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International SIP 2004
The following companies and devices demonstrated their interoperability in the test event:
| Participants | Devices |
| Codenomicon Ltd. | SIP Test Tool |
| Hotsip AB | Active Contacts PC
SIP Application Server / Presence Engine |
| Navtel Communications Inc. | InterWatch 95000 and SIP Test Suites |
| snom technology AG | snom 200 / 105 phones
snom SIP 4S Proxy/Registrar Server |
| Spirent Communications | Abacus 5000 |
