A long distance phone company can provide ANI which may arrive over the D channel of an ISDN primary rate interface circuit or via a dedicated single line before the first ring.
英
美
- 美国有各种ANI,长话公司能提供ANI,它可在ISDN基本速率接口电路的D信道上到达,或在首次振铃之前通过专用线到达。