![]() ![]() Each HWY consists of 30 user channels (B-channels), one signalling channel (D-channel) and one synchronization channel with 64 kbit/s each. The transmission bandwidth is 2 x 2048 kbit/s (2 HWYs). S2M = Exchange trunk connection Da2M = digital tie-line (public network) S2 = digital tie-line (private networks) for connection to HOST, SERVER, GATEWAY.įor failure protection reasons, the two links on the same board should not be routed to the same partner. The DIUS2 (S2 interface for 4-wire line) is installed in the LTU in a peripheral board slot with an uneven number, since the slot immediately adjacent to it is also used. The digital DIUS2 board is used for connections to public ISDN networks and for networking Hicom systems. Signalling comprises 30 B-channels, 1 D-channel and 1 synchronization channel per path. ![]() Transmission rate: 2048 kbit/s, coding: HDB3. Transmission rate: 2048 kbit/s, coding: HDB3 The DIUS2 (Digital Interface Unit ISDN) implements two S2 primary rate access (PRA) interfaces in the Hicom 300 system according to CCITT: ![]()
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