This is a benefit of the hardware client. Because the passwords are saved on this version of the Cisco VPN 3002, the authentication is automatic and does not require human intervention to authenticate. Only a single network is allowed on the Cisco VPN 3002. The Cisco VPN 3002 is a client. It scales to large numbers very easily because it uses push policy and dynamic address assignment, and has few parameters.
Configuration is more difficult, and there are many more parameters.
Configuration must be manually performed at the remote and central sites. The Nortel product includes WAN options not available with the Cisco VPN 3002. The Cisco VPN 3002 supports digital certificates and preshared secrets. These will be supported in the next version. If the Cisco VPN 3002 is connected to a modem, remote users can connect remotely to configure it.