This is a summary of the necessary IP Office system configuration changes. This section assumes that you are already familiar with IP Office system and H.323 IP telephone installation
Before you begin
If more than 4 remote extension users are to be supported, the system must include available Teleworker and or Power User licenses for those users.
Procedure
In the System tab configure the following:
Go to System > LAN1 > LAN2 > VoIP.
Enable the H323 Gatekeeper Enable checkbox.
Note:
Due to the additional user and extension settings needed for remote H.323 extension configuration, the extension and user entries for the remote H.323 extensions and users are added manually.
Enable H.323 Remote Extn Enable.
Enter the required value in Remote Call Signaling Port.
The default value 1720 also matches the port used by internal extensions.
Set RTP Port number Range (NAT) to encompass the port range that should be used for remote H.323 extension RTP and RTCP traffic.
Note:
The range setup must provide at least two ports per extension being supported.
In Network Topology tab configure the following:
Note:
STUN can be used to determine the type of NAT/firewall processes being applied to traffic between the IP Office system and the Internet.
Go to Network Topology and set STUN Server IP Address to a known STUN server.
Click OK
The Run STUN button is enabled.
Click Run STUN and wait while the STUN process is run.
The results discovered by the process is indicated by ! icons next to the fields.
If STUN reports the Firewall/NAT Type the network must be reconfigured.
Note:
Static Port Block, Symmetric NAT or Open Internet netowrk types are not supported for remote H.323 extensions.
In User tab configure the following:
Go to the User tab set the User Profile to Teleworker or Power User.
