To implement smooth network upgrade without affecting the development of existing networks, the UMG8900 networks with the media gateway controller (MGC) to provide mobile switching center (MSC) functions in a GSM network. Figure 1 shows the GSM networking application.

Figure 1 GSM networking application 

When serving as an MSC in the GSM network, the UMG8900 and the MGC act as one device. They connect to each other through the internal interface or the standard Mc interface. Neither the UMG8900 nor the MGC can provide complete GSM service interfaces.

In a GSM network, time division multiplexing (TDM) connections are used between two MSCs, between an MSC and a BSC, and between a core network element and a public switched telephone network (PSTN).

The UMG8900 accesses voice service streams from the access network through TDM. For voice service streams between devices in the core network, the existing TDM network or the voice over IP (VoIP) function of the UMG8900 can be used to implement the VoIP connection in the core network.

The Base Station Subsystem Application Part (BSSAP) call control signaling from the access network can be sent to the MGC directly through the independent signaling trunks between the MGC and the base station controller (BSC). The signaling can also be transferred to the MGC through the signaling gateway (SG) embedded in the UMG8900 or the TDM semi-permanent connections of the UMG8900.

The signaling between MSCs in the core network is exchanged based on ISDN User Part (ISUP) or Telephone User Part (TUP). The signaling can be transmitted over TDM/IP links between MGCs or be transferred through TDM/IP connections between UMG8900s by using the embedded SG and the semi-permanent connection of theUMG8900.

When the UMG8900 and the MGC work together as a GSM gateway exchange, the UMG8900 receives voice service streams from an external network such as the PSTN through the TDM interfaces. The signaling is sent to the MGC through an independent SG or through direct connections to the MGC. The signaling can also be transferred to the MGC through the SG embedded in the UMG8900.

The UMG8900 supports complete SG functions. The UMG8900 can transmit signaling from the core network, SS7 signaling, M2UA signaling, and M3UA signaling.

The UMG8900 supports complete SG functions. The UMG8900 can transmit signaling from the core network, SS7 signaling, M2UA signaling, and M3UA signaling.

could u pls explain the above writing....pls also do for me...

prone Posted on 2014-05-30 22:26

Awesome writing...thanks

To implement smooth network upgrade without affecting the development of existing networks, the?UMG8900?networks with the media gateway controller (MGC) to provide mobile switching center (MSC) functions in a GSM network.?Figure 1?shows the GSM networking application. Please explain the above....

When serving as an MSC in the GSM network, the?UMG8900?and the MGC act as one device. They connect to each other through the internal interface or the standard Mc interface. Neither the?UMG8900?nor the MGC can provide complete GSM service interfaces. I like the above writing...

Figure was nice....

I want details abt mc interface.

Please share more. Thanks..

This document is very well done

When serving as an MSC in the GSM network, the UMG8900 and the MGC act as one device.

HOW????