System information

Integrating Polycom® HDX® Systems with UNIFY® OpenScape®
Polycom, Inc. 38
○ Display H.323 Extension Check this option to enter H.323 extensions separately from the
gateway ID on the Place a Call screen. If your system is registered with a gatekeeper, your
H.323 extension displays on the home screen. If you do not check this option, you can make
gateway calls by entering the call information in this format:
gateway ID + ## + extension .
○ H.323 Name Enter the name that gatekeepers and gateways use to identify this HDX system.
You can make point-to-point calls using H.323 names if both systems are registered to a
gatekeeper. The H.323 name is the same as the System Name, unless you change it. Note that
your organization may use a dial plan that defines the names you can use. Note that your
organization may use a dial plan that defines the names you can use.
○ H.323 Extension (E.164) Entering an extension in this field enables you to place point-to-point
calls if both systems are registered with a gatekeeper, and specifies the extension that
gatekeepers and gateways use to identify this system.
○ Use Gatekeeper A gatekeeper manages functions such as bandwidth control and admission
control. The gatekeeper also handles address translation, which enables users to make calls
using static aliases instead of IP addresses that may change each day. You can choose from
the following options:
» Off Calls do not use a gatekeeper. If you choose Off, the Primary Gatekeeper IP Address
field is not displayed.
» Auto This option causes the HDX system to attempt to automatically find an available
gatekeeper.
» Specify When you choose this option, calls you dial use the gatekeeper you specify in the
Primary Gatekeeper field. You must choose Specify to enable H.235 Annex D Authentication.
» Specify with PIN Choose this option to use the E.164 address you specify in the H.323
Extension (E.164) field. Calls you make using this option require an authentication PIN. Note
that gateways and gatekeepers are required for calls between IP and ISDN.
○ Authentication Check this option to enable support for H.235 Annex D Authentication. When
you enable this option, the H.323 gatekeeper ensures that only trusted H.323 endpoints are
allowed to access the gatekeeper. The following fields display when you enable Authentication:
» User Name Specify the user name for authentication with H.235 Annex D.
» Password Specify the password for authentication with H.235 Annex D.
 Current Gatekeeper IP Address This field is not configurable and displays the IP address that
the HDX is currently registered to.
 Primary Gatekeeper IP Address The primary gatekeeper IP address contains the address with
which the system registers. As part of the gatekeeper registration process, the gatekeeper might
return alternate gatekeepers. If communication with the primary gatekeeper is lost, the HDX system
registers with the alternate gatekeeper but continues to poll the primary gatekeeper. If the system
reestablishes communications with the primary gatekeeper, the HDX system unregisters from the
alternate gatekeeper and reregisters with the primary gatekeeper. Note that this field does not
display if you chose Off in the Use Gatekeeper field.
○ If you chose to use an automatically selected gatekeeper, this field displays the gatekeeper’s IP
address.
○ If you chose to specify a gatekeeper, enter the gatekeeper’s IP address or name (for example,
gatekeeper.companyname.usa.com, or 10.11.12.13).