On 3/3/2011 3:47 PM, Alexander O. Yuriev wrote:
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
PacketCable pre-dates network neutrality discussions in the US, think 1999 for version 1.0 http://www.cablelabs.com/specifications/PKT-SP-TGCP-C01-071129.pdf So we have a working technology that pre-dated significant direct to consumer SIP services. Vonage went direct to consumer in 2002, before that their model was selling to the cable operators.) Now its true there is no technical reason that 3rd party SIP devices couldn't be included in the mix, especially since PacketCable 2.0 moves from MGCP to SIP. However, there is a ton of work to build an interoperable protocol for signaling call setup, AAA, number ports, etc, etc. Integrating 3rd party SIP into the existing PacketCable standards is certainly possible, but who is going to pay for it? I know of no 3rd party VOIP vendors that even want to go down this path. Vonage's technical folks seem quite happy to have a ~60% success rate in my experience troubleshooting networks and Skype seems even more disinterested. I also think you greatly over estimate the amount of concern generated by MagicJack, Skype, Vonage, et al. -- Scott Helms Vice President of Technology ISP Alliance, Inc. DBA ZCorum (678) 507-5000 -------------------------------- http://twitter.com/kscotthelms --------------------------------