Depends on the network, but we use private IPs on the eMTA side of the CM.

Frank

-----Original Message-----
From: Alexander O. Yuriev [mailto:alex-lists-na...@yuriev.com] 
Sent: Thursday, March 03, 2011 2:48 PM
To: nanog@nanog.org
Subject: Re: What vexes VoIP users?

> There's no particularly good reason that a VoIP-over-cable system
> shouldn't be able to hand off calls to an arbitrary SIP device.

No, there's no particulary good technological reason why VOIP-over-cable
system shouldn't be able to hand off calls to an arbitrary SIP device. 

The reason is purely business -  it will destroy their own voice service
user base.

Alex



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