Polycom RealPresence 1500 Administrator's Manual page 516

16 Click the Security tab.
(This tab is only displayed if the SIP Server field in the SIP Servers tab is set to Specify.)
17 Modify the following fields:
Default IP Network Service – Security (SIP Digest)
Field
SIP Authentication
User Name
Password
Polycom®, Inc.
Description
Click this check box to enable SIP proxy
authentication.
Select this check box only if the authentication is
enabled on the SIP proxy, to enable the Collaboration
Server to register with the SIP proxy. If the
authentication is enabled on the SIP proxy 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 SIP proxy.
Enter the user name the Collaboration Server will use
to authenticate itself with the SIP proxy. This name
must be defined in the SIP Proxy.
Enter the password the Collaboration Server will use
to authenticate itself with the SIP proxy. This
password must be defined in the SIP proxy.
IP Network Services
These fields can
contain up to 20 ASCII
characters.
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