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    <blockquote
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                <div>If you have no NAT or dynamic IP in your network,
                  you can just remove the registration process and
                  assign to each peer its IP address.</div>
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            <div style="">This is the answer. If 100% availability is
              critical, your IP addresses shouldn't be changing anyway,
              so take the registration process out entirely.&nbsp;</div>
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    This advice is not valid for android / iphones though. You need the
    register to be able to have good battery life on those.<br>
    <br>
    If you use TCP, the softphone will go to sleep, OS will keep the
    stream alive. When a SIP packet comes in (INVITE, OPTIONS etc), the
    OS will wake up the softphone and the softphone will handle the
    packet.<br>
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    No register means no stream and the softphone will just sleep
    forever.<br>
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    Z<br>
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