Solution 01 / 06
3CX phone system
Hosted in the cloud or installed on your server, sized to the number of simultaneous calls, with backups, updates and monitoring. Licence and hosting managed for you.
Tehran La — Paris & Île-de-France
Your business telephony, with no downtime and no surprises.
Hosted or on-premises 3CX phone system, IP phones, SIP trunks and number porting, softphone on mobile and PC, call handling and video conferencing. One point of contact, from the audit to on-call support.
- Founded
- 2009
- Migration and porting under control
- 0 downtime
- From audit to on-call
- 1 point of contact
Typical architecture
Live
Ring on:
- SIP trunk · carrier
- Carrier selection, simultaneous channels, porting of your numbers with no interruption, additional numbers in France and abroad. See: SIP trunks & numbers
- 3CX phone system
- Hosted by us or installed on your premises: licences, backups, updates, monitoring and high availability. See: 3CX phone system
- Call handling
- Interactive voice response, call queues, opening hours and announcements, call recording, statistics: your company’s call handling, tuned to your business. See: Call handling
- IP phones
- Yealink, Fanvil, Snom: desk phones, DECT cordless, meeting rooms. Remotely provisioned, ready to plug in. See: Phones & headsets
- PC · headset
- 3CX client on Windows and Mac, wired or Bluetooth headsets, Microsoft 365 and CRM integration: click to call. See: Mobility & remote work
- Mobile softphone
- Your landline on iPhone and Android: calls, transfers and business voicemail, in the office or on the move. See: Mobility & remote work
- Video conferencing
- 3CX video meetings included, with no extra subscription: screen sharing, invitation by link, equipped meeting rooms. See: Video & collaboration
01 · Solutions
Everything you need to make calls, nothing superfluous.
We don’t resell a catalogue: we have been designing, installing and operating 3CX phone systems for years. We know every building block below right down to the phone firmware.
Solution 02 / 06
Phones & headsets
Desk phones, DECT cordless, meeting rooms and headsets: supplied, remotely provisioned and delivered ready to plug in. Your existing phones are reused where compatible.
Solution 03 / 06
SIP trunks & numbers
Carrier selection, simultaneous channels sized to your traffic, porting of your numbers with no interruption, additional numbers in France and abroad. We manage the porting with the carrier until cut-over.
Solution 04 / 06
Mobility & remote work
Your landline follows every team member: 3CX app on iPhone, Android, Windows and Mac, Bluetooth headsets, Microsoft 365 and CRM integration for one-click calling and call history.
Solution 05 / 06
Call handling
Interactive voice response, call queues, opening hours, announcements and hold music, call recording and statistics. We tune call handling to your business — not the other way round.
Solution 06 / 06
Video & collaboration
3CX video meetings included in the phone system, with no extra subscription: screen sharing, invitations by link, equipped meeting rooms (display, camera, sound bar).
02 · Who we serve
From a three-line practice to a multi-site group.
The same system, the same method; only sizing and call handling change.
Small & medium businesses
Offices, practices, agencies
Replace an old PBX or analogue lines, keep your numbers, gain mobility and video — without changing the way you work.
Multi-site
Restaurants, hotels, chains
One phone system for every location, centralised or per-site call handling, free transfers between sites, statistics per outlet.
03 · Method
A migration is prepared, not improvised.
Four steps, always in the same order, so that cut-over day is as uneventful as possible.
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01
Audit
Inventory of lines, numbers, phones and usage: who calls whom, when, and what absolutely has to keep working.
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02
Design
Dial plan, call handling, queues, channel sizing, choice of phones. Itemised quote, licence and hosting included.
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03
Migration
New system configured and tested alongside the old one, phones provisioned, porting scheduled: cut-over with no downtime, training included.
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04
Operation
Monitoring, updates, adding users and numbers, on-call support under contract. Always the same point of contact.
04 · Commitments
What we guarantee in writing.
Six commitments, written into every quote and every maintenance contract.
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Cut-over
No downtime
The new system runs in parallel before porting; your calls carry on uninterrupted.
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Numbers
Kept
Your numbers belong to you: we port them and you remain the holder of your lines.
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Quote
All-inclusive, line by line
Licence, hosting, phones, trunk, labour and training: no hidden items, no surprise extras.
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Training
Included
Hands-on training on phones and the app on cut-over day, guides handed to the team.
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Documentation
Transferable to a third party
Dial plan, exported configuration, credentials and carrier contacts handed to the client.
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Support
The same person
A new user, a greeting to change, an outage: you call the person who installed it.
05 · Network, infrastructure & web
Our SDI Paris brand.
A phone system is only as good as the network that carries it. Cabling, UniFi Wi-Fi, firewall, video surveillance, access control and websites are handled by our infrastructure brand, with the same standards and the same point of contact.
Discover SDI Paris- 3CX
- Yealink
- Fanvil
- Snom
- Jabra
- Poly
- Ubiquiti · UniFi
- Microsoft 365
- OVHcloud
06 · Quote
Let’s talk about your phone system.
How many users, how many sites, what you are missing today: tell us the essentials. We’ll call you back quickly, and the quote is free.
Service areaÎle-de-France
- 75 Paris
- 77 Seine-et-Marne
- 78 Yvelines
- 91 Essonne
- 92 Hauts-de-Seine
- 93 Seine-Saint-Denis
- 94 Val-de-Marne
- 95 Val-d’Oise
Monday – Friday: 9:00 – 19:00
Saturday: 9:00 – 18:00
contact@tehran.la
Hosted systems: monitoring and on-call support under contract, anywhere in France