ADC SWD4573I1 Manuale Utente

The following illustration shows an example of a configured PVC, including the specific VPI 
and VCI values associated with each segment of the connection.

ATM PVCs can also be set up to run bridging, routing or brouting sessions. See 

 (command-line interface) or 

 (Web interface) for information about setting up 

and running bridging, routing, and brouting sessions over ATM PVCs.

Frame relay interworking allows frames to be transported by an ATM network to an ATM 
device or another frame relay device. Use frame relay with the IDSL frame-based card that 
attaches to modems using frame relay protocol. There are two standards for interworking:

FRF.5 defines how frames are encapsulated so that they can be carried by the ATM network 
to another frame device.

FRF.8 defines how frames are translated between ATM and frame devices.

To set up frame relay services:

Configure service for each IDSL frame card port (includes selecting the IDSL card transmit 
clock source, and the IDSL line profile and IDSL alarm profile for each port). 

Configure the frame relay link for each port, which involves setting the LMI (Local 
Management Interface) parameters. The LMI type defines the method of exchanging status 
information between the customer device and the network. The available LMI types are 
LMI Rev-1, ITU 0.933 Annex-A, ANSI T1 617 Annex-D, and no LMI support.

Cross-connect

PVC

VPI-0

VCI-100

VPI-250
VCI-300

VPI-250
VCI-300

VPI-0

VCI-100

OC3

card

ATM

Network

Access

Provider

Cell-Based ADSL

Channel Card

Network-side VPI/VCI values

are obtained from ATM

network access provider

Subscriber VPI/VCI values

are obtained from

ADSL access provider

Ports are mapped

to same VPI/VCI

VPI/VCI is mapped

to continue to next

network segment

Ports are mapped

to same VPI/VCI

Megabit Modem

700F
600F
500L