Abstract versions of the designs I produced for a city-wide surveillance project. Equipment models, quantities, locations and node names are replaced with generic labels. Values marked as illustrative are examples of the method.
Technical design
Network topology
How the site nodes and their edge devices (CCTV, ground surveillance radar, ANPR, barriers) connect to the core network, data center and control room.
DecisionsRedundant core and firewalls, one edge switch per site node, separate recording paths by device type
Used forEquipment BOQ, rack layouts, vendor configuration scope
Technical design
Rack layouts
Four 42U racks: field fiber termination and aggregation, two mirrored core racks, and recording servers. Each rack carries its own power and heat table.
Patch panelsSwitchingServers and storageManagementCore and security
InputTopology, port counts, device dimensions
ChecksRack units, fiber and copper terminations, power and heat per rack
Used forInstallation, cabling plan, HVAC and UPS sizing
Technical design
Fiber schedule
Each node gets a dedicated core pair from the control room, with distances, a 20% safety margin and the optic type chosen by link length.
#
Route
From
Node
Core pair
Distance (m)
Segment (m)
+20% margin (m)
Optic
1
Route A
CR
N-01
1–2
1,150
1,150
1,380
BiDi 10 km
2
Route A
CR
N-02
3–4
1,195
45
1,434
BiDi 10 km
3
Route A
CR
N-03
5–6
1,270
75
1,524
BiDi 10 km
4
Route A
CR
N-04
7–8
1,325
55
1,590
BiDi 10 km
…
…
…
…
…
…
…
…
…
31
Route B
CR
N-31
61–62
11,940
210
14,328
BiDi 40 km
Route length, all nodesL
With 20% safety margin1.2 × L
Cable available on drumsS
Balance to order or surplusS − 1.2 × L
InputRoute survey, node positions, cable type
ChecksCumulative and segment distances, optic reach, cable on hand vs required
Used forCable ordering, splicing plan, SFP selection
Technical design
Node allocation, throughput and power
Every device is allocated to a node with its bitrate and power draw. Per-node totals size the uplinks and the node UPS; the full list rolls up into storage and recording.
Node
Device
ID
Bitrate (Mbps)
Power (W)
Source
N-01
6MP bullet
B6-01
10
13
PoE
N-01
6MP bullet
B6-02
10
13
PoE
N-01
2MP PTZ
PTZ-01
8
25
PoE
N-01
Edge switch
SW-01
–
170
UPS
N-01 total
28
221
Device type
Bitrate (Mbps)
Power (W)
Supply
6MP bullet
10
13
PoE
5MP bullet
8
8
PoE
2MP bullet
8
8
PoE
2MP PTZ
8
25
PoE+
Edge switch
–
170
UPS
InputDevice schedule and datasheets
ChecksBitrate per node and per route, PoE budget per switch, UPS load per node
Used forSwitch selection, uplink sizing, UPS and power cable sizing, storage sizing
Technical design
Coverage design
Camera placement along a road segment: each node covers the road ahead, selected nodes also cover behind, and narrower cameras close the route ends.
InputRoad alignment, pole positions, camera fields of view
ChecksOverlap between nodes, range at the target pixel density, blind spots
Used forPole placement, camera selection and aiming
Technical design
Control room and data center draft
Draft layout for the temporary control room and rack room, with operator sightlines to both video walls, plus the power and heat basis handed to the mechanical engineer.
Used forFit-out, HVAC sizing, electrical supply sizing
All diagrams are redrawn abstractions. No client, site, model or quantity data from the original documents is shown, except where marked as illustrative.