is a physical device to obtain signalling and/or bearer information from a telecommunications network
, such as a corporate telephone system. The probe passively monitors the E1
bearers, and extracts the signalling information for onward presentation to a network application
. A passive probe does not affect the network under observation, and this is achieved through use of protected monitor points on the network distribution frames.
The network application may be Lawful Interception or a revenue-generating application such as Missed Call. Probes are also extensively used in Operational support systems
Passive monitoring probes provide a network and switch vendor-independent solution for network applications.
concerns the delivery of calls and data to government approved reception centers. Interception is authorized through a legal framework, such as UK RIPA
or US CALEA
or Russia SORM
SS7 probe technology provides the correct physical interface to the telecommunications network. Opportunities for probing occur in both traditional TDM infrastructure as well as in 3G
networks. The different characteristics and infrastructure used for these interfaces is reflected in the types of interfaces to be monitored. These range from E1 or T1 2mb/sor 1.5Mbs to SDH
STM-x OC-x multiplexes.
Probe Vendors such as Telesoft Technologies
, BTT Ltd
and Septier Communication
's and options for software vendors to implement applications.