| 摘要 |
The board executeas an ISDN subscriber subsystem to a subscriber-network connection function, and supports an ISDN services. The board includes a multi line junction means (21 or 23) which holds bit, and frame synchronous, and exchanges 2B+D channel information, D channel processing means (24,25) which execute a connection function in order to exchange D channel information, a PCM connection means (26) which allocates 0 channel to 15 channel, or 16 channel to 31 channel of PCM highway, a processor control means (27) which executes local loop back and remote loop back, a S-bus connection means (28), and a P-bus connection means (29).
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