Cisco Packet Telephony Center

• Cisco PTC 3.1 Release

• Cisco PTC - VS, Release 3.0
  3.0 Cisco PTC:VS

• 2.1.1 Cisco Packet Telephony Center Release
  Cisco PTC 2.1.1 Release

• 2.1 Cisco Packet Telephony Center
  Release 2.1 Cisco PTC

• Cisco Packet Telephony Center, 2.0