ACOnet's country-wide carrier network is based on a wavelength transparent fibre optic backbone that allows for multiple transmission paths per route. The ACOnet backbone uses 10 resp. 100 Gbps Ethernet over DWDM technology (DWDM = Dense Wavelength Division Multiplexing).
In 2017, the backbone's topology was adapted to changed requirements. Three new PoPs (Wiener Neustadt, St. Johann/Pongau, and Bregenz) were added. Since this transition was completed, it is possible to directly interconnect ACOnet's PoPs via short links (see Topology). Thus, for example a connection between the cities of Innsbruck and Salzburg no longer needs to take a route via Vienna.
Such cross connections reduce latency and enhance performance among the PoPs; a requirement for traffic-intensive and for real-time applications. Therefore, all the main backbone nodes are outfitted with OADMs (Optical Add-Drop Multiplexers), which facilitate flexible connections.
Joint projects among multiple ACOnet participants can also avail themselves of VPN connections, either as a service on existing ACOnet infrastructure or using dedicated wavelengths. One such case is GovIX, a country-wide peering VLAN for governmental organisations that is operating since 2010. Both IPv4 and IPv6 are available to all ACOnet participants with equal quality of service.
Article on the backbone transition (in German), published in ACOnet's Annual Report 2017:
- ACOnet JB-2017 Backbone.pdf(278 kB)