Configuring DASS2/DPNSS Software

The table below describes the sequence of steps to perform for the system assignment.

Step	Action	Description	Message
1	Assign Spans	Assign all spans to be used for DASS2/DPNSS	Assign Logical Span ID
2	Configure Spans	Configure framing and line coding for all DASS2/DPNSS spans.	E1 Span Configure
3	Assign D Channels	Assign all D channels	D Channel Assign
4	Assign DPNSS as variant	Reconfigure to conform to DPNSS protocol	ISDN Interface Configure
5	Configure PPL	Download and assign custom protocols and perform any timer or Config. Byte modifications required.	See PPL messages
6	Bring All Spans and Channels in Service	Bring spans, B channels, and D channels in service.	Service State Configure

Assign Logical Span IDs to spans on SE1LC cards to be used for DASS2/DPNSS with the Assign Logical Span ID message.

Set the format (E1 Span Configure) of the span on which the DASS2/DPNSS D channel resides. Configure the framing and line coding for all DASS2/DPNSS spans by using HDB3 and Clear Channel.

Assign D channels using the D Channel Assign message. The logical channel must be 30. In order for this assignment to succeed, the SE1LC card on which the D channel is to reside must be in service. The physical span must be assigned. You must specify the slot number of the
DASS2/DPNSS card, as well as the type of primary.

The system software selects the actual D channel resource. If the host attempts to assign a D channel to a DASS2/DPNSS card that already has 32 D channels assigned, the host receives a Response Status of "DASS2 D Channel Exceeds Max" (0xA4). You must indicate another card for D channel processing. All subsequent references to the D channel timeslot use the Logical Span ID and channel specified in the message.

Reconfigure the E1 lines from the DASS2 protocol to conform to the DPNSS protocol with the ISDN Interface Configure message. This step is necessary only if you are using DPNSS.

Important! The value of the Entity field (0x01) indicates that the entity being addressed is the connection type. The value of the Data[1] field (0x0c) indicates that the connection type is DPNSS.

Perform any PPL customization required, including downloading and assigning custom protocols and timer or Config Byte modifications. See DASS2/DPNSS for more information.

When all of the configuration is complete, bring up the D channel and the B channels to establish a connection with the network and then begin call processing. Upon successful establishment, the switch sends the DS0 Status Change message to the host with the status of in-service.

DS0 Status Change messages follow for the B channels (voice/data channels). PPL Event Indication messages are sent for each DPNSS virtual channel that comes into service.

Upon link failure, the switch sends the DS0 Status Change message to the host for the D channel, as well as all of the associated B channels. All channels have an "out-of-service" status and PPL Event Indication messages are sent for all DPNSS virtual channels.

Range of channels provided by T1 or E1 transmission service. A physical span is a group of channels taking up a single physical wire. A logical span is a group of channels taking up less than a single logical wire, or carried over more than one physical wire.

A digital communications link - voice, data, and video at a 2.048 Mbps rate; 30B/2D or 31B/1D (ISDN); non-North American version of T1.

Data channel. One of two fundamental components of an ISDN interface, it provides a path (16Kbps for BRI, 64Kbps for PRI) for carrying control signals and call data in a packet-switched mode.

See Integrated Services Digital Network.

See Programmable Protocol Language.

The condition of a component at a given instant. The current "context" of a PPL object, such as Idle, Seizing, Answered. In PPL files, a State is represented by a circle.

Signaling technique where the full channel bandwidth is used for data transmission, while the framing and control bits (signaling) use a separate channel. No control or signaling is performed on this path. See B8ZS and ZBTSI.

A condition that, when met, drives a state machine from one state to another. A condition that drives a Component out of its current state by invoking an associated primitive.