The Read Only DSA NSAPs attribute identifies one or more DSAs
 that  are allowed to contact this DSA and perform interrogations
 on behalf of their users. Each DSA is represented by the NSAP
 value of its  presentation address.

 Syntax:

 	SET DSA READ ONLY DSA NSAPS {<address>, ....}

 where <address> is the NSAP address, for example:

 	SET DSA READ ONLY DSA NSAPS {%x49002aaa00040008aa21}

 You can specify the leading characters of an NSAP to indicate
 that read-only access is allowed for any DSA using an NSAP
 beginning with that sequence of characters. For example:

 	SET DSA READ ONLY DSA NSAPS {%x49002a}

 The default value is an empty list of NSAP addresses, indicating
 that all NSAPs are allowed. If the attribute specifies one or more
 NSAPs, then only DSAs using those NSAPs are allowed to perform
 interrogations of this DSA.

 Note that the DSA refers to the value of this attribute
 whenever it receives a new connection. Once a connection is
 established, the caller is treated as a read-only DSA for as
 long as the connection lasts. Changing the value of the
 attribute has no effect on existing connections, only on
 subsequent connections.