Polycom RMX 1500 Administrator's Manual page 761

15 To specifically define one or more valid terminals, ensure that the
Accept SNMP Packets from any Host option is cleared and then click the
Add button.
The Accepted Host IP Address dialog box opens.
16 Enter the IP Address of the Manager terminal from which valid
queries may be sent to the MCU, and then click OK.
Click the Add button to define additional IP Addresses.
The IP Address or Addresses are displayed in the Accept SNMP Packets
from These Hosts box.
Queries sent from terminals not listed in the Accept SNMP Packets from These
Hosts box are regarded as a violation of the MCU security, and if the Send
Authentication Trap check box is selected, an appropriate message will be sent
to all the terminals listed in the SNMP Properties – Traps dialog box.
17 In the RMX - SNMP Properties - Security dialog box, click OK.
Polycom RMX 1500/2000/4000 Administrator's Guide
19-97