A new SS7-SIGTRAN protocol interchanger software operated with modified USB E1 for nationwide IP backbone - Necessity for BTCL PSTN

This paper presents a new Signaling System no. 7 (SS7) and IP based Signaling Transport (SIGTRAN) protocol interchanger software and related hardware for Bangladesh Telecommunications Company Ltd. (BTCL) to expand its existing network using IP backbone. As the demand of wireline phone of BTCL is increasing day by day, it has become a necessity for BTCL to expand its network. At this point, BTCL can expand its network by establishing IP backbone and connecting it with the existing SS7 network using the new SS7-SIGTRAN interchanger software. This will be a good utilization of the newly arrived IP based transport and switching technologies which is reducing the cost of delivering different services. Again, compared to voice, packet data is becoming more significant proportion of traffic for BTCL. It has become essential to find ways of consolidating voice, data traffic, platforms and services to reduce the operational, maintenance and initial cost of BTCL. IP network is the best solution to this problem. This makes network expansion through IP backbone while keeping connection to the existing SS7 network a necessity for BTCL which is possible by using the proposed software and hardware.