Wholesale SIP Trunking

Keep your PBX.
Cut your line costs in half.

Already running Cisco, 3CX, Asterisk, or FreeSWITCH? Vantact SIP trunks connect your existing PBX to the PSTN at a fraction of what legacy carriers charge. Add or remove channels instantly with no truck rolls, no contracts, and no surprises.

Get Pricing 1-800-805-3590
Trunk Configuration
SIP Trunk — Primary
sip.vantact.com · TLS/SRTP
Active
Channels
24 concurrent · scalable
24 / ∞
DIDs
15 numbers · ported
Ported
Codec
G.711 / G.729 · HD Voice
HD
50%+
Lower per-line cost
∞
Scalable channels
LNP
Full number portability
6+
PBX platforms tested

Why businesses switch to Vantact SIP

You’ve invested in a PBX that works for your organization. We’re not asking you to replace it. We’re giving it better, cheaper lines to the outside world.

Slash Line & DID Costs

Legacy carriers charge premium rates for PRI lines, DID rentals, and long distance. SIP trunks deliver the same connectivity at a fraction of the cost with no long-term contracts.

Instant Scalability

Need more capacity for a seasonal rush? Add channels in minutes through your portal. Scale back down when you don’t need them. No truck rolls, no waiting on provisioning.

Keep Your Numbers

Port your existing phone numbers to Vantact with zero downtime. Moving offices? Your numbers travel with you with no address-dependent rewiring required.

All Features Included

Caller ID, call forwarding, failover routing, voicemail, E911. Every feature comes standard on every trunk. No tiers, no feature packs, no hidden charges.

Encrypted & Reliable

TLS signaling and SRTP media encryption protect every call. Redundant infrastructure across Canadian data centres ensures carrier-grade uptime.

HD Voice Quality

Support for G.711 and G.729 codecs with HD voice capability. Crystal-clear audio that your analog lines simply can’t match.

Connect in three steps

No hardware changes. No PBX migration. Just better lines.

1

Tell us about your PBX

Share your current setup: platform, channel count, DIDs. We’ll confirm compatibility and design your trunk configuration.

2

We provision your trunks

We send you SIP credentials and connection details. Point your PBX at our servers, or we walk you through it live.

3

Start calling

Port your numbers when ready. Calls flow through Vantact’s network immediately. Your end-users notice nothing except better call quality.

Tested and certified with major platforms

Our SIP trunks are compatible with any standards-compliant SIP device or PBX. We’ve specifically tested and documented configurations for these platforms.

Cisco
Cisco UCM
CUBE / SPA
3CX
3CX
v18 / v20
GS
GrandStream
UCM Series
*
Asterisk
chan_pjsip
FS
FreeSWITCH
mod_sofia
V
Vodia
PBX

Running 3CX? Connect a Vantact SIP trunk to the system you already have, or compare 3CX with a hosted cloud PBX. Running a different platform? If it speaks SIP, we can connect it. Contact us for a compatibility check.

Legacy PRI vs. Vantact SIP

Legacy PRI

  • Fixed 23-channel bundles
  • High per-line monthly cost
  • Truck roll for changes
  • Numbers tied to address
  • Long-term contracts
  • Features cost extra

Vantact SIP

  • Scale channel-by-channel
  • 50%+ lower per-line cost
  • Self-serve portal changes
  • Numbers travel with you
  • Month-to-month billing
  • All features included

Frequently asked questions

What is SIP trunking?
SIP trunking replaces traditional PRI or analog phone lines with an internet-based connection to the public telephone network. Your existing PBX (Cisco, 3CX, Asterisk, etc.) connects to our SIP servers over your internet connection, giving you the same calling capability at significantly lower cost with greater flexibility.
Will I need to change my phone system?
No. If your PBX supports SIP (most modern systems do), you simply point it at our servers using the credentials we provide. Your phones, extensions, and internal configuration stay exactly the same. Only the “pipe” to the outside world changes.
Can I keep my existing phone numbers?
Absolutely. We handle the full number porting process. Your numbers transfer seamlessly with zero downtime. If you move offices, your numbers travel with you. They’re no longer tied to a physical address.
How many channels can I have?
There’s no fixed bundle. You can start with as few channels as you need and scale up or down at any time. Unlike PRI which forces 23-channel increments, SIP trunks let you add capacity one channel at a time.
What about call quality and reliability?
We support HD voice codecs (G.711, G.729) with TLS signaling and SRTP media encryption. Our infrastructure is hosted across redundant Canadian data centres for carrier-grade uptime. Most clients report call quality that exceeds their previous PRI lines.
Is there a contract or minimum term?
No. Vantact SIP trunks are billed month-to-month. You pay for what you use with no long-term commitments. Scale up for busy seasons, scale down when you don’t need the capacity.

Resell Our SIP Trunks

Are you an MSP, ITSP, or telecom consultant? White-label our SIP trunking infrastructure under your own brand. Set your own margins and own the customer relationship.

Join the Partner Program

Related guides

Ready to cut your line costs?

Tell us what PBX you’re running and how many channels you need. We’ll have a quote back to you within hours, not days.

Get Pricing 1-800-805-3590