What are the required to Voxmeter VoiP Call

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How to get help from ISP (Home Internet Service) to make a VoIP call?

1. You describe problem you can't hear sound from VoIP call using UDP protocol.

2. You also can't reach to VPN (Virtual Private Network) use TCP port 1723 On Windows PC.

What are the required 'to Voxmeter VoIP Call'?

Network

See below for the protocols that need to be installed and available on the network for your phones to work properly and consistently.

Laptop/PC need to be able to initiate outbound TCP, and UDP connections to a range of Voxmeter IP addresses on arbitrary ports. In most cases, the laptop/pc initiates these connections from within home network. Any allow-list-only configuration on the firewall won't work. Please be aware that these are all destination ports that the phones send traffic to. The source port for these connections can vary by ISP (Internet Service Provider) vendor, solution, etc. Any firewall determinations based on source ports are very problematic. We strongly recommend allowing all traffic to and from our IP Blocks. Here are the specifics:

  • Persistent NAT connections — Our system sends NAT keep-alive every 30 seconds.
  • HTTP (TCP port 80) and HTTPS (TCP port 443) for access to https://voxmeter.catglobe.com
  • SIP (UDP ports 4569) — Multiple connections must be allowed over these ports.
    • Use TCP port 4569
  • All internally-initiated UDP connections to ports 10,000-65,500 (RTP).
  • TCP on ports 1723 Only required for Interviewer who got blocked traffic on RTP (1way sound problem). Voxmeter technical team need setup VPN on Interviewer endpoint. Our automated package can setup VPN.
Protocol
Port Number(s)
Direction Access Type
Comments
TCP
80,443
Outbound Web client
Web browser (Firefox, Chrome)
UDP
4569
Outbound SIP Signaling
SIP client (Microsip, Zoiper,Telephony)
TCP
4569 Outbound SIP Signaling
SIP client (Microsip, Zoiper,Telephony)
UDP
8000-65500
Inbound and Outbound
Media ports (RTP)
IP client (Microsip, Zoiper,Telephony)
TCP
1723
Outbound
VPN traffic
Microsoft build-in VPN client
UDP
3478
Outbound Stun
Google Stun, Zoiper Global Stun


It rarely to block UDP ports. We find out that few special Internet router block UDP traffice.

Ask your Internet Service Provider supporter for help setting this up.

1. Ask them they you can't hear sound/ audio for VoIP Call.

2. You can't connect to VPN tcp/1723 also.

Computer/PC

Useful links

1. How to open ports  on Icotera router to pass through VoIP traffic https://portforward.com/icotera. We recommend you create DMZ zone to your computer and uncheck Stun in SIP client.

2. STUN reference https://help.singlecomm.com/hc/en-us/articles/115007993947-STUN-servers-A-Quick-Start-Guide