Why?   Because the Covergence Session Manager (CSM) bridges the “islands of real-time communications” and transforms VoIP into a managed application on their IP network. It does this by moving communication policy enforcement out of the individual applications and into a common SOA infrastructure. Giving organizations the ability to control and manage multi-vendor VoIP and Unified Communication environments from a single point in the network.

The Voice-enabled Intranet

Today enterprises are forced to interconnect PBXs via carrier voice services rather than their own wide-area networks. Routing intra-company calls over the PSTN costs millions of dollars annually and also diminishes the ROI from Unified Communications and communication-enabled applications.

A Voice-enabled Intranet delivers intra-company calls over the existing WAN. The Covergence Session Manager (CSM) is communications infrastructure that integrates and intelligently routes real-time communications over the WAN, so that organizations can realize the full ROI from IPT, UC or Communication-enabled applications.

The CSM removes the three key obstacles that prevent VoIP-enabled Intranets;

• Multi-vendor Interoperability: Because multi-vendor SIP interoperability is far from assured the CSM translates between SIP dialects. Its SIP signaling and media normalization capabilities ensures interworking for all major IP PBX vendors.
• Routing VoIP Traffic Over the WAN: Common routing policies, a fully distributed, policy-based route engine and sophisticated call routing policies based on MOS scores, least cost routes, congestion, resource availability, bandwidth, and congestion ensures voice over IP with the required quality and performance.
• Uniform Policy Enforcement: The CSM moves session policy − control, routing, security, interoperability, etc. − into a common SOA-based infrastructure to give organizations the ability to control, secure, and manage multi-vendor VoIP environments from a single point in the network.

Deployment Scenarios

Edge Deployments

Many organizations need to extend real-time systems beyond the firewall, to remote users, sites and to service providers. Our edge solutions enforce security, control, monitoring and interoperability policies at the edge of the network.

SIP Trunking: CSM makes it possible for organizations to securely extend their Avaya, Cisco, Nortel, Siemens or Asterisk IP Telephony systems back to a service provider (carrier trunking) More .




Remote Access:

The CSM Edge Solution is designed to sit at the edge of the network to secure, manage, control and scales access to VoIP and other SIP services. With CSM, organizations can support remote/mobile employees with complete safety, reliability and control. CSM security features include:

- Strong, standards-based cryptographic authentication

- Standards-based signaling and media encryption

- Stateful and stateless signaling and media validation

- Multi-layer intrusion and attack prevention

- Denial-of-service (DoS) and distributed-DOS protection

- Application-specific virus scanning and content filtering

- Policy-based monitoring

Click here to get more information on CSM's security features.
Click here to see the TLS and SRTP devices and applications supported by CSM.

Core Deployments

Core deployments are generally not concerned with SIP traffic crossing the enterprise network perimeter. They are focused on providing a common intelligent infrastructure that can be used to uniformly shape SIP sessions across vendor boundaries.

Session Routing

One of the fundamental problems that face today is that dial and routing plans are contained within existing PBX’s (Avaya, Cisco, Nortel) which limits scaling and makes management very difficult. The CSM’s centralized dial plan, policy based session routing, server load balancing, call admission/emission control, SIP signaling manipulation and interoperability capabilities, greatly simplifies management, ensures uniform policy enforcement and allows applications and users to connect to any resource or person instantly with no other changes in their infrastructure.




Application Integration

Organizations are integrating voice communications, instant messaging, presence and other real-time capabilities into business applications to streamline business processes. The CSM‘s robust Web Services interface (Figure 1) enables organizations to control real-time sessions from their business applications dynamically, using standard protocols such as SOAP and WSDL. The CSM Web Services capability makes real-time sessions programmable from business applications.




CSM provides a Web Service interface for every CSM operation such as: Setting configuration parameters, getting status information, creating a call, routing a call, forking a call, encrypting a call, recording a call, terminating a call, and many others. This enables an authenticated system to dynamically and uniformly enforce policy over any or all real-time sessions.







Figure 1