Both are similar in many ways, but SS7 is more powerful and core to the network. PRI is a subset of SS7. ISDN PRI link must directly be connected to switch. It has no capability to route the call intelligently. Using SS7 every node in the network can be accessed. Nodes need not be connected directly, SS7 has got built in intelligence to redirect packets to the correct destination. ISDN PRI is divided into Transport (B) channels...

Where ever you hear the name gateway, assume that we are talking about external connectivity. SMS gateway is used to provide SMS connectivity to third parties or solve protocol incompatibilities. The SMSC is a part of the operators SS7 network. The SMS gateway is connected to the SMSC. In most cases the SMSC has inbuilt gateways. Any external connection from a network other than the SS7 network is handled through the gateway. One...

SS7, the backbone of mobile networks. It is the protocol and makes mobile telephony work. SS7 is the protocol that makes communication between network entities possible. SS7 network structure is very much similar to the TCP/IP network structure. As you can see from the picture SS7 protocol is also derived from OSI model and has got all the 7 different layers. In TCP/IP you have Ethernet card as your hardware and in SS7 you have...

PSTN – Public Switched Telephone Network GMSC – Gateway MSC MSC – Mobile Switching Center BSC – Base Station Controller BTS – Base Transceiver Station MSCs are the telephone exchanges of GSM networks. They route the calls based on the destination numbers current location. The BSCs and BTS are responsible to taking the call from the MSC to the handset. Those two components together handle the complications...