5.2.2 Ethernet 10BaseT interface

The Ethernet interface functions depend on the device operation modes.

Bridge mode

The bridge mode is used to connect LANs. The algorithm of the Ethernet traffic encapsulation into ATM is used in accordance with RFC 1483. The MDS92xxx-10BT device implements both the transparent bridge or spanning tree algorithms. These algorithms are described in detail in “Bridging of local networks”.

Route mode

If the bridge functions are not enough, the MDS92xxx-10BT device can work as a router. The Ethernet traffic is encapsulated in accordance with RFC 1438, RFC 2364, RFC 2516.

The MDS92xxx-10BT device implements static and dynamic routing algorithms. These algorithms are described in detail in “Routing of local networks”.

Note! At the point-to-point connection, both devices must be configured either as bridge or as router.

5.2.3 ATM interface

From side of the G.shdsl line interface, the MDS92xxx-10BT device acts as a SHDSL modem that uses ATM protocol to transmit data. This allows attaching it to DSLAM equipment of different manufacturers.

In the present version of the firmware, ATM implements the following:

•multiprotocol encapsulation of heterogeneous LAN traffic into ATM cells. AAL5 according to RFC 1483;

•support of IP protocols over ATM and PPP over ATM;

•in the router mode there is established one PVC for the bridge (RFC 1483 standard), eight PVCs for IP over ATM, one PVC for PPP over ATM;

•support of QoS elements: UBR, CBR, VBR-nrt;

•ATM UNI interfaces (versions 3.0, 3.1, 4.0)

Version: 1.0

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Black Box Version 1.0 user manual Ethernet 10BaseT interface, ATM interface, Bridge mode, Route mode
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Version 1.0 specifications

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