Polycom RMX 1500 Administrator's Manual page 985

Optional. Removing the RMX from the Host Authorization List
If you have defined the RMX as Trusted Host to enable dialing using the
Static Routes and you want to use numerical dialing in addition or instead
of SIP URI dialing, you need to remove the current definition of the RMX
and redefine it as a voice gateway.
To remove the definition of the RMX as trusted host from the Front End
Properties:
1 In the OCS application, display the Front End Properties (right-click
the Front End and select Properties).
2
Click the Host Authorization tab.
3
In the Trusted Hosts list, click the RMX entry and then click the
Remove button.
4 Click OK.
Chapter H-Setting the RMX for Integration Into Microsoft Environment
H-17