status.i4.v = ntv_send_request(node.i2.v, task_name.i4.v,
				       request_flags.i2.v, request_buffer.i2a.r,
				       request_length.i2.v, request_id.u2.r,
				       reply_buffer.i2a.r, reply_length.i2.v,
				       [event_flag.i1.v], [ast_func.f.r])

	Send a request message.

	node		destination logical trunk and node. A zero value
			implies the LOCAL node.  The trunk (also known as
			the LAN id) is stored in the upper byte of this word.

	task_name	destination network task name.  A zero value
			implies the caller's task name.

	request_flags	request flags: A zero value implies no flags set.
			This is a structure of type REQUEST_OPTION_FLAGS.
			(REQ_M_MULTRPY -> multiple-reply request,
			 REQ_M_NOBSYWT -> do not queue request to busy task,
			 REQ_M_FCPAST  -> enable first packet reply ASTs)

	request_buffer	the user's request message data.

	request_length	length of the request message data (in words).

	request_id	word in which the request identification code
			is returned.

	reply_buffer	buffer to receive the reply message(s).

	reply_length	length of the reply buffer (in words).

	[event_flag]	event flag to be set when the reply is received (if

	[ast_func]	user AST routine to be called when a reply is received.
			The AST parameter is a pointer to a structure of
			type UAB_REPLY.

	status	 VMS completion condition code.

	This function returns status values as follows:

	SS__NORMAL	success, request sent or queued for transmission
	SS__ACCVIO	word for request id not specified
	SS__EXQUOTA	AST quota exhausted
	SS__ILLEFC	illegal event flag number
	SS__INSFARG	insufficient number of arguments
	SS__INSFMEM	insufficient dynamic VMS memory for AST
	SS__INTERLOCK	error, XMTWT or RQB's MODLOK bit is already set!
	SS__NONEXPR	non-existant network process
	SS__NOSUCHNODE	no such destination logical node known
	SS__SSFAIL	XSC block does not exist
	SS__VECINUSE	block/buffer pointer save vector in already use
	SS__UNASEFC	process not associated with event flag cluster
			with the specified event flag number
	NET__BUGCHECK	internal network error
	NET__NOBUFFER	no free buffers available
	NET__NOCTLBLK	no free control blocks
	NET__NOMSG	no message buffer (or length of 0) specified
	NET__NORPYBUF	no buffer for reply specified
	NET__NOTCNCT	not connected to network
	NET__REQTBLFUL	no free request indices
	NET__TOOLONG	message too long

	This function requires the following include files:

	acnet_h, ssdef_h

	Related functions:

	acnet_send_wait, ntv_wait_reply, ntv_send,
	ntv_cancel_request, ntv_receive_reply