How to stop calls from e.g. 100, 101, 1000, 1001 (Ghost calls)

💡

How to stop ghost calls (constant calls from 1000, 100, 1001, etc)?

A guide on how to combat ghost calls

💡

The definition

A ghost call is a call in which, when the recipient of the call answers, there is no one on the other end of the call, or you could receive calls from random (short) phone numbers with no one on the other line when you answer.

You may try the following solutions:

💡

1. Change the local SIP port on the device:

Log into the phone's web interface (using an IP number).

Select 'Settings' and then select 'SIP'

Change 'Local Sip Port' and 'TLS SIP Port': change from, e.g. 5060 to 5160 and 5061 to 5161.

💡

2. Check the firewall settings for the router:

Set your firewall to be more restrictive. Our advice is to permit all SIP / VoIP traffic from our platform. The IP range you should use is 195.35.114.0/23 (or 195.35.114.0/24 and 195.35.115.0/24). All other SIP / VoIP traffic you can block.

If the above does not work…

💡

3. Extra settings on Yealinks:

Yealink support page

Some information from the Yealink page

If it's a Yealink phone (there quite prone to receiving ghost calls) go to the:

Features tab and General information
Set Accept SIP Trust Server Only to 'Enabled' and

Allow IP Call to ‘Disabled’

📌

Accept SIP trust server only allows the phones to only accept the SIP message from your SIP server and outbound proxy server. It can prevent the phone from receiving fake (ghost) calls with phone numbers like 100, 1000, and so on. If you enable this feature, the phone cannot accept an IP address call.

📌

More information on how the SIP (Session Initiation Protocol) works.

✍️

I have feedback on your help pages!

Updates

We are constantly working on our platform and other products. If you want to stay informed of all updates, check for new updates

Still, want to speak to a colleague?

Can't quite figure it out or get it right? Call our Customer Happiness Team at 021 012 5000 or send an email to info@voys.co.za