Packet Interface - Paradyne Jetstream CPX-1000 Installation And Operation Manual

1000-A2-GN22-00

Packet Interface

February 2003
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.
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
2. CPX-1000 Voice Services Platform Description
2-7