cmgwSignalProtocolVersion 1.3.6.1.4.1.9.9.324.1.1.2.1.3

This object is used to represent the protocol version. For example cmgwSignalProtocol is 'mgcp(2)' and this object is string '1.0'. cmgwSignalProtocol is 'h248(3)' and this object is set to '2.0'.