Choose the element that differentiates the Cisco SBCS solution from the competing Avaya IP Office and Nortel BCM 50 solutions.（）
- A、SBCS providesPoE through a modular upgrade.
- B、SBCS supports more analog trunks than the competitors.
- C、Only SBCS provides bundled conference calling.
- D、Only SBCS provides a wireless option.
正确答案:D
答案解析:有
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