| |
| 2007 | ||
|---|---|---|
| 6 | Robert Sparks: SIP/VoIP. LISA 2007 | |
| 5 | EE | Robert Sparks: VoIP with NATs and Firewalls. LISA 2007 |
| 4 | EE | Robert Sparks: SIP: basics and beyond. ACM Queue 5(2): 22-33 (2007) |
| 2006 | ||
| 3 | Robert Sparks: VoIP. LISA 2006 | |
| 2005 | ||
| 2 | Robert Sparks: VoIP. LISA 2005 | |
| 2004 | ||
| 1 | Robert Sparks: VoIP and IETF Standards. LISA 2004 | |