1. www.xorcom.com Complete Asterisk ® Redundancy Failover Solution for Asterisk-based PBX, including telephony interfaces Asterisk is a registered trademark of Digium, Inc.

2. www.xorcom.com High Availability Solution for Asterisk  Provides full redundancy for a complete PBX system, incl. telephony interfaces  Quick and automatic failover process keeps downtime to an absolute minimum  Auto detection of server failure & switch to backup server  Firmware-based switching mechanism is not network-dependent  Solution components:  two Xorcom IP PBX units with identical configurations  Xorcom Astribank channel bank(s) with dual USB ports XPP Technology

3. www.xorcom.com Initial Setup: Identical Servers  Two Xorcom servers + dual-USB Astribank PSTN USB Astribank (front panel) USB-connected channel bank providing analog/digital telephony interfaces Xorcom server (backup) Xorcom server (primary) Analog Phones IP Phones LAN/WAN

4. www.xorcom.com Standard Operation: Primary Active  Two Xorcom servers + dual-USB Astribank IP Phones PSTN USB Astribank (rear panel) USB-connected channel bank providing analog/digital telephony interfaces Xorcom server (backup) Xorcom server (primary) Analog Phones LAN/WAN

5. www.xorcom.com IP Phones Analog Phones If the Primary Server Fails… PSTN USB Astribank (rear panel) USB-connected channel bank providing analog/digital telephony interfaces Xorcom server (backup) Xorcom server (primary) LAN/WAN Server Failure

6. www.xorcom.com Analog Phones IP Phones …the Backup Server is Activated PSTN USB Astribank (rear panel) USB-connected channel bank providing analog/digital telephony interfaces Xorcom server (backup) Xorcom server (primary) LAN/WAN Switch Changes to Backup Server Backup Server assumes Primary Server IP Address

7. www.xorcom.com TwinStar Demo

8. www.xorcom.com Thank You www.xorcom.com