NIB2 Expansion and Year 2 Order Overview 29 locations added which makes the total to 100 Core backbone is getting aligned to BSNL Transmission (DWDM) network
24 City core network increased to 29 All 29 city core network links are STM-16 (ie STM1 connectivity of A cities will be upgraded to STM16) New 5
Cities are Belgaum, Dehradun, Rajkot, Jodhpur, Jabalpur
Components of Broad Band Access Network Broadband Remote Access Server (BBRAS). Gigabit and Fast Ethernet Aggregation Switches (LAN Switches. Digital Subscriber Line Access Multiplexers (DSLAMs).
SSSS/SSSC (Subscriber Service Selection System Centre. Servers for AAA,
LDAP at NOC NIB connectivity diagram Provisioning and configuration management at NOC.
DSL CPEs (MODEM. The DSLAMs will in general be collocated
with existing PSTN exchanges, which provide last mile access to customers over copper wire up to average span lengths of 3 kms. All DSLAM‟s will be aggregated through a FE interface except 480 port DSLAM, which will be aggregated through Gigabit Ethernet Interface. The 240 ports DSLAM will have two number of FE interface. The FX or GBIC module in DSLAM and LAN switch capable of driving upto 10 km on a single mode fiber. The SX or GBIC module in LAN Switch used for connecting Tier to Tier. In
bigger cities like AAA and A, one BBRAS per city will be deployed initially. There will be no BBRAS at Band B cities. The DSLAMs in BB and other lower hierarchical cities will be aggregated through Layer 2 switches, and will be connected to the nearest BBRAS of A cities on Ethernet over SDH. The BRAS shall terminate the PPP sessions initiated by the customer and extend the connection further to MPLS VPN/ Internet as desired by the customer.
Network Layout A City 
