Netcomm Routers, though powerful and feature-rich, have a habit of hiding VoIP Caller IDs on outbound calls.
This guide covers how to resolve this pesky problem.
Accessing the hidden settings page
On a computer that's connected to the Netcomm NF18 Mesh router (via Wi-Fi or Ethernet/wired connection) enter the following web address:
http://192.168.20.1/voicesip_advanced.html
You may need to sign in using the default administrator username and password, or the administrator username and password you've set.
Making the changes
Once inside the advanced VoIP settings page, un-check the Anonymous Calling options.
Don't forget to save!
Test
Make a test call to confirm the caller ID no longer shows as 'Anonymous'.