CableLabs (www.cablelabs.com) successfully completed a PacketCable 2.0 SIP call over IPv6 during a two-week IPv6 interoperability event Oct. 11-22. This was the fourth in a series of semi-annual IPv6 interoperability events. Representatives from 17 companies worked together to test IPv6 interoperability in DOCSIS 3.0 cable modems, DOCSIS 2.0+IPv6 modems, CMTSs, PacketCable E-DVAs, e-set-top boxes, provisioning servers, home gateways, large-scale NAT servers, and test tools.Companies that participated in the interop included A10, Arris, Broadcom, Cisco, Comcast, Cox, D-Link, Incognito, Motorola, SCTE, Shenick, Spirent, STMicroelectronics, Technicolor, Texas Instruments, Ubee, and University of New Hampshire Interop Lab.Participants also tested DOCSIS IPv6 provisioning, Internet video streaming, eRouter and standalone home router configuration, and interoperability with PCs running Windows XP, Windows 7, Mac OS X, and Linux.