To further assist you, we need to know how the system is deployed on your network and how it will be connecting to your office abroad. Is it via WAN or using public IP address to dial the endpoint in your office abroad? Is there a firewall in between your network and your office abroad? Do you have a call control/SIP registrar/gatekeeper to register the system? Are you deploying the system as standalone without registration to SIP registrar/H323 gatekeeper?
To make it work as standalone and make basic calling using direct IP dialing and assuming the network connectivity is already established between your network and your office abroad.
1. Go to the System Configuration >Network > IPv4 and assign:
- IP address
- Subnet mask
- Gateway
- DNS
2. Enable H323 service: System Configuration > NetworkServices > H323 Mode: On
3. System Configuration > H323 > Profile 1 > CallSetup Mode: Direct
4. System Configuration > Conference1 > DefaultCall: H323
5. Restart the system.
Admin guide:
http://www.cisco.com/c/dam/en/us/td/docs/telepresence/endpoint/ce80/sx20-administrator-guide-ce80.pdf
regards,
Acevirgil