Technology

Physical infrastructure
The backbone of the SANET network is built on the Ethernet technology with transmission speed 1 Gbps. Some parts where was not possible to lease dark fibers are connected with the nearest access point through leased digital circuit.

The basis of the gigabit infrastructure are single mode dark fibers leased among cities. In the cities, SANET built up its own optical trunks terminated at SANET PoPs in Cisco Catalyst 6509 Gigabit Ethernet switches with GBIC long distance interface (up to 100 km).

SANET use regenerators of optical signal to reach longer distance. For this purpose, SANET has used Cisco Catalyst 3524 swithes with fixed 2Gb ports and 24 x 10 / 100 Mbps.

Network topology
When the development of the backbone network is finished, SANET will have optical ring infrastructure which will be connected in the middle-between Zvolen and Banská Bystrica. If any segment is physically interrupted, the operation of the network will be redirected through the nearest node on the opposite end. High renundancy and reliability of the operation will be ensured.

Internet infrastructure
From the protocol point of view, the SANET2 network represents one ethernet segment where the middle is in Bratislava. The distance among all nodes is the same - 1 hop. This solution enables us to create L2 networks for the specific applications, for example IPv6, VoIP or for the testing purposes.

Connection to the backbone network
Connection with the SANET members is realized by:

1. Ethernet technology 10 or 100 Mbps based on optical fibers or metallic line 10/100 Base - T
2. Microwave connection using the common band 2,4 GHz
3. Digital circuit
4. dial - IP connection (analog or ISND)