Packet Network Configuration - Paradyne Jetstream CPX-1000 Installation And Operation Manual

1. Voice-over-Broadband Networking
Packet
Network
Configuration
Phone Sys
LAN
Phone Sys
LAN
Phone Sys
LAN
Phone Sys
LAN
Subscribers
1-4
The CPX-1000 transports voice traffic via an ATM network. When
Frame Relay is used, the frames are encapsulated in ATM cells.
In the packet network
a minimum of two Permanent Virtual Circuits (PVCs) across the
network for each IAD (in both ATM and Frame Relay networks).
The first PVC transports the voice and management traffic
associated with all of the subscriber's telephone lines. The
voice PVC is configured as a variable bit rate-real time
(VBR-rt) PVC, and has priority over the data PVC.
The second PVC transports the data traffic. The data PVC is
typically set up as an unspecified bit rate (UBR) PVC.
Local
Loop
I AD
ATM
Access
MUX
I AD
ILEC CO
I AD
Frame
Relay
Access
MUX
I AD
ILEC CO
Figure 1–3. VoBB Network Configuration
(Figure 1–3), voice-over-broadband requires
Class 5
CPX-
Voice
1000
Switch
Packet
Switch
Voice
DLCI
FRF8
IWF
Data
DLCI
ICP RSC
1000-A2-GN22-00
PSTN
Internet
0250
February 2003