BANGLADESH TELECOMMUNICATIONS COMPANY LIMITED - BTCl

3.1 Brief Description of the NetworkBook 2Chapter ThreeProposed Network ArchitectureUnder this Procurement, NGN Platform shall have two Softswitches to be installed atSher-E-Bangla Nagar and Ramna Telecom Buildings. To interconnect existing PSTNexchanges 7 Trunk Gateways (TGW Node) will be installed at Sher-E-Bangla Nagar,Gulshan, Uttara, Mirpur, Moghbazar, Ramna and Nilkhet. Each of the TGW nodes shallhave necessary equipment to complete the network. BTCL owns an IP core networkconsisting of Huawei L3 Switches (Model S8512, S8508 and S6506R). There are enoughGE (optical) ports available in the switches. The proposed network shall use this IP corenetwork. A centralized Network Management Systems (NMS) shall be installed at Sher-E-Bangla Nagar Telecom Building but there shall have required number of terminals inseven TGW nodes to run operation & maintenance activities locally. An overall networkarchitecture is given in Diagrams at the end of this chapter.3.2 Traffic MatrixSTM-1 and E1 traffic matrix for the TGWs are as follows:A. Connectivity Matrix of SB NAGAR Trunk GatewayName of exchangeNo. of No. of E1 No. of CCS7STM-1Sig. terminalsNo. of GE oAlcatel Tandem 3 8 12 -E-10 Local - 36 2 -DMS Local - 16 2 -ZTE Local - 16 2 -Huawei Local - 10 2 -Huawei Savar - 10 2 -N Ganj ZTE - 10 2 -PMO ZTE - 10 2 -Alcatel TAX 1 8 4 -NEC Tandem - 50 4 -ANS Gateway - - - 2IP Backbone - - - 2Grand Total 4 174 34 4Name of exchangeB. Connectivity Matrix of GULSHAN Trunk GatewayNo. ofSTM-1No. of E1No. of CCS7Sig. terminalsNo. of GE oE-10 Local - 28 4 -DMS Local - 14 2 -ZTE Local - 10 2 -ZTE Cant - 12 2 -DMS Cant - 12 2 -S-12 Gazipur - 8 2 -C&C Gazipur - 12 2 -Book 2 :: Tender on Replacement of Old Telephones in Dhaka City Page: 23 of 153