Paradyne Jetstream CPX-1000 Installation And Operation Manual page 17

1000-A2-GN22-00
CPX-1000
Voice Services
Platform
February 2003
The heart of our VoBB solution is the CPX-1000. IADs, supplied by
other manufacturers, reside at subscriber premises. Each IAD
provides dial tone to standard (POTS) local telephones and data
service, using a single transmission link.
The network architecture provided by the CPX-1000 enables ICPs
to extend local dial tone services from an existing Class 5 switch
over a packet-based access network. From this perspective, as a
loop extender, voice-over-broadband is functionally similar to
traditional Digital Loop Carrier (DLC) equipment, where the Class
5 switch provides the actual dial tone, as well as Custom Local
Area Signaling Services (CLASS) and calling features.
However, unlike traditional DLCs, which supply the physical
subscriber line interface at the central office, the packet architecture
places that interface at the subscriber premises.
The benefits of this architecture are:
better voice quality, by performing analog-to-digital
conversion near the phone
more efficient use of copper connections between the
subscriber premises and the Class 5 switch
The CPX-1000 supports any broadband access network technology,
including voice-over-T1, voice-over-DSL, and voice-over-wireless
local loop (Figure 1–1
The CPX-1000 is a carrier-class, rack-mounted shelf with
redundant components.
The CPX-1000 incorporates a scalable architecture within a single
shelf, or by using multiple CPX shelves.
A single shelf can support additional subscribers by adding
more network modules or using the spare capacity of
existing network modules.
Multi-shelf equipment is comprised of more than one CPX
when the capacity of a single shelf is exceeded.
Most shelf components are modules comprised of a line card and a
transition card. The line card installs in the front of the CPX and
the transition card installs in the rear. A passive midplane within
the CPX shelf connects the line modules and transition modules.
1. Voice-over-Broadband Networking
on page 1-2).
1-3