Nex-Pro System check
- Line speed
...Standby
Actual value：
Judgment criteria：
3Mbps or more
○
1-3Mbps
△
Less than 1Mbps
×
- Check the connection to the streaming server
...
Click here to play
Browser result：
Judgment criteria：
Connection possible
○
Connection to the delivery server has been established.
Partially disconnected
△
Connection to some delivery servers could not be established.
Other
×
Not supported.
Details：
Live
Simulated livedistribution
On-demanddistribution
- Video / audio viewing check
Along with confirmation of video playback, check the " Recommended System Specs " below and If the video does not play, please try viewing on a separate device or network environment.
Recommended System Specs
| OS | Windows | Mac | Android | iOS |
|---|---|---|---|---|
| Version | latest version | latest version | latest version | latest version |
| browser |
|
|
|
|
| Line speed |
Measured over 3Mbps at wired or wireless speed *For the optimal viewing experience, we recommend using a wired connection. |
|||
If your terminal may be controlling which domains are accessible through your company's Internet filtering system,
you will need to allow the following domains. Please check with your company's system administrator.
※Please allow the following domains until February 20, 2026.
| Host | Port number | Usage rules |
|---|---|---|
| d2gk28ypd7yjos.cloudfront.net | 80, 443 | Static file downloads (required for various operations) |
| d3i144lizm07wo.cloudfront.net | 80, 443 | video viewing |
| d17g02h5e0h754.cloudfront.net | 80, 443 | video viewing |
| *.opentok.com | 80, 443 | video viewing |
| *.tokbox.com | 80, 443 | video viewing |
| *.vonage.com | 80, 443 | video viewing |
| *.live-video.net | 80, 443 | video viewing |
※Please allow the following domains after February 20, 2026.
| Host | Port number | Usage rules |
|---|---|---|
| v2.nex-pro.com | 443 | system overview |
| live-cdn.v2.nex-pro.com | 443 | live viewing |
| vod-cdn.v2.nex-pro.com | 443 | ondemand viewing |
| asset-cdn.v2.nex-pro.com | 443 | display images, etc. |
| custom-asset-cdn.v2.nex-pro.com | 443 | display images, etc. |
| *.opentok.com | 443, 3478(UDP) | panel discussion (Low-latency delivery) |
| *.tokbox.com | 443, 3478(UDP) | panel discussion (Low-latency delivery) |
| *.vonage.com | 443, 3478(UDP) | panel discussion (Low-latency delivery) |
| *.live-video.net | 443 | pseudo live viewing |
※*. notation includes multiple levels of subdomains.
*Customers with viewing problems should try viewing on another device such as a smartphone, browser, or using a wired connection.
See also "
Troubleshooting"below.
Troubleshooting
Q:Volume is too low, how can I increase it?
A:
Is the volume muted or turned down? Increase the PC volume and check. Check the headphone volume.
Also check if the microphone and speaker are plugged in properly.
Also check if the microphone and speaker are plugged in properly.
Q:
Result of the line speed check was
△×. Can I do something about it?
A:
If you are connected via a wireless LAN, try a wired LAN. If it does not improve, try changing the network.
Q:
The connection to the streaming server was
×, and the countermeasure displayed at the time of the decision was tried, but it did not improve
A:
You have to be able to connect to our server to be able to view a broadcast.
Please check the settings of security software, etc., or try changing the browser or terminal.
Please check the settings of security software, etc., or try changing the browser or terminal.
Q:
The connection to the streaming server was
○but I cannot view the video/hear anything.
A:
Please contact "
Contact Information" below
Q:
There is a chance the video might be blocked by my company's firewall.
A:
Please permit connection to the following domain used for broadcasting:
※Please allow the following domains until February 20, 2026.
| Host | Port number | Usage rules |
|---|---|---|
| d2gk28ypd7yjos.cloudfront.net | 80, 443 | Static file downloads (required for various operations) |
| d3i144lizm07wo.cloudfront.net | 80, 443 | video viewing |
| d17g02h5e0h754.cloudfront.net | 80, 443 | video viewing |
| *.opentok.com | 80, 443 | video viewing |
| *.tokbox.com | 80, 443 | video viewing |
| *.vonage.com | 80, 443 | video viewing |
| *.live-video.net | 80, 443 | video viewing |
※Please allow the following domains after February 20, 2026.
| Host | Port number | Usage rules |
|---|---|---|
| v2.nex-pro.com | 443 | system overview |
| live-cdn.v2.nex-pro.com | 443 | live viewing |
| vod-cdn.v2.nex-pro.com | 443 | ondemand viewing |
| asset-cdn.v2.nex-pro.com | 443 | display images, etc. |
| custom-asset-cdn.v2.nex-pro.com | 443 | display images, etc. |
| *.opentok.com | 443, 3478(UDP) | panel discussion (Low-latency delivery) |
| *.tokbox.com | 443, 3478(UDP) | panel discussion (Low-latency delivery) |
| *.vonage.com | 443, 3478(UDP) | panel discussion (Low-latency delivery) |
| *.live-video.net | 443 | pseudo live viewing |
Q:Video player does not appear.
A:
It may be blocked by your company's Internet filtering system. Please get the above domain permission.
Contact Information
クレスコ・イー・ソリューション株式会社
E-mail:seminar@cresco-es.co.jp