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Old 12-14-2009, 02:32 PM   #4 (permalink)
Thumbs Must Hurt
Join Date: Dec 2009
Location: DC
Model: 9700
Carrier: T-mobile
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I work with a tech network crew at work. They block all but certain MAC addresses of devices that want to connect. They want no VOIP or UMA going over the lines. When you can't connect? Sometimes those networks don't want voice going over them (they can block this)
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