NCC - Agent Bandwidth & Computer Requirements

Article 000003872 · Updated Feb 4, 2026 · 5,628 views

Introduction

The NCC platform is designed for use with a Chrome browser on any PC that supports the Google Chrome browser. The agent interface also provides a built-in WebRTC softphone so users do not have to download third-party softphones.

Users also have the ability to change the telephony connection from the native WebRTC to either a SIP address (to ring a third-party SIP-based phone) or to ring a PSTN number, such as a landline, cell phone, or DID extension behind a legacy PBX.

Both the WebRTC and SIP functions will require a reliable, high-speed internet or VPN, or MPLS connection.

Network Requirements

Below are FQDNs and IP ranges that should be placed on the allow list on your firewall.

IP Addresses/Hosts

United States
DescriptionFQDNIP(s)
Login URLnextiva.thrio.io/lioncc/

34.74.62.174

35.245.164.111

34.148.72.224

WebRTC Devices

All Customers

34.168.242.123

34.83.225.187

34.150.158.246

34.145.183.174

34.82.247.19

34.53.56.72

34.169.191.153

136.118.149.224

35.245.20.232

34.48.81.1

35.245.97.9

136.107.18.148


Non-Predictive Customers

35.203.142.105

35.230.120.235

34.86.138.94

34.86.189.253

34.48.30.104

35.203.146.227

35.227.176.36

34.48.56.95

34.150.203.73

34.145.161.75

34.86.92.29

34.145.230.80


Predictive Customers

34.145.75.128

34.19.23.25

34.169.32.84

35.197.32.65

34.82.145.10

34.82.187.53

34.145.94.71

34.86.176.91

34.150.206.223

34.48.133.60

34.86.181.208

34.86.83.17

34.86.128.214

34.150.210.122

NAT IPs

Non-Predictive Customers

35.245.118.145

35.194.81.194

35.229.64.42

35.237.143.224

35.237.11.144

34.75.60.217

35.245.20.232

34.48.81.1

35.245.97.9

136.107.18.148


Predictive Customers

35.229.64.42

35.237.143.224

35.237.11.144

34.75.60.217

34.26.141.50

35.231.117.233

104.196.211.189

34.74.13.115

 

Canada
DescriptionFQDNIP(s)
Login URLnextiva.thrio.io/lioncc/

 

35.203.6.95

 

WebRTC Devices

 

34.168.242.123

34.83.225.187

34.150.158.246

34.145.183.174

34.118.172.81

34.152.39.14

 

NAT IPs

 

35.203.77.109

34.95.52.57

 

 

Spain
DescriptionFQDNIP(s)
Login URLnextivaeu.thrio.io/

 

34.175.68.127

 

WebRTC Devices

34.175.204.18

34.175.124.111

34.175.113.85

NAT IPs

34.175.113.92

34.175.174.117 

 

United Kingdom
DescriptionFQDNIP(s)
Login URLeurope.thrio.io/

34.89.0.83

WebRTC Devices

 

34.89.120.194

34.175.170.105

34.105.242.59 

 

NAT IPs

 

35.189.99.120

35.234.132.181

 

 

 

Ports

DescriptionPort TypePort(s)
WebRTC Devices

HTTPS

WSS

443
WebRTC and RTPUDP

10000 - 65535

WebRTC and SIP DevicesSIP

5060 - 5061

 

Additional Allow List Considerations

NCC uses https://storage.googleapis.com to interact with https://cloud.google.com/storage to create/retrieve/delete files in Google Cloud Storage. These files can include: system prompts, recordings, uploaded CSVs (lead lists, object lists, field mappings, public and private keys, directory messaging attachments, avatars, etc.), or anything that requires file storage. These URL should be whitelisted to avoid disruptions in NCC.

 

Whatsapp network requirements must be maintained in order to integrate within NCC.

 

DescriptionIP RangePort TypePort Range
Whatsapp168.86.128.0/18UDP10000 - 60000

Bandwidth Requirements

The absolute minimum requirement is 300 Kbps per agent. Ideally, each agent would have a connection in the 1 Mbps to 5 Mbps range or higher. This connection must be stable and ideally not on the same network where video streaming or other bandwidth-hogging activities are occurring. At the time of establishing the agent connection, a large amount of data is transferred (agents, queues, campaigns, etc.), but this information is kept in memory thereafter.

Computer and Monitor Requirements

  • A multimedia-equipped computer with a minimum of 8 GB of RAM.
  • A computer running the latest version of Google Chrome.
  • High-quality noise-canceling headphones with its own dedicated power supply.
  • A computer screen with a diagonal of 45 cm (18 inches) is optimal. For supervisors to have an additional screen in order to use the dashboards would be optimal.

WebRTC Diagnostic Tool

If you are experiencing issues with using the NCC platform, you can run a diagnostic from your machine to identify issues that may exist.

 

  1. From the device experiencing the issue navigate to https://webrtc.nextiva.com/
  2. Click Start Test if it is your first visit, or Start New Test to run the test again.
  3. During the Audio Quality section of the test, speak into your microphone; you should hear what you said repeated back over your speakers.
  4. After the test completes, address any issues identified by the tool.

 

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