I have never dealt with the 3-com system but I have heard that is uses a fairly well molested version of sip and has been known to cause problems with sip-endpoints (like ATA's/etc).
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
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