the settings are saved you will need to click on Edit (pencil) as seen in Figure 5

Figure 5

Step 4
You will now have the option of clicking on Advanced Settings and a screen as seen in Figure 6 will show. In this section please complete the following fields accordingly.

From Domain:
From User: This should be your username given by IXICA

Now click on Save

Figure 6

Step 5
You will need to create inbound routes for the DIDs on your account.

Click on Inbound Routes in the left menu.

You will now see a screen like the one in Figure 7.

Populate the following fields as indicated:

Trunks: SIPTrunks -- ixica

DID Pattern: _1NXXNXXXXXX should be replaced by your DID with a _1 in front of it. So if you DID is 4162734828 then you should put _14162734828 into the DID pattern field. If you have multiple DIDs you should create a separate Inbound Rule for each DID so that you can individually perform call control.

The Default Destination is where you want to send the inbound call.

Figure 7

Step 6
You will now create an outbound route to enable outward calling.

Click on Outbound Routes in the Basic/Call Routes section.

A window will display as shown in Figure 8

Now populate the following fields as indicated:

Calling Rule Name: main
Pattern: _1NXXNXXXXXX (you may customize this but IXICA will require the call to arrive in 1NXXNXXXXXX format)

Figure 8

This concludes the guide and you should now be able to make and receive calls. If you require further assistance please contact our support team at

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