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| ISDN user-network interface structure; channel structure; interface structure | |||
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structure d'interface usager-reseau : 5 a las frases, 2 temas |
| Comunicaciones | 4 |
| Telecomunicación | 1 |
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| |||
| ISDN user-network interface structure; channel structure; interface structure | |||
|
structure d'interface usager-reseau : 5 a las frases, 2 temas |
| Comunicaciones | 4 |
| Telecomunicación | 1 |