The Media Card Gateway controls the interface cards and application cards in the MG1000E Chassis. On a hardware level the MGC provides conference channels and tone generation for the phones. DSP Daughterboards are connected to the MGC to provide tone and conference functions between TDM and IP phones. The MGC is a replacement for the legacy Small Systems Controller (SSC). It has about 10 x the processing power of the SSC and four times the memory. It uses a standard Compact Flash for internal storage and has two internal ports for the installation of DSP Daughterboards. There are a total of six Ethernet ports on the MGC, four on the front (two ELAN, two TLAN), and two that are available through the backplane via a 50-pin to Serial/ELAN/TLAN Adapter.
There are two types of DSP Daughterboards that can be placed into the MGC. The 96-port DSP Daughterboard can be placed in Slot 2 only, and provides 96 channels of voice. The 32-port DSP Daughterboard can be placed in either Slot 1 or Slot 2. Using one or two DSP32 DBs you can achieve 32 or 64 channels of voice, and using a standalone DSP96 DB or a DSP32 and a DSP96 you can achieve 96 or 128 channels of voice. If the system requires more than 128 channels of voice to be converted from IP to TDM a separate Voice Gateway Media Controller card will be required. The DSP resources provide VoIP CODECs, compression, and echo cancellation.
The MGC provides 60 channels of Tone and Digit Switching (TDS), sixteen Digitone Receivers (DTR) or Extended Tone Detector (XTD) units, and additional tone service ports. It also provides two loops of 30 conference units each, for a total of 60 conference channels.
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