Your question about Siemens S30810-Q2096-X DIUS2

The Digital Interface Unit ISDN is a board for Siemens Hicom 300/300E and HiPath 4000 telephone systems. The module implements two DIUS2 Primary Access (PMA)-interfaces S2 in accordance with CCITT. The digital DIUS2 board is used for connections to a public ISDN network and the networking of Hicom systems.