The Media Gateway 1000 Chassis

The Media Gateway 1000 Chassis houses the circuit cards and connectors that support both IP and TTDM functionality. Slot 0 must always contain the MGC, which acts as a gateway controller for IP Media Gateways (IPMG). The MG1000 Chassis has four additional universal slots that can house various other cards, including the CP PM Call Server and CP PM Signaling Server, as well as line and trunk cards. The MG1000E Chassis also supports the addition of a Media Gateway Expander, which provides an additional four slots (7-10). Slots 5 and 6 are not used. The MG1000E Chassis connects to the MGE via two copper cables, labeled CE-MUS and DS-30X. The MGE does not support digital trunks or analog clock controllers.

The CS1000E system supports up to a maximum of 50 MG1000 and MGE pairs. The MG1000E can support the following cards:
Voice Gateway Media Cards – these transcode between the IP network and digital circuit cards
Service Cards – These provide services such as music on hold and recorded announcements
Analog Line Cards – support analog stations, fax machines, and modems
Digital Line Cards – support digital phones
Analog Trunk Cards – used to connect the system to an analog network, such as the PSTN
Digital PSTN Interface Cards – this can include E1, T1, and ISDN BRI cards to provide access to the PSTN
Class Modem Cards – such as the XCMC
DECT Mobility Cards – these provide wireless functionality

It is important to remember that digital trunks, PRI and BRI ISDN cards, and DECT mobility cards are only supported in the MG1000E that contains the MGC. They can not be placed in the MGE.

Media Gateway Controller

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.