1. Enterprise Infrastructure Solutions for SIP Trunking
Steven Johnson, Ingate Systems

2. Steps to SIP Trunking Basic Requirements: Beyond SIP Trunking:
NAT/Firewall traversal
Interoperability between IP-PBX and Service Provider
Quality of Service (QoS)
Security
Beyond SIP Trunking:
Connecting remote users to the PBX
Secure interoffice connection
WiFi mobile phone communication
Multimedia communication

3. Benefits of SIP Communications
Monthly cost savings
Single network for all communications
Lower cost of Moves, Adds and Changes
Disaster Recovery / Business Continuity
User provisioning
First step in achieving Unified Communications
Voice, Video, IM, Presence, etc.
Remote workers
WiFi mobile phone communication

4. Two Ways to Connect to a SIP Trunk
Over a Managed Line
Over the Public Internet
PSTN
Public Internet
SIP Trunking Provider Network GW
SIP System
Data & VoIP LAN
IP-
PBX
SIP Trunk over Internet
Firewall
PSTN
SIP Trunking Provider Network GW
Public Internet
SIP System
Managed
SIP Trunk
Firewall
IP-
PBX
Data & VoIP LAN

5. SIP Trunking Provider Network
Managed SIP Trunk Connected to Separate Enterprise VoIP LAN in Operator’s Space
SIP Trunking Provider Network
Public Internet GW
PSTN
SIP System
No Remote Users!
Operator: Security Warning!
Managed
SIP Trunk
Firewall
Enterprise: Security Warning!
IP-PBX
Data LAN
VoIP LAN ??
No Soft or Multimedia Clients!

6. SIP Trunking Provider Network
Managed SIP Trunking with SBC Adapting SIP to NAT:ed Space of the Enterprise LAN
SIP Trunking Provider Network
Public Internet GW
PSTN
SIP System
No Remote Users!
Enterprise: Can we trust having our LAN pulled to the operator?
Other customers
Managed
SIP Trunk
Firewall
IP-PBX
VoIP& Data LAN

7. SIP Trunking Provider Network
Ingate Firewall® Creating a Common Data and VoIP LAN for Managed SIP Trunking Service
SIP Trunking Provider Network
Public Internet GW
PSTN
SIP System
Remote Users
Managed
SIP Trunk
Ingate Firewall®
IP-PBX
Demarcation point and SIP communication via both WAN pipes.
Data & VoIP LAN
Soft Clients and Multimedia Terminals

8. SIP Trunking Provider Network
Ingate SIParator® Used with Existing Firewall for Managed SIP Trunking Service
SIP Trunking Provider Network
Public Internet GW
PSTN
SIP System
Remote Users
Managed
SIP Trunk
Ingate SIParator®
IP-PBX
Firewall
Demarcation point and SIP communication via both WAN pipes.
Data & VoIP LAN
Soft Clients and Multimedia Terminals

9. Ingate Firewall® Creating a Common Data and VoIP LAN for SIP-Trunking over the Internet
SIP Trunking Provider
Public Internet
PSTN GW
SIP System
Remote Users
Data & VoIP LAN with QoS
SIP Trunk over Internet
Ingate Firewall®
Firewall
Demarcation point and bringing SIP communication to the LAN
IP PBX
Data LAN
Soft Clients and Multimedia Terminals

10. Ingate SIParator® Used with Existing Firewall for SIP Trunking Service over Internet
SIP Trunking Provider
Public Internet
PSTN GW
SIP System
Remote Users
Data & VoIP LAN
SIP Trunk over Internet
Ingate SIParator®
Firewall
Demarcation point and bringing SIP communication to the LAN
IP PBX
Data LAN
Soft Clients and Multimedia Terminals

11. Thank You Questions?