SS7 probe

SS7 Probe 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/T1 or SDH/SONET 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.

Applications

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 (OSS).

Passive monitoring probes provide a network and switch vendor-independent solution for network applications.

Lawful Interception

Lawful interception concerns the delivery of calls and data to government approved reception centers. Interception is authorized through a legal framework, such as UK RIPA [cite web
url = http://www.opsi.gov.uk/acts/acts2000/ukpga_20000023_en_1
title = RIPA
accessdate = 2008-07-28
author = UK Government
date = 2008-07-28
language = English] or US CALEA [cite web
url = http://www.askcalea.net/calea/
title = CALEA
accessdate = 2008-07-28
author = US Government
date = 2008-07-28
language = English] or Russia SORM.

Technology

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 and SONET STM-x OC-x multiplexes.

Vendors

Probe Vendors such as Telesoft Technologies, BTT Ltd and Septier Communication provide API's and options for software vendors to implement applications.

Notes