This is used when a central Internet-VPN access from the customer or other SPoA access with NAT-functionality exists,

Own SPoA-Router with OpenScape 4000: When no SPoA exists in a customer network, the SPoA must be ordered as an extra. In this case the Huawei AR 18-35 Router respectively Cisco 836 is released and delivered. For IM countries who have no ISDN availability, an analog capable router can be used in the future (approximately 03.06).