The Neilson Farm has tried, without success, to use both Cisco fax relay and T.38 faxing services with Cisco Unified CallManager Express. The only faxing service that seems to work is fax pass-through. Which port type is connected to their fax device?（）
- A、FXO
- B、FXS
- C、ATA
- D、FAX
- E、E&M
正确答案:C
答案解析:有
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