L3 D Channel Control (0x000A) Atomic Functions

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This section includes the atomic functions and events for the ISDN PPL component, L3 D Channel Control.

L3 D Channel Control Atomic Functions

The following Atomic Function supports congestion control functionality to the ISDN PRI card. See Common Atomic Functions in the Chapter 2 for the AFs common to all PPL components.

AF Number	72
Name	Test Congestion Control Thresholds
Description	Tests for congestion. If call averages or burst have been exceeded alarm messages are sent to the host.
Arg1	N/A
Arg2	N/A

The following Atomic Functions support QSIG/PSS1 Basic Call Signaling functionality. See Common Atomic Functions for the AFs common to all PPL components.

AF Number	74
Name	REASSEMBLY: Validate First Segment
Description	Verifies Segment Message is received in the Reassembly Null state
Arg1	<Not Used>
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if valid Segment Message PPLevINT_EVENT_0 if otherwise

AF Number	75
Name	REASSEMBLY: Respond to Invalid First Segment
Description	Depending on call state and configuration byte, responds with STATUS/STATUS_ENQUIRY or RELEASE_COMPLETE message to invalid First Segment
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	76
Name	REASSEMBLY: Test Message Type
Description	Checks whether the message type is SEGMENT or not
Arg1	<Not Used>
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if message type is SEGMENT PPLevINT_EVENT_0 if message type is not SEGMENT

AF Number	77
Name	REASSEMBLY: Validate Subsequent Segment
Description	Verifies Segment Message received in Reassembly Active state
Arg1	<Not Used>
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if valid Segmented Message PPLevINT_EVENT_0 if otherwise

AF Number	78
Name	REASSEMBLY: Store Call Request, Segment Message type, number of segments remaining
Description	Stores important data about the current reassembly process
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	79
Name	REASSEMBLY: Accumulate segment in buffer
Description	Adds the segment to the reassembly buffer
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	82
Name	REASSEMBLY: Test number of segments remaining
Description	Checks if there are more segments to come
Arg1	<Not Used>
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if this is last segment PPLevINT_EVENT_0 if more segments are expected

AF Number	83
Name	REASSEMBLY: Store number of segments remaining
Description	Stores number of remaining segments
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	84
Name	REASSEMBLY: Assemble, reorder and send
Description	Reorders the IEs in the buffer, so that important IEs come first. It then sends the IEs to L3 Call Reference, first as a normal call processing message with a Segmented Message IE, followed by segmented messages.
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	85
Name	REASSEMBLY: Send to L3 Call Reference
Description	Sends the message to L3 Call Reference
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	86
Name	REASSEMBLY: Discard accumulated segments
Description	Discards the segments in the reassembly buffer
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	87
Name	SEGMENTATION: Test for valid SEGMENT message
Description	Checks whether message is a valid SEGMENT message
Arg1	<Not Used>
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if message is a valid SEGMENT message PPLevINT_EVENT_0 if otherwise

AF Number	88
Name	SEGMENTATION: Test for Segmentation Data in message
Description	Checks whether the message contains Segmentation Data
Arg1	<Not Used>
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if Segmentation Data is present PPLevINT_EVENT_0 if otherwise

AF Number	89
Name	SEGMENTATION: Verify Segmentation Data
Description	Tests the validity of Segmentation Data
Arg1	<Not Used>
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if Segmentation Data is valid PPLevINT_EVENT_0 if otherwise

AF Number	90
Name	SEGMENTATION: Store Call Request, Segment Message type, number of segments remaining, add to buffer
Description	Allocates the memory buffer for this segmentation, stores important data, converts call processing message to Segment Message, adds to buffer
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	91
Name	SEGMENTATION: Store number of remaining segments, add to buffer
Description	Stores the new number of segments remaining, adds the segment to buffer
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	92
Name	SEGMENTATION: Discard segments
Description	Frees the allocated buffer and discards the received segments
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	93
Name	SEGMENTATION: Free segmentation buffer for all channels
Description	Frees the allocated buffer and discards the received segments for all channels
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	94
Name	SEGMENTATION: Test number of segments remaining
Description	Checks if there are more segments to come
Arg1	<Not Used>
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if this is last segment PPLevINT_EVENT_0 if more segments are expected

AF Number	95
Name	SEGMENTATION: Set segmentation state
Description	Sets the segmentation state for the current B channel
Arg1	State (0/1)
Arg2	<Not Used>

AF Number	96
Name	SEGMENTATION: Send accumulated segments and discard them
Description	Sends the segments in the buffer to L2 and frees the buffer
Arg1	<Not Used>
Arg2	<Not Used>

AF Number	97
Name	SEGMENTATION: Test segmentation state
Description	Tests the segmentation state for the current B channel
Arg1	State (0/1)
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if Arg1 is equal to the segmentation state PPLevINT_EVENT_0 if otherwise

AF Number	98
Name	SEGMENTATION: Test Segment Message type and Call Reference
Description	Tests the Segment Message type for validity
Arg1	State (0/1)
Arg2	<Not Used>
Results	PPLevINT_EVENT_1 if message is not a SEGMENT message and has a different Call Reference from the current reassembly PPLevINT_EVENT_0 if message is a SEGMENT message or not a SEGMENT message, but has the same Call Reference from the current reassembly

AF Number	99
Name	Send DSM Segmentation Event to L3 Call Reference
Description	Send Segmentation Event Indication through L3 Call Reference to host
Arg1	Event (1:3)
Arg2	<Not Used>

L3 D Channel Control L3/L5 Events

PPL Event Request (L5 to L3)	PPL Event Indication (L3 to L5)
0x0001 Manual D Channel Switchover *	0x0001 D Channel Active * 0x0002 D Channel Standby * 0x0003 D Channel Not Aligned *
* Applies to D channel Backup only.