Avaya 4600 Series Administrator's Manual page 45

As of Release 2.3, 4600 Series H.323 IP Telephones support signaling channel encryption
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while registering, and when registered, with appropriately administered Avaya Media
Servers.
As of Release 2.0, a 4600 Series IP Telephone's response to SNMP queries is restricted to
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only IP Addresses on a list you specify.
As of Release 2.0, an SNMP community string is specified for all SNMP messages sent by
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the telephone.
As of Release 1.8, dialpad access to Local Administration Procedures, such as specifying
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IP Addresses, is restricted by a password.
Dialpad access to most Local Administration Procedures was removed.
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The end user's ability to use a telephone Options application to view network data is
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restricted.
Suggestions for Installation and Configuration
Issue 5 November 2006 45