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ckleea

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發表於 2011-9-23 20:08 | 顯示全部帖子
Yes. A large difference.

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ckleea

Rank: 1
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發表於 2011-9-25 17:08 | 顯示全部帖子
Small number of users will not have problems but for large companies, it is essential. However now you see hardware EC on ISDN or E1 lines, etc Less in analog card

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