| 摘要 |
<p>Described is a bit oriented digital switch comprising means (SPM1, ..., SPM8; WSW1, ..., WSW8; WCM1, ..., WCM8; WM1, ..., WM8; BSW1, ..., BSW8; BCM1, ..., BCM8; BM) for controlled change of bit position and PCM word of chosen bits and bit groups in PCM words received by the switch. The switch is suitable to combine with a conventional word oriented switch to allow flexible switching of both entire PCM words and parts thereof. This switch also makes it possible to define a digital PCM transmission system, in which PCM words can contain one or several traffic channels and in which traffic channels that occupy a bit group containing at least one bit, but not an entire PCM word, dynamically are allocated necessary space at an arbitrary available location in PCM words.</p> |
