Random triples
| Subject | Object |
|---|---|
| gptkb:ISDN | 23 B channels + 1 D channel (North America) |
| gptkb:Integrated_Services_Digital_Network_(ISDN) | 30 B channels and 1 D channel (Europe) |
| gptkb:Integrated_Services_Digital_Network_(ISDN) | 23 B channels and 1 D channel (North America) |
| gptkb:ISDN | 30 B channels + 1 D channel (Europe) |