This OID controls whether incoming setup messages from the data terminal equipment (DTE) are allowed to initiate switched virtual circuit calls to the frame relay network; when enabled, outgoing call requests are blocked at the source. Network engineers set this to restrict which devices on a channel can originate calls, typically to prevent unauthorized or accidental connection attempts. For example, setting this to 'disabled' allows call setup messages to flow normally, while 'enabled' blocks all outgoing SVC requests regardless of destination.