Service 01 / 07
Networks & Wi-Fi
LAN and WLAN architecture, VLAN segmentation, routing and site-to-site VPN, copper and fibre cabling, patch racks and power distribution. Wi-Fi coverage measured on site, not estimated.
IT & low-voltage infrastructure integrator — Paris & Île-de-France
Network, IP telephony and security infrastructure for businesses.
Design, deployment and ongoing operation. UniFi networks and Wi-Fi, 3CX telephony, IP video surveillance, access control, intrusion alarm and websites — for a single site or a multi-site estate.
- Founded
- 2009
- Paris 16th & Franconville
- 2 offices
- On-call under contract
- 24/7
Typical layout
Live
- Carrier uplink Fibre · ONT · 4G backup
- Fibre or SDSL, ONT and a 4G/5G backup link where operations require it. See: Networks & Wi-Fi
- Firewall Routing · VPN · VLAN
- Routing, VLAN segmentation, site-to-site VPN and encrypted remote access. See: Networks & Wi-Fi
- PoE core switch Aggregation · 10G
- Powers access points, cameras, phones and readers over PoE; 10G aggregation to the servers. See: Networks & Wi-Fi
- Patch panel Cat 6A · labelled
- Copper and fibre cabling, labelled rack, patching plan handed to the client. See: Networks & Wi-Fi
- 3CX server IP PBX · SIP trunk
- Hosted or on-premises phone system, SIP trunks, call queues, IVR, number porting. See: IP telephony
- NVR recorder Recording · storage
- Sized for the number of cameras and the retention period; GDPR record of processing and signage. See: Video surveillance
- UPS Runtime · clean shutdown
- Protects the rack against power cuts and momentary outages; clean server shutdown and supervised restart. See: Managed services
- Wi-Fi access points Wi-Fi 6E / 7 · UniFi
- Coverage measured on site, one SSID per use case, isolated guest network. See: Networks & Wi-Fi
- IP cameras Dome · bullet · fisheye
- Fields of view planned when positioning each camera; dome, bullet and fisheye depending on the area. See: Video surveillance
- IP phones Yealink · Snom · mobile
- Desk phones and the 3CX mobile app, numbers ported with no interruption. See: IP telephony
- Access control Badges · intercom
- Individually assigned badges, time schedules, entry logging, IP intercom. See: Access control
- Remote monitoring VPN · alerts · backups
- Equipment monitoring over VPN, alerts, updates and tested backups. See: Managed services
01 · Services
From low-voltage cabling to day-to-day operation.
We cover the whole chain: site survey, cabling, rack installation, configuration, acceptance testing and ongoing operation. One point of contact, from the network diagram to the on-call phone.
Service 02 / 07
IP telephony
3CX phone system, hosted or self-hosted, SIP trunks, number porting, call queues, IVR, desk phones and mobile apps. Migration from your current system with no service interruption. Dedicated telephony brand: Tehran La Communication.
Service 03 / 07
IP video surveillance
Camera placement and field-of-view study, dome, bullet and fisheye cameras, recorders and storage sizing, remote viewing. GDPR-compliant signage, retention periods and record of processing activities.
Service 04 / 07
Access control & alarm
Badge readers, electric strikes and maglocks, IP intercom, per-person access rights and time schedules, entry logging. Integrated with the intrusion alarm and video.
Service 05 / 07
Managed services & maintenance
Maintenance contracts with defined service levels, equipment monitoring, backups and restore testing, asset and licence management, on-call cover under contract. A written report after every intervention.
Service 06 / 07
Supply & integration
Servers, firewalls, NAS, switches, desktops and laptops, displays and peripherals. Hardware pre-configured and documented before delivery, with an inventory handed to the client.
Service 07 / 07
Websites & applications
Multilingual brochure websites, event pages, client portals and business applications, custom-built and hosted in France. Security by design: HTTPS, strict headers, spam-protected forms, authenticated email (SPF · DKIM · DMARC). Fast, accessible, with no cookies or trackers. See our work.
02 · Method
Four steps, nothing improvised.
Every project follows the same sequence, from a single switch replacement to a multi-site rollout. That is what makes an installation something a third party can take over — even years later.
