A Softswitch has replaced the traditional switch based on hardware and
takes up all the functionalities of a calling agent in the form of a
software which is loaded into a personal computer system. Thereby,
functions such as billing, call routing, signaling, call services and
so on are all handled by the softswitch. It also manages and controls
several different Media Gateways over a TCP/IP link. Media Gateway
enables connectivity of different media streams to create an end to end
data or voice call. It may have interfaces to connect with different
networks including PSTN, E1, STM etc.
A distinguishing
characteristic in a switching platform is its ability to handle retail
versus carrier services. Thereby, a Class 4 switch is mostly used
between two operators, such as in the case of making long distance
calls, where calls are routed from a particular operator to another
using a softswitch / switch. Whereas, a Class 5 switch is used in
scenarios where the switch is directly connected with the end user;
examples include switches used at telephone exchanges.
A next
generation softswitch is able to manage multiple communication streams
that includes voice, fax, data and video traffic. With the help of
sophisticated routines or programs it is able to break up information
into packets containing payload and header which contains routing
instructions needed by the switch.
A softswitch can support
signaling protocols for connectivity over TDM or VoIP. In the early
years, VoIP technology had issues with regards to meeting the strict
QoS requirements needed in real-time communication, therefore it wasn't
able to find widespread adoption. However, over recent years VoIP has
turned into a robust and cost effective way of communication, meeting
QoS standards essential for carrier-grade communication.
An
alternative option to having a telecom switching infrastructure and
keeping a softswitch at the premises of the carrier is to acquire a
hosted softswitch service. In a hosted softswitch service, logical
divisions / partitions are created on the softswitch where each
partition owner can have exclusive access to the data, switching
functionality, signaling IP, CDRs, and details of interconnecting
endpoints. The switch partition owner has full access to the entire
functionalities of the switch. Such a system is quite easy to setup and
manage, and can get up and running in a matter of minutes. Furthermore,
the carrier can decide to boost up its capacity on the system as its
business grows. This results savings in cost overheads and efficiency
in resource utilization.
vSwitch: Hosted softswitches
provides advanced Switching platform as a service (Saas) and solution
for billing management. The switching platform is placed in a
state-of-the-art collocation facility in the Boston, USA with full
redundancy at every network element and a robust firewall to allow
secure access to the platform. The service encompasses Nextone /
Genband switch access which is the market standard in wholesale voice
switching, premium IP bandwidth through multiple Tier-1 carriers,
comprehensive billing management system, 24 x 7 support, and flexible
pricing plan.
An expert working for Vswitch
Hosted softswitches has written this article.