Polycom realpresence 1800 Administrator's Manual page 544

Default IP Network Service – Security (SIP Digest)
Field
H.323 Authentication
User Name
Password
If the Authentication User Name and Authentication Password fields are left empty, the SIP
Digest authentication request is rejected. For registration without authentication, the Collaboration
Server must be registered as a trusted entity on the SIP server.
18 To configure the ICE environment, click the SIP Advanced tab.
Polycom, Inc.
Description
Click this check box to enable H.323 server
authentication.
Select this check box only if the authentication is
enabled on the gatekeeper, to enable the
Collaboration Server to register with the gatekeeper. If
the authentication is enabled on the gatekeeper and
disabled on the RMX, calls will fail to connect to the
conferences.
Leave this check box cleared if the authentication
option is disabled on the gatekeeper.
Enter the user name the Collaboration Server will use
to authenticate itself with the gatekeeper. This name
must be defined in the gatekeeper.
Enter the password the Collaboration Server will use
to authenticate itself with the gatekeeper. This
password must be defined in the gatekeeper.
IP Network Services
These fields can
contain up to 64 ASCII
characters.
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