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01
Audit
Site survey, inventory of the existing setup, and building, cabling and operational constraints. Photos and measurements.
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02
Design
Network diagram, layout plan, itemised bill of materials with prices, schedule and phasing of the work.
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03
Deployment
Cabling, labelled rack installation, configuration, joint acceptance testing and handover of the technical file.
Output Rack layout & labelling · Acceptance test report · Technical file
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04
Operation
Monitoring, updates, changes to the estate and on-call cover in line with the contractual service levels.
Output Intervention report
03 · Deliverables
An installation ends with documents.
What makes an infrastructure maintainable — by a third party, or by us years later — is what is written down. Every project is handed over with its documentation.
Diagram
Installation diagram
Logical and physical architecture: links, VLANs, IP addressing plan, active equipment.
Plan
Rack layout & labelling
Rack elevation, port-by-port patching, identical labels on site and on the plan.
Spreadsheet
Priced bill of materials
Hardware, licences and labour itemised line by line, approved before anything is ordered.
Sign-off
Acceptance test report
Tests signed off with the client: Wi-Fi coverage, throughput, recording, inbound and outbound calls.
File
Technical file
Credentials, exported configurations, recovery procedures and manufacturer contacts.
Report
Intervention report
After every visit: findings, actions taken, parts replaced, next steps.
04 · References
Environments where downtime is not an option.
Diplomatic missions, multi-site hospitality groups, medical practices and regulated professions — settings where availability, traceability and confidentiality are non-negotiable.
- Embassy of LuxembourgDiplomatic mission
- GL EventsEvents Exhibitions
- Fitz GroupMulti-site restaurants
- One PlaceRestaurants
- Group Hotel Green SpiritHospitality
- LVMHFashion & Leather Goods
- Paris DescartesFaculty of Humanities and Social Sciences
- Institut Médical Sport SantéHealthcare
- Espace Médical VaubanHealthcare
- Law firmRegulated professions
- Group of Gold LineServices
- Ido CarMobility
05 · Websites
Our own sites are our best showcase.
Our brands’ websites are designed, hosted and maintained by us, to the same standard as a network: secure by design, documented, measured.
- A+Security — Mozilla Observatory
- A+Encryption — SSL Labs
- 100Accessibility & SEO — Lighthouse
- 0Cookies, trackers or third-party services
- SDI Parissdi.parisThis site: three languages, interactive diagram, connected client area.
- IDF Servicesidf.servicesMulti-skilled tradesman: interactive floor plan, three languages.
- Tehran La Communicationtehran.la3CX telephony: interactive architecture, quote form.
- Sehatpoursehatpour.comThe three-brand hub: an atom animated in real time.
A site to build, rebuild or secure? The same method as for infrastructure: needs assessment, itemised quote, documented delivery.
Request an assessment06 · Manufacturers & software vendors
A small set of vendors, mastered end to end.
We deliberately stick to a limited number of vendors we know down to the firmware, rather than a broad catalogue we would only half master.
- Ubiquiti · UniFi
- 3CX
- Apple
- Dell
- HP
- Microsoft
- Cisco
- Netgear
- Dahua
- Hikvision
- Yealink
- Snom
- Synology
- Watsoft
- OVHcloud
07 · Contact
Let’s talk about your site.
Describe the context and the scope. We will get back to you to arrange a site survey — a proper assessment is the only honest way to quote.
Service areaÎle-de-France
- 75 Paris
- 92 Hauts-de-Seine
- 93 Seine-Saint-Denis
- 94 Val-de-Marne
- 95 Val-d’Oise
- 78 Yvelines
- 91 Essonne
- 77 Seine-et-Marne
Monday – Friday: 9:00 – 19:00
Saturday: 9:00 – 18:00
24/7 on-call for clients under contract
Paris and the inner suburbs first — outer suburbs and travel beyond the region on a project basis
Online request
Our online request form is available in English: describe the need — an outage, a project, a site survey to schedule — and attach screenshots or photos if useful. The request goes straight into our tracking tool and you receive a tracking number by email, in English.
Open the request form- By phone: +33 1 45 55 05 58, Monday to Friday, 9 am to 7 pm, Saturday 9 am to 6 pm
- By email: contact@sdi.paris
- Clients under contract and regular clients: client area