3Com NBX 100 Administrator's Manual - page 432
432
A
PPENDIX
D: C
ONNE
X
TIONS
H.323 G
ATEWAY
NetMeeting Connections
You can also check H.323 voice packets that are sent between systems
that are running Microsoft NetMeeting. ConneXtions software requires it
to run G.711 (CCITT mu-law) or G.723.1 compression. NetMeeting is
available on the Resource Pack CD, or it is available as a free download
from
www.microsoft.com
.
You can conduct the NetMeeting connect test from the operating system
that runs the ConneXtions software, or from another PC on the LAN.
You must run NetMeeting and ConneXtions on different PCs.
In addition to the NetMeeting software, participating computers need an
audio card with a headset (or speakers) and a microphone. The audio
card must support full-duplex 64 Kbps transfers.
Note that it is possible for a NetMeeting connection to be unsuccessful
and still have a successful ConneXtions installation. This can occur
because ConneXtions restricts the range of TCP and UDP ports used but
NetMeeting allocates its ports from a wider pool. For more information,
see
“Firewall Security”
on
page 423
. If ConneXtions is installed with a
limited range of allowable ports, and the firewall is configured to pass
only those ports, it is possible that NetMeeting cannot pass a call through
the firewall while the more restricted ConneXtions calls can pass through.
The following procedure uses NetMeeting to test the connection
between the operating system that runs the NBX ConneXtions H.323
Gateway and a remote IP address. This end-to-end NetMeeting check can
help to recognize firewall problems without the complexity of the NBX
system and ConneXtions H.323 server.
To make a NetMeeting check:
1 From the Start menu, select Settings, and then Control Panel.
2 If you are using Windows NT, double-click Services. If you are using
Windows 2000, select Applications, and then Services.
3 Select 3ComConnextions from the list, and click Stop.
4 Access
www.microsoft.com
using a web browser.
a Click Downloads in the navigation bar.
b In the Product Name field, select NetMeeting.