Your PBX investment stays in service
The licences, extensions, dial plan and staff habits you already have keep working. Only the connection to the outside world changes.
London, Ontario
SIP trunking in London
SIP trunks for London businesses that keep their own PBX (3CX, FreePBX, Asterisk or an on-premise system): Canadian local and toll-free numbers, porting, failover routing and 9-1-1 registration, quoted per channel.
- 519 and 226 numbers, subject to availability
- Keep your existing number
- Eastern-time routing
Example
Incoming call+1 (416) 555-0198
Main menu9–17
11 — Appointments
22 — Renewals
33 — Billing
After hours
Reception queue90 s → Callback offered
AI receptionist
Voicemail to email
SIP Trunking from 3CTel is available to businesses in London in Ontario. Setup is done remotely by a specialist: numbers in the 519, 226 and 548 area codes are provisioned where available or your existing number is ported, routing follows Eastern time business hours. London sits in the 519 overlay that stretches from Windsor to Guelph; a 519 number reads as local across southwestern Ontario.
Last updated:
Why London businesses choose SIP Trunking
A London office with a PBX it likes does not need a new phone system; it needs carrier service that is reliable, priced per channel and quick to change. 3CTel connects the trunk, tests inbound and outbound with your integrator and ports numbers on a scheduled date.
You pay for concurrent calls, not phone lines
Channels are sized to your busiest hour rather than to the number of desks. Add channels for a seasonal peak and remove them afterward.
Every number you publish comes with you
Main lines, direct lines, fax numbers and toll-free numbers port to the trunk. The old service stays live until the port date the carriers confirm.
What SIP Trunking includes
Registration or IP-authenticated trunks
Trunks authenticate by SIP credentials or by your PBX’s public IP address, whichever your system and firewall arrangement suit. Both options are tested with your administrator before cutover.
Channels sized to concurrent calls
A channel is one live call. Channels are separate from DIDs: ten numbers can share four channels if that is what your traffic needs. We review your peak before setting the count.
Canadian local and toll-free DIDs
Direct inward dialling numbers in Canadian rate centres, plus toll-free numbers, delivered to your PBX with the DID in the header so your system can route each number differently.
Number porting to the trunk
Single lines, hunt groups, DID blocks and toll-free numbers port from your current carrier onto the trunk. Porting timelines are set by the carriers involved and confirmed with you before anything switches.
Local numbers and porting in London
Area codes commonly used in London: 519, 226 and 548. A new number is provisioned in one of these codes subject to what is available at the time; existing numbers are ported regardless of code and keep working on the old service until the scheduled switch.
London sits in the 519 overlay that stretches from Windsor to Guelph; a 519 number reads as local across southwestern Ontario.
Eastern time, hours and after-hours
London runs on Eastern time. Business-hours rules, holiday schedules and after-hours routing are set in that zone, and teams with customers in other provinces can route by the caller's time zone instead of the office's.
Where staff or customers sit in another time zone, the call flow can follow their hours: an Atlantic caller at 5 p.m. still reaches a person if the rule says so.
AI agents for London teams
Every 3CTel deployment in London can add AI agents: an AI receptionist for overflow and after-hours calls, a chat and SMS agent that books meetings into your calendar, and workflows that update your CRM after each conversation under rules you approve. A person is always one step away.
AI at 3CTel
AI agents, messaging, workflows, answers and insight on one phone system, with a person always available.
Learn more: AI at 3CTelAI Receptionist
Answers, understands and books — in English and French.
Learn more: AI ReceptionistAI Chat & Messaging Agent
One AI agent across website chat and business SMS that answers from your approved knowledge, books appointments and hands off to people by rules.
Learn more: AI Chat & Messaging AgentAI Workflows
After-call and after-message automation: AI reads the conversation, then does the CRM, helpdesk and calendar work — with approval rules you set.
Learn more: AI WorkflowsSIP trunking across Ontario
3CTel serves every province and territory. Related pages: Ontario, British Columbia, Alberta, Quebec, Manitoba, Nova Scotia, Toronto and Mississauga.
SIP trunking in Ontario
SIP trunking for Ontario businesses: 416, 647 and 437 numbers, Eastern-time routing, remote setup.
Learn more: SIP trunking in OntarioSIP trunking in British Columbia
SIP trunking for British Columbia businesses: 604, 778 and 236 numbers, Pacific-time routing, remote setup.
Learn more: SIP trunking in British ColumbiaSIP trunking in Alberta
SIP trunking for Alberta businesses: 403, 780 and 587 numbers, Mountain-time routing, remote setup.
Learn more: SIP trunking in AlbertaSIP trunking in Quebec
SIP trunking for Quebec businesses: 514, 438 and 263 numbers, Eastern-time routing, remote setup.
Learn more: SIP trunking in QuebecSIP trunking in Manitoba
SIP trunking for Manitoba businesses: 204, 431 and 584 numbers, Central-time routing, remote setup.
Learn more: SIP trunking in ManitobaSIP trunking in Nova Scotia
SIP trunking for Nova Scotia businesses: 902 and 782 numbers, Atlantic-time routing, remote setup.
Learn more: SIP trunking in Nova ScotiaSIP trunking in Toronto
SIP trunking for Toronto businesses: 416, 647 and 437 numbers, Eastern-time routing, remote setup.
Learn more: SIP trunking in TorontoSIP trunking in Mississauga
SIP trunking for Mississauga businesses: 905, 289 and 365 numbers, Eastern-time routing, remote setup.
Learn more: SIP trunking in MississaugaOther services for London businesses
Business phone system in London
Business phone system for London businesses: 519, 226 and 548 numbers, Eastern-time routing, remote setup.
Learn more: Business phone system in LondonBusiness VoIP in London
Business VoIP for London businesses: 519, 226 and 548 numbers, Eastern-time routing, remote setup.
Learn more: Business VoIP in LondonAI receptionist in London
AI receptionist for London businesses: 519, 226 and 548 numbers, Eastern-time routing, remote setup.
Learn more: AI receptionist in LondonContact Centre in London
Contact Centre for London businesses: 519, 226 and 548 numbers, Eastern-time routing, remote setup.
Learn more: Contact Centre in LondonRelated pages.
SIP Trunking
Carrier-grade SIP trunks for the PBX you already run — channels, DIDs and failover sized to your traffic.
Learn more: SIP TrunkingLocations
Local numbers and remote setup for businesses anywhere in Canada.
Learn more: LocationsBusiness Phone
Reliable calling with routing your team will actually use.
Learn more: Business PhoneBusiness VoIP
SIP calling that replaces landlines — or feeds the PBX you already own.
Learn more: Business VoIPFrequently asked questions.
Yes. Trunks are delivered over your internet connection to any compatible PBX; a specialist provides registration or IP-authentication details and tests with your integrator.
Each number is registered with the service address you confirm at setup, which is what dispatchers see; multi-site PBXs register an address per location.
Service in London is delivered remotely: planning by phone, configuration and testing online, desk phones shipped pre-configured. Regional pages exist for area codes, time zones and language expectations, not because service is limited to listed places.
The service address for each number is confirmed with you at setup and registered for 9-1-1; that address is what dispatchers see, so remote workers register their own location. Canadian VoIP providers must provide 9-1-1 service and explain its limitations.
Set up SIP Trunking in London.
Answer four short questions and see the plan, modules and call flow we would build, before you give us your email.