Zhone 2000 ユーザーガイド

Type the option of the control mode to set. The IAD saves the mode you’ve 

selected and redisplays the menu.

Press Escape to return to the Voice Configuration menu and continue with 

other voice path configuration.

To communicate over WANs, end-user stations and the network cloud have typ-
ically been required to use the same type of transmission protocol. This limita-
tion has prevented different network protocols such as Frame Relay and ATM 
from being linked. However, the High POTS Port IAD’s Frame Relay-to-ATM 
Network/Service Interworking (FRF.5/FRF.8) feature allows Frame Relay and 
ATM networks to exchange data, despite differing network protocols. The func-
tional requirements for linking Frame Relay and ATM networks are provided by 
the Frame Relay/ATM PVC Network/Service Interworking Implementation 
Agreement specified in Frame Relay Forum (FRF) document numbers FRF.5. 
and FRF.8. Before setting the interworking options, you must first configure the 
Frame Relay options for the USI port, and the ATM options for the WAN port.
Interworking can be configured to support FRF.5 or FRF.8 and will support a 
maximum of four VCs. When FRF.5 or FRF.8 interworking is configured on 
a PVC or DLCI, it is switched at the Layer 2 level. Data does not go up the 
IP or bridge stacks, so configuring bridging or an IP address on an 
interworked PVC or DLCI is not possible. FRF.8 Frame/ATM service 
Interworking maps Frame datalink connection identifiers (DLCIs) to ATM 
permanent virtual circuits (PVCs). FRF.5 provides network Interworking 
functionality that allows Frame Relay end users to communicate over an 
intermediate ATM network.