Paradyne CPX-1000 manual 1000-A2-GN22-00

1000-A2-GN22-00 2. CPX-1000 Voice Services Platform Description

all signaling to both the TMC process and the CP. The PSTN interface controls all time slot mapping and CP functions.

The PSTN routes all voice timeslots over the voice bus to the packet interface.

The Voice Processing function switches individual timeslots between the TDM (T1/STS-1) ports and the voice bus. The Voice Processing function maps all incoming and outgoing voice data streams.

Packet Interface The packet interface physically connects the CPX shelf to the packet network. The interface provides TDM data transport services over ATM using standard ITU and ATM Forum-compliant communications protocols.

This interface converts the information on the Bearer Bus to standard ATM cells and transmits these cells on the packet network. It also converts packet cells to voice timeslots. The Voice/Control Splitter directs the ATM cells (which contain call control and signaling) through the IAD Signaling and Connectivity function to the Call Processor Engine.

The CPX supports up to 4,096 unique PVCs (each representing one IAD). Each PVC (i.e., IAD) has a unique VPI and VCI assigned to it. The CPX supports 256 VPIs in the range of 0 to 255. IADs can be provisioned on any of these VPIs. The permissible range of VCIs per VPI is 0 to 1023. The maximum number of VCIs per VPI can be configured as one of five possible settings when the equipment is initially configured. The possible settings are:

1,024 (default)

512

256

128

￿64

Selection of the maximum of VCIs is determined by the network planner for what best fits the network topology.

In order to afford the maximum number of PVCs available from the CPX, IADs can be organized into IAD Groups. Groups are logical entities where IADs meet these criteria:

	￿	provisioned with differing VPIs but the same VCI
February 2003		2-7