Paradyne CPX-1000 manual Packet Network Configuration

1. Voice-over-Broadband Networking 1000-A2-GN22-00

Packet

Network

Configuration

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 (Figure 1–3), voice-over-broadband requires a minimum of two Permanent Virtual Circuits (PVCs) across the network for each IAD (in both ATM and Frame Relay networks).

Phone Sys

I AD

LAN

Phone Sys

I AD

LAN

Phone Sys

I AD

LAN

Phone Sys

I AD

LAN

Subscribers

Local￿	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.
Loop
￿	ATM
	Access		CPX-	Class 5
	MUX
		Voice		Voice	PSTN
			1000
				Switch
		Data
		PVC
	ILEC CO	PVC
			Packet		Internet
			Switch
					0250
	Frame	Voice
		DLCI	FRF8
	Relay
	Access	Data	IWF
	MUX
		DLCI

ILEC CO ICP RSC

Figure 1–3. VoBB Network Configuration

1-4 February 2003