The 9th SIP Interoperability Test Event took place December 2-7, 2001 in San Diego, hosted by Nuera.
About 106 engineers from the following 40-some companies attended:
| Alcatel |
| Alcatel Business Systems |
| Aravox Technologies |
| aTelo, Inc. |
| Avaya Communication |
| Broadcom |
| Cisco Systems |
| Compaq Computer Corp. |
| Data Connection Ltd |
| Dataflex |
| Delta Information Systems |
| dynamicsoft, Inc |
| Elesign Inc. |
| Ericsson Finland |
| France Telecom R&D |
| IBM CRL |
| Indigo Software |
| ipDialog, Inc. |
| Jasomi Networks |
| Laboratory Telecommunication Sciences |
| LG Electronics Inc. |
| LG Electronics Institute of Technology |
| Lucent Technologies |
| Lucent Technologies - OPENet Solutions |
| Lucent Technology/eServices Group |
| MailVision |
| MicroAppliances |
| Microsoft |
| Mockingbird Networks |
| Net Brahma Technologies Pvt. Ltd. |
| net.com |
| NetNumber |
| Nokia Research Center |
| Nortel |
| Nuera Communications, Inc. |
| Pingtel Corp. |
| RADCOM |
| Radvision |
| Siemens |
| snom technology AG |
| Sunrise Telecom |
| Trillium Digital Systems |
| Valence Semiconductor |
| vovida.org |
| voxeo |
| Voyant Technologies |
| Wind River |
| WorldCom |