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Sangoma SMG Product Plan

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The Sangoma Signal Media Gateway (SMG) is a set of technologies that augment other media gateway and PABX projects so they can connect to the PSTN for SS7-controlled intermachine trunks (IMT) and SS7 services.

Sangma SMG is composed of the following components:
  • Linux 2.6 operating system
  • Sangoma WAn adapter cards and Wanpipe drivers for E1/T1 connectivity
  • xmtp2km for SS7 MTP2
  • ss7box for SS7 MTP3
  • ss7boost for SS7 ISUP and SCCP
  • sangoma_mgd? for managing IMT voice circuits with control info from ss7boost
  • chan_woomera as a point of interface to media gateways
  • media gateway/pabx (for example, Asterisk or FreeSwitch)

Rev 0.2 (Under Development)


  • Clustering? - Multiple SMG platforms operate as a single entity. One or two SS7 links are sufficient to control a growing number of E1/T1 by adding cards and platforms to the cluster. Almost perfect linear growth curve.
  • A-link support.
  • ss7box platform redundancy for increased operational safety.

Rev 0.1 (Legacy)


  • Tested with 8 E1 at full capacity on a single platform with a single high performance CPU at 80% utilization with G.711 voice streams.
  • Voice codec interworking, CPU resource, and memory resource all impact call capacity.
  • Tested in both ANSI and ITU environments.
  • SS7 F-link capability with failover/failback support. Multiple linkset and multi-link linkset support. Alternate route support.
  • See product plans for individual components listed above for more details.

Created by: mike last modification: Tuesday 10 of April, 2007 [20:26:52 UTC] by mike


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