One governed pipeline, five service lines.
Every engagement runs the same governed lifecycle, whatever the service line. Five service lines across the optical, transmission and IP estate, held to one assurance standard.
Survey
Ground-truth route, ducts, chambers, reach.
IHLD / HLD
Topology, backbone routes, service sectors.
LLD
Splice packs, channel plans, chamber layouts, BoM, civils SLDs.
Sign-off gateAssurance
Link-loss, OSNR and GSNR proven to end-of-life margin under TfL and LU assurance.
Sign-off gateAs-built
Red-line capture, handover, O&M, close-out.
Optical Fibre & Transmission Design
End-to-end fibre and transmission design across the full lifecycle, producing LLD packs that are buildable as drawn for rail, metro and urban networks.
- Fibre lifecycle from survey through IHLD and HLD to LLD and as-built, with sign-off gates.
- Optical link-loss and power budgets, OSNR and GSNR analysis, reach budgets to worst-case, end-of-life margins.
- Fibre topology and allocation, splice and closure planning, splice packs, chamber and gel-wrap layouts.
- DWDM and CWDM channel plans on fixed and flexible grid, C-band with C+L expansion, and OTN transport with staged migration off legacy SDH and PDH.
- Coherent design from 100G to 800G: IP over DWDM with 400ZR, OpenZR+ and 800ZR pluggables on open and disaggregated line systems.
- Duct and chamber design, civils, duct and box-to-box single-line diagrams, BoM and BoQ, laterals to street furniture.
- Base Station Hotel fed cluster architecture over re-used ducts and fibre.
TfL Connected London: full-lifecycle DWDM bearer design for 5G small cells over re-used TfL ducts, engineered to a 12 km reach budget. LLD packs approved first time.
Network Design Authority & Assurance
Independent, vendor-neutral design ownership across multi-vendor estates, so designs stand up to authority and third-party review and hand over cleanly.
- Transmission and migration design leadership: Scope of Works, LLD and method statements.
- Capacity planning with engineered headroom for future services such as CBTC and ESN.
- TfL, LU and third-party design assurance, carried through to sign-off.
- O&M, handover and close-out, with test and commissioning strategy.
- Third-party interface and integration management across vendors such as Nokia.
- NMC and NOC integration, network-management and HMI design.
LU Connect: lead transmission and migration design under TfL and LU assurance, with capacity headroom engineered for CBTC and the Emergency Services Network.
Rail & Mission-Critical Transmission
Transmission design for operational and life-safety systems on rail and metro, carrying CCTV, radio, SCADA and comms on resilient bearers, and migrating the SDH and MPLS-TP estates that still run them to modern packet transport.
- IP-CCTV and video transmission design and migration, from legacy decoder trays and matrix switching to ONVIF-conformant IP video.
- Operational bearers for SCADA, RTU, PLC, PA/VA, VIDS, help points and station comms.
- TETRA, ESN and FRMCS coexistence and transmission planning, including bearer readiness for the GSM-R to FRMCS transition.
- Bearer design across fibre, MPLS-TP and legacy SDH, with engineered migration paths to Segment Routing and Carrier Ethernet.
- Renewal of converged GbE, MPLS, SDH and ATM estates onto packet transport, keeping the video WAN backbone live throughout.
- Clear separation of operational networks from passenger connectivity, aligned to IEC 62443 zones and conduits and CLC/TS 50701.
LU Connect video WAN under Thales, then the LU Connect renewal under Hitachi Rail: sustained design ownership of a live operational video and transmission estate.
IP / Data Network Design, Test & Commissioning
Converged IP and data-network design and assurance with structured test, commissioning and handover across multi-vendor estates.
- Converged IP backbone design across MPLS, MPLS-TP, SR-MPLS and SRv6, with EVPN and L3VPN service layers.
- Multi-vendor routing and switching across Cisco, Juniper, Nokia and Arista, with migration experience off legacy Brocade, Alcatel-Lucent and Ericsson estates.
- Network security design with current-generation firewalls: Cisco Secure Firewall, Palo Alto Networks, Fortinet and Check Point, with IDS and IPS placement and zero-trust segmentation.
- Test and assurance with EXFO and Anritsu field instruments and Keysight and Xena traffic generation, against written test plans covering RFC 2544, Y.1564 and TWAMP.
- Data validation, QA, close-out and third-party interface testing.
- Timing and synchronisation: PTP (IEEE 1588) with the G.8275 telecom profiles, SyncE and GNSS-resilient time distribution.
Elizabeth line, contract C660: test, assurance and close-out of the converged IP and MPLS data communications backbone for Siemens.
Software & Design Automation
We design fibre networks the way our clients do, then build the software that automates the work: rules engines, data QA and bespoke tooling.
- IQGeo configuration, customisation and integration, with platform debug and test against client design rules.
- QGIS, PyQGIS and open-source tooling (PostGIS, GeoPackage) for lighter-licence workflows.
- Design-rule automation that catches design errors before they become construction errors.
- Data validation, QA and topology checks embedded in LLD production.
- Data migration, ETL and cleansing, with digital-twin enablement for a single source of truth.
- API integration across GIS, CAD, ERP and field systems.
Connected London, Streetscape workstream: streamlined the QGIS and IQGeo workflow and developed the IQGeo platform against the Streetscape design rules, with automation and data QA in the production path.
Named deliverables, not vague promises.
Each gate closes on documents a client, an assurance body and a contractor can act on.
LLD pack
Link-loss and power budgets, fibre allocation sheets, splice packs, schematics.
BoM / BoQ
Bills of materials and quantities a contractor can order against.
SLDs
Civils, duct and box-to-box single-line diagrams.
Method statements
Migration and cutover method statements for live estates.
MoP / RFS
Method of procedure and ready-for-service documentation.
As-builts
Red-line capture and as-built records at handover.
Bring us in at survey, not at rework.
A 30-minute technical call to pressure-test route, reach and margins before anything is committed to civils.