News

19. January 2017: New firmware, 37b, for E1/T1 Monitor 2.1 and E1/T1 Messenger 2.1

Release 37b is now available for download from the customer-only area.

9. December 2016: LAPD decoding capacity increase

E1/T1 Monitor 3.0 and SDH Monitor 3.0 are now capable of monitoring 400 concurrent LAPD channels (previously 320). This increased capacity is available on systems shipped from February 2016 onwards, using firmware 41c or later.

6. April 2016: New firmware, 37a, for E1/T1 Monitor 2.1 and E1/T1 Messenger 2.1

Release 37a is now available for download from the customer-only area. 37a adds a number of features previously only available on GTH 3.0 hardware.

29. January 2016: Support for 150 Mbit/s ATM in VC-4 and 48 Mbit/s ATM in VC-3 implemented on SDH Monitor 3.0

Firmware is available on request for field testing.

6. November 2014: New firmware, 41b, for SDH Monitor 3.0 and E1/T1 Monitor 3.0

Release 41b is now available for download from the customer-only area. 41b features support for ATM-on-E1 and increased MTP-2 capacity.

24. October 2014: E1/T1 Monitor 2.1 replaced by E1/T1 Monitor 3.0

E1/T1 Monitor 3.0 is now capable of monitoring all protocols supported by 2.1, in many cases with significantly improved price/performance.

The most important new feature in E1/T1 Monitor 3.0 is that 96 channels of MTP-2 can be monitored. SDH Monitor 3.0 MTP-2 capacity has also been increased to 96 channels.

E1/T1 Monitor 2.1 can be still be ordered while supplies last, e.g. for expanding existing sites.

30. January 2014: New firmware, 40a, for SDH Monitor 3.0

Release 40a is now available for download from the customer-only area. 40a includes several new features including optical daisy chaining and 32 kbit/s subrate LAPD.

15. December 2013: Sample code support for Pcap-NG file format

Our sample code for converting captures into a format Wireshark can process now uses the Pcap-NG format by default. The main benefit is that each packet now contains information about which interface it was captured on.

19. December 2012: New hardware for SDH/SONET

The SDH Monitor 3.0 extracts signalling and voice from E1/T1 links carried on SDH/SONET, normally on 155Mbit/s STM-1/OC-3 fiber.

Two hardware options are available, providing either 2 or 6 SFP slots in 1U of rack space. One chassis can thus monitor both directions of 1 or 3 SDH/SONET links.

Datasheet (PDF)

26. October 2012: E1/T1 Monitor 3.0 update

The E1/T1 Monitor 3.0 functionality has been extended. It can now also perform high-capacity frame relay decoding. One probe can decode:

  • 1488 timeslots of frame relay
  • in up to 96 channels
  • up to 48 Mbit/s of packets captured in total

A typical application is monitoring the Gb interface.

Datasheet (PDF)

29. March 2012: Software release 36a now available

Release 36a is now available for download from the customer-only area.

22. November 2011: Field reliability

Thousands of Corelatus probes and switching modules are installed in dozens of countries around the world. Several large installations have been operating 24x7 for eight years.

The hardware failure rate in the entire installed base of modules is one module failure per 229 module-years.

26. August 2011: Software release 35a now available

Release 35a is now available for download from the customer-only area.

15. June 2011: Live SS7 captures in Wireshark on Windows

We've updated our example code to allow watching SS7 signalling on an E1/T1 with packets updated live in Wireshark, on Windows. Details here

29. September 2010: New hardware: E1/T1 Monitor 3.0

The E1/T1 Monitor 3.0 is designed to provide low cost monitoring of 3G Iub and GSM Abis links.

A single probe provides 64 E1/T1 receivers in 1U of a 19" rack and can decode up to 768 concurrent channels of ISDN LAPD (for GSM networks) or 32 concurrent channels of ATM (for 3G networks).

Datasheet (PDF)

24. May 2010: Software release 34a now available

Release 34a is now available for download from the customer-only area. 34a includes an improved on-board HTTP server which allows upgrading the GTH firmware images. There are also several improvements to SS5 signalling.

28. April 2010: Example code on github

The GTH API example code (in C, Perl, Python and Erlang) is now on github. (It will also continue being available as .zip files.)

1. February 2010: Expanded C example code

The blog discusses the expanded C example code which now includes a C API for accessing the GTH (and also precompiled .exe files for Win32 machines).

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