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I'll reply to the list since it seems of general
interest. My company makes C4 Softswitches but I'll stick with
general recommendations. Common commercial manufacturers include ourselves, GenBand, Sonus, Oracle, Switchray (aka Mera), Kamalio, Cataleya and others. Most of these will cover your short list of requirement. However you may also look for other relatively important features since your Softswitch investment will last a long time and your network requirements can change. Common other features to look at or plan for include: 1. Access/Subscriber side SBC functions for hosted C4/PBXs like Broadsoft. 2. DOS/DDOS detection and mitigation. 3. Fault tolerance or HA operation (ie, stateful switchovers). 4. LCR and/or billing applications to control off net routing. (another whole world of features exist on this subject) 5. TLS/SRTP support. 6. Good monitoring applications for performance alerts and troubleshooting. 7. Transcoding support. 8. VM deployment options. The debate about the value of open source is ongoing and subject to change. Alex addressed this subject well but it is worth noting that some large carriers are embracing open source solutions so that they can modify the functionality themselves. Alternatively many small carrier select open source so they can save money on capex costs although this will normally lead to higher opex costs for management. On the subject of OS I would recommend staying with Linux and avoid a Microsoft solution. The real time nature of media handling seems to be problematic for Windows although potentially the Intel DPDK technology may mitigate some of these problems. Best regards, ~Glen On 6/20/2015 11:21 AM, Ryan Finnesey
wrote:
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