Thicker lines represent multiple groups of that cable (i.e. a thick blue
line represents some multiple of 4)
The darker section of the building represents the main admin section
Data terminations within these rooms were not shown - instead, cables
will be run directly via decorative raceways to individual computers &
printers (10 in total)
optical cables will be run in a similar fashion to the servers (in room
AD6)
Room prefixes have meaning:
prefix A, B & C represent different sections/faculties
prefix D represents demountable rooms, for general purpose studies
prefix AD represents admin rooms
3 IDF's were chosen & placed - one for each of the three main (imaginary)
faculties
each faculties is responsible for it's own IDF
This scheme increases overall simplicity & management
MDF connects to admin, servers & (obviously) IDFs
IDFs connect with all curriculum (& teacher) computers
Any expansions (eg: extra demountables) can be easily incorporated,
with minimal cable length
General Wiring Instructions:
Groups of cables within dropped ceiling space (i.e. all wires in above diagram)
will be mounted using ladder racks, rather than tie-wraps.
The exception to this is all single runs of CAT5 (in the admin section)
where tie-wraps will suffice.
NOTE: We have not included this in the costing yet
Cable within each room (including admin rooms) will be mounted to walls
using decorative raceway
All cables must match TIA/EIA-606 labelling specifications (UL969)
all cables will be clearly and appropriately labelled with classroom/room
identifier at each termination
All cables will meet TIA/EIA-568-A cabelling standards
length requirements will be easily satisfied (see diagram)
wire will not be: stretched, untwisted, kinked, affiexed with staple
guns, bent in too small a radii. etc.
Purpose of Including Rooms in Scheme:
The origional floor plan we recieved showed a total of 34 termination
points in 33 different classrooms (see diagram)
As you can see, we have provided wiring to ALL of these data termination
points
we did so because our Lecturer told us this was a requirements
The classroom A3 represent the special case where 2 termination
points are shown in a single classroom
A3 is a particularly large classroom (twice as big as the others), so
we reasoned that it may be designed to accomodate twice the number of
computers - perhaps it is a research area room.
therefore this classroom is supplied with 8 runs of CAT5 cable
Each room:
can contains up to 25 computers - 24 curriculum computers & a single
teacher computer
has it's own POP with a lockable cabinet for: electrical components
& cable terminations
the 4 incoming CAT5 runs run into this lockable cabinet.
3 of these connect to hubs which, in
turn, connect to curriculum computers.
1 connect directly to the teacher computer.
These cables (from the cabinet to computers) will be neatly hidden
in raceways.
34 terminations points * up to 24 computers
per termination point = up to 850 curriculum in the school
However, the user requirements say we can assume a maximum of
250 curriculum computers
max. of 250 curric computers / 34 termination
points = a max. average of 7.35 computers per termination
point
Obviously, although we have provided connections to all 34 termination
points, not all classrooms will be initially set up with computers
and/or certain classroom will have fewer than 24 curriculum computers.
Some classrooms many only need 1 computer
However, since all termination points are wired, as the school grows,
it will easy to encorporate up to 850 computers
In the distant future, other blocks may be built around the school and
this could become the computer block.
Example of Simple Installation (Admin Section):
The easiest installation will be the admin computers & printers.
These are all close to the MDF
Single runs of CAT5 cable will be run via tie-wraps (using a
ladder rack for a single wire seems wasteful) through ceiling space, the
short distance from the MDF wiring cabinet to each individual device in
the admin building.
The two servers in this school are located in AD6 - right next to
the MDF - so (instead of using ceiling space) we can drill a hole straight
though the wall, then via raceway to the servers.
Examples of Difficult Installation (Demountables):
Between the main building and the demountables there is already an exiting
underground conduit (the underground part seems
like a logical assumption) for datamedia cable runs.
Without digging up the coduit to lay any extra cable (we need a total of
24 CAT5 cable runs here - 8 for each demountables) there is a strategy we
can use.
This strategy is similar to "fishing the line" - any existing
wires/string/etc will be used to attach the new wires (using adhedsive
tape), and carefully pulled through to the opposite end.
By using bigger and bigger quantities of cables, this technique should
work, but if the wire gets stuck/blocked then the messy approach (involving
shovels) will be necessessary.
Also note that making the ladder racks & cable installation for the
IDF's to classrooms will be a fairly monumental job (see diagram) - involving
a lot of people and good management if it is to be completed over a single
summer holidays.
The ceiling space is only 60 centermeters in height (3.3m - 2.7m) -
which will make installation of ladder racks (by removing ceiling panels
a few at a time), a slow and tricky process.
The fluresent lights in the ceilings of the classrooms will need to
be avoided (as much as possible) for fear of electrical interference.
The cost of paying contractors for wire installation does not enter into
TCS, but we would expect it to cost 10's of thousands.