| 摘要 |
A communication network includes a serving switch that receives a directory assistance call. In response to receipt of the directory assistance call, the serving switch signals, via an out-of-band signaling link, to initiate reservation of a call path for the directory assistance call in a telephony network, where the call path includes a circuit loop at the serving switch. In response to reservation of the call path, the serving switch establishing a voice connection via the reserved call path in the telephony network to permit provision of directory assistance services.
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