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You can use Microsoft’s VPN Dial Up Networking (version 1.3) to establish
a virtual private network connection between a roaming laptop and the
NBX system LAN. One end of the VPN connection is in the laptop while
the other end must be located in a VPN server between the router and
firewall.
The VPN server provides caller authentication and a secure (encrypted)
channel across the internet. After a caller has been authenticated, the
connection is passed to the firewall, which sees the VPN connection as
coming from a recognizable (and therefore firewall-configurable)
IP address. VPN allows a business person to establish an IP connection
into the NBX LAN from a hotel room with internet service.
After an Internet connection has been established, you must change your
automatic call forwarding number:
1 Log on to NBX NetSet as a user.
2 On the User Information tab, click Call Forward.
3 Click the telephone number radio button.
4 Enter the number to which you want to forward the call and click OK.
The caller is now ready to use NetMeeting to place an H.323 to the NBX
system at the office. Configure NetMeeting with the IP address of the
ConneXtions gateway as the gateway in Advanced Calling options. Dial
the NBX extension to place the call.
The call passes through the Auto Attendant to your extension and
forwards the call to your previously specified number.
After the call, return to NBX NetSet and remove the forwarded number
so that work-related calls to your extension are not forwarded to your
home, or to wherever you placed your last H.323 call.
PBX Connections H.323 gateways allow NBX systems to establish IP connections to other
H.323-equipped PBXs as well as to similarly equipped NBX systems.
Although H.323 standards describe a universally accepted interface for
interconnecting similar systems, each of the 20 or 30 PBX manufacturers
brings its own PBX solution to the marketplace. This complexity is further
increased by the diversity of products and release levels that are
associated with each manufacturer. Because any implementation
differences can affect connectivity, this manual can only offer guidelines
for connecting NBX and PBX systems.