4.17. Using Object Identifiers

Object Identifiers (OIDs) are not free strings, they are standardized and assigned by various controlling authorities such as, the International Telecommunications Union (ITU), British Standards Institute (BSI), American National Standards Institute (ANSI), Internet Assigned Numbers Authority (IANA), International Standards Organization (ISO), and public corporations. Depending on the authority, OIDs use different encoding and decoding schemes. Vendors, companies, governments and others may purchase one or more OIDs to use while communicating with another entity on the network. For more information about OIDs, see http:////www.alvestrand.no/objectid/index.html.

An application may want to convey an OID to the remote side. This can be achieved by setting the OID string in any nonstandard parameter that can be sent in any Setup, Proceeding, Alerting, Connect, Facility, or User Input Indication (UII) message.

Global Call supports the use of any valid OID by allowing the OID string to be included in the GC_PARM_BLK associated with the specific message using the relevant parameter set ID and parameter IDs. Global Call will not send an OID that is not in a valid format. For more information on the valid OID formats see http://asn-1.com/x660.htm which defines the general procedures for the operation of OSI (Open System Interconnection) registration authorities.

The application is responsible for the validity and legality of any OID used.

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