Cisco uses OpenSER, an Open Source SIP router and more in Linksys One.
VoIP IP Telephony @ http://snapvoip.blogspot.com
It is coming in to light that big name companies are using more and more Open Source products. It is no difference when it comes to VoIP. I remember a bunch of companies that used OpenH323 before SIP came to be the leading protocol.
It is revealed that Cisco is using OpenSER as SIP proxy for Service node in Linksys one communication platform.
OpenSER is not the only Open Source Package in the Service Node;
The Cisco Service Node servers run a collection of open-source and Linksys One software:
• FreeBSD-This is the open-source operating system that runs on all Cisco Service Node servers. FreeBSD provides a mechanism that allows multiple virtual instances of the OS to be spawned and run on the same server, with each virtual OS completely isolated from all other instances. This is the partitioning mechanism used to implement the brand-level services.
• PostgreSQL-This open-source package is used to provide database services on the Cisco Service Node.
• OpenSER-This open-source package is used as the Cisco Service Node SIP proxy.
• BIND-This open-source package is used for Domain Name System {DNS) services. The Cisco Service Node runs its own DNS servers. DNS is used for several functions on the Cisco Service Node, including ENUM-based call routing of SIP calls and branding (each brand is known to the outside world as a separate DNS domain name).
• BIND DLZ-This open-source package allows BIND to use the PostgreSQL database to store its zone information. Dynamically loadable zones (DLZ) allows DNS updates to be reflected immediately when a change is made to zone data in the database. This feature is important because CPE that uses Dynamic Host Configuration Protocol (DHCP) can change its IP address at any time. When this happens, DNS must be updated immediately for the ENUM-based call routing to be able to successfully route calls to the CPE.
• NET-SNMP-This open-source SNMP package runs as an agent on the servers and implements several MIBs.
Thank you Cisco for letting us know so openly ;) and congrats to OpenSER people for providing such quality product.
Links;
The OpenSER mail archive entry and discussion
OpenSER gets CISCOs vote of confidence
Cisco Service Node for Linksys One SN-10 and SN-100 Data Sheet
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