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bubblestar

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發表於 2010-6-14 11:40 | 顯示全部帖子
How to add a cellular trunk to your VoIP system - Part 1 (3 pages)

How to add a cellular trunk to your VoIP system - Part 2 (5 pages)

PORTech Illustrated examples for 1 port, 2 ports, 4 ports, 8 ports triband/quad-band models of GSM gateways

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bubblestar

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發表於 2010-9-10 15:02 | 顯示全部帖子
OpenBTS – 打造山寨版GSM系統

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