But most enterprises and SMBs are now looking to cut costs, and one way they hope to do that is by incorporating mobile devices into their IP-based communications ... round-up features a selection of ...

which is a virtual connection between a SIP-enabled phone system and a SIP service provider. A SIP trunk can carry multiple concurrent voice and multimedia sessions, or calls, using the same ...

through an industry-standard or open protocol like Session Initiated Protocol (SIP), companies can choose their own SIP-enabled devices that best suit their applications and budgets to literally open ...

Any Cisco phone with lack of SIP firmware like 7925 This list will probably grow as I find more cisco phones that are SIP compatible but too much work to implement.