Configuring SX20 as a Standalone device
Things get much simpler and easy when you want to configure SX20 as a Standalone device. This is a much needed feature when someone wants to use SX20 for Video conferencing but they don't have any telepresence equipment.
Using H323 protocol we can configure SX20 as standalone device, where as SIP can be used in case of CUCM deployed environments.
8. The most important step in the entire configuration; If your device is under any nat device you don't need to nat it again, for example your SX20 unit is in LAN behind a firewall and your Firewall will do natting for all the PCs in LAN, then you don't need to enable NAT in SX20 device. If you enable nat then the IP will be double natted and you end up getting one way audio and video in the SX20 Unit.
Using H323 protocol we can configure SX20 as standalone device, where as SIP can be used in case of CUCM deployed environments.
To configure SX20 as a standalone device, follow the below steps:
1. Enable H323 from network service
2. Select default call control protocol as H323
3. Select Mode to Off (Optional)
4. Go to H323 configuration page; System -- Configuration -- H323
5. Select Call setup mode: Direct
6. Port Allocation: Static
7. Under H323 Alias, Configure ID as Your SX20 Unit IP address.
Do not assign any URI under ID, leave it with just the IP address. URI will be configured only for SIP, whereas H323 will work based on IP address only.
(Private or Public IP is immaterial, just assign whatever the IP assigned to the unit)
Do not assign any URI under ID, leave it with just the IP address. URI will be configured only for SIP, whereas H323 will work based on IP address only.
(Private or Public IP is immaterial, just assign whatever the IP assigned to the unit)
8. The most important step in the entire configuration; If your device is under any nat device you don't need to nat it again, for example your SX20 unit is in LAN behind a firewall and your Firewall will do natting for all the PCs in LAN, then you don't need to enable NAT in SX20 device. If you enable nat then the IP will be double natted and you end up getting one way audio and video in the SX20 Unit.
When your device, is assigned with private IP but you don't have a nat device then you can configure the public IP under NAT and set mode to ON.
