w a config- urable threshold during call? 178 SIP Trunking Does the product support Packet Capture capability via the management GUI/CLI for such items as signaling and messaging? System Specification When you are deciding on the right SBC, you need to check the system specifications of that device, too. Vendors build products differently. The physical characteristics of the SBC can vary based on the size and capacity of the box. Moreover, the connectivity, hardware, processing power, energy savings, and other things should be considered. Ask the following questions: Does the product support 100/1000-Mb Ethernet Ports-Copper? Does the product support 1000-Mb Ethernet Ports-Fiber? Does the product support Internal AC Power Supply (110/240 v) auto sensing for voltage range? What is the local routing table entry size? Does the product have a dedicated Encryption Acceleration Hardware? Does the product support having a private IP address on its public-facing port? Does the product have a security-hardened operating system suitable for deploy- ment in the Demilitarized Zone (DMZ)? Does the product support IPv6? Does the product support SIP routing for trunks? Performance/Sizing You might find a feature-rich SBC, but it might not perform the way you want. For exam- ple, you might look for an SBC that can support 500 simultaneous calls, but the vendor does not support 500 calls in a single box. You also need to be careful about the word "session" and "call." Some vendors specify their capacity as total sessions. But, a complete call needs two sessions. So, you need to half their numbers to find the right capacity of that SBC. You can judge the performance of the SBC by the following three criteria: Availability Load balancing Performance We use different parameters to find the right size of your SBC. You might need to adjust the following questions based on your own needs. Chapter 9: Questions to Ask of a Service Provider Offering and an SBC Vendor 179 Availability First, you need to decide whether you need a high-avail