В реадми в разделе интродакшн написано след:
The Contivity VPN Client is a Windows application that lets you create and store connection information for tunneling into a Contivity VPN Switch connected to a remote corporate network. The Contivity VPN Client uses the IPsec protocol with the ISAKMP/Oakley Key Exchange protocol to authenticate and secure an end-to-end connection into a remote network.
Вид авторизации: Group Security Authentication
На сайте нортела есть софтина, но она триальная.
спасибо!