ephony will be in the following areas: Conversion of signaling methods to SIP Inclusion of some real-time video capabilities Expandability via USB These future capabilities should be taken into account when considering SIP trunking solutions. Current SIP trunking solutions that are limited to narrow-band PSTN voice will not be successful when the next major upgrade of enterprise IP Phones occurs and enables for a wider range of features. Enterprise customers need to consider the require- ments imposed on a SIP Trunking solution when endpoints become more advanced. 16 SIP Trunking The summary of the requirements is as follows: More complex endpoints with greater capability result in more complex use cases for SIP trunking, outside of basic voice. Increase in use of wideband codec and video calls require the solution to support higher bandwidth sessions. Complex features, such as location-aware calling, advanced caller-id, and presence are demanded by end users, and the SIP trunking solution needs to adapt to these new features. Enterprise Softphone IP Phone Trends Softphones are clients installed on laptops, desktops, netbooks, or any other devices that weren't originally designed as phones. They are an IP communications endpoint. Softphone deployments have exploded in enterprise telephony as secondary communica- tions options for most and as a primary communications option for a few. Softphones benefit workers who are remote or teleworkers who can work from any where as if they were in the office provided they have secure IP connectivity to the central call- control entity. With the increase in speed and fidelity of the integrated microphones and speakers included in most PCs, it is a safe bet for most companies to assume the PC devices their employees have include the basic capabilities to enable them to run as softphones. Because the cost model shifts dramatically with the use of softphones from the tradition- al cost of a $300 to $500 handset per person in an enterprise to a software cost model of generally le