Delhi University Campus Networking
The project consisted of setting up of a campus network to connect
all the colleges, departments and hostels of Delhi University, one
of the premier educational establishments in the country. It encompasses
3200 nodes connected on eCat 5 UTP cable and 43 Km of fiber optic cabling.
Delhi University has two campuses – the North and South Campus.
There are a few colleges located outside the campuses as well. The
North Campus has a wide area compassing of an approximate land of
2 sq km.
To leverage the benefits of IT, the University decided to implement
a campus wide network at both the campuses.
The network implemented for Delhi University was based on state-of-the-art
gigabit technology using E-CAT5 UTP and Fiber Cabling. The aim
was to deploy infrastructure that would be able to support the
latest technologies in the future. Following guidelines were followed
in executing the plan:
a) The infrastructure was to be future proof in terms of supporting
new technologies and bandwidth capabilities.
b) The entire cabling was to be done based on EIA/TIA standards.
c) The number of nodes within the building to be planned for maximum.
d) Use of E-CAT5 cabling product (UTP) for cabling within the building.
The cable and other related components should be able to support
e) Use of 6 Core Outdoor Fibre cable for a connectivity between the
f) The UTP nodes were to connect using 10/100 Mbps connectivity and
the backbone connectivity between switches would be based on Gigabit
There are 67 buildings in North Campus and 19 in South Campus to
be networked together. It included various departments, colleges
and university hostels.
The physical topology of the network at North Campus in relation
to connectivity of buildings is three tier while the topology of
the South Campus is two tier. The network has a core connection,
5 zonal locations and then end points named as Department locations.
The departmental locations connect to the nearest location in case
of three tier or they connect to the core location in case of two
tier topology. This grouping was done based on geographical spread
of the locations. Further locations connect back to the core location.
- North Campus:
The University Computer Center was chosen as the core location. It
would connect to other zonal locations and would act as the
Zonal location for buildings near it.
- South Campus:
The University library was chosen as the Core Location. This would
connect to the other buildings in the campus.
Five Zonal locations were selected
- Computer Center (co-located with the core location)
- Physics Old
- Agri Economics
- Tutorial Building
- CSEC (Science Center)
Outdoor Cabling- Armored Fibre Optic Cable
The connectivity between locations i.e. the backbone is over 6 Core
Outdoor Armored Fibre Optic Cable (make Krome Communications) running
Gigabit Ethernet on it. Both multimode and single mode cables have
been used at the North Campus depending on the distances between
the two locations to be connected. Only single mode cable has been
used in the entire campus for connectivity between the two locations.
The zonal locations are connected to the Computer Center completing
the connectivity across the campus.
The outdoor fibre has been laid underground. The fibre has been
laid through the HDPE ducts for the same. The HDPE ducts have been
laid in trenches dug up to 3 feet throughout the campus.
Two type of HDPE ducts have been used
- 50 mm outer dia
- 32 mm outer dia
Criteria for Laying Fiber Through HDPE Ducts
The following criteria was followed for laying of fiber through the
- 50 mm duct has been used to carry 2 fibre cables only.
This provides a scalability of pulling 1 extra fibre at a later
stage through the
- 32 mm duct has been used to carry 1 fibre cable
- The backbone connectivity i.e Fibre cable between respective
Zonal location and the computer center has been laid through
the 50 mm
duct. This has been done to ensure future scalability.
ducts used are prelubricated allowing the use of techniques such
as Fibre blowing etc and making the laying process
These ducts have been laid through not only the open trenching or
manual trenching but trenchless digging has also been deployed to
cross the MCD roads. The complete digging layout and the HDPE duct
layout, depicting the trenchless digging, has been enclosed herewith.
Cable pulling pits have been provided for maintenance and trouble
shooting purpose at desired locations. The HDPE ducts at these pits
have been joined together using the HDPE coupler of respective sizes.
Indoor Cabling – UTP E-CAT5 Cabling
The user density within the building is varying. A total of 3198
UTP nodes have been implemented in these buildings.
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