VoIP.ms SIP Trunking
VoIP.ms SIP Trunking connects a compatible IP PBX or other SIP system to VoIP.ms for inbound and outbound calling through an internet connection.
What VoIP.ms SIP Trunking is
VoIP.ms SIP Trunking connects a compatible IP PBX or other SIP system to VoIP.ms for inbound and outbound calling through an internet connection. Businesses can keep an existing PBX instead of replacing their phone system. Outbound calling can work without buying a phone number when a valid caller ID is configured, while inbound calls from the phone network require a DID routed to the SIP setup. SIP accounts support UDP or TCP connections, IP address authentication, codec, DTMF, and NAT settings. SIP-TLS and SRTP can encrypt signaling and audio. Call Detail Records and detailed logs show calls, routing, and failover events, and alternate routes can be configured when a primary route is unavailable. Channel capacity is adjustable for simultaneous calls. Compatible systems include SIP PBXs, IP phones, gateways, softphones, and SBCs. Pricing is on request; Inbound SIP Trunk is $23 a month per channel.
Good
- Works with an existing compatible PBX
- UDP or TCP SIP connections
- Optional SIP-TLS and SRTP encryption
- Adjustable channels for simultaneous calls
- 24/7 multilingual technical support
Watch out
- No free plan
- Inbound calls require a routed DID
- Pricing is generally on request
- Teams connector priced separately
Who it suits
It suits MSPs, resellers, businesses with an existing PBX, and ISPs or service providers. It also fits organizations needing adjustable SIP capacity and configurable failover.
Verdict
VoIP.ms SIP Trunking provides configurable connectivity for existing SIP systems, with encryption, logging, failover, and adjustable channels. The 23.00 USD monthly per-channel inbound plan and DID requirement should be considered when planning inbound service.
Plans and prices
From VoIP.ms SIP Trunking's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Inbound SIP Trunk | $23 a month | Inbound SIP trunk channel · Per Channel |
The facts
Each one read from VoIP.ms SIP Trunking's own pages, with the date it was checked.
What it does
- Adjustable channels
- The number of SIP trunk channels can be adjusted to support multiple simultaneous calls; the page directs customers to Sales for tailored capacity.checked 4 Oct 2026
- Call controls
- SIP account settings include IP address authentication and codec, DTMF, and NAT options.checked 4 Oct 2026
- Encryption
- SIP-TLS and SRTP encryption can be enabled for SIP signaling and audio.checked 4 Oct 2026
- Existing PBX support
- Customers can connect a compatible existing PBX without replacing their phone system.checked 4 Oct 2026
- Failover
- Customers can configure failovers for when the primary route is unavailable.checked 4 Oct 2026
- Inbound calling requirement
- Receiving inbound calls from the phone network requires a DID routed to the SIP setup.checked 4 Oct 2026
- Integrations and compatible systems
- The service can connect to SIP-compatible PBX systems, IP phones, gateways, softphones, and SBCs; VoIP.ms also provides configuration guides for third-party systems.checked 4 Oct 2026
- Intended customers
- The SIP trunking page identifies MSPs and resellers, businesses with an existing PBX, and ISPs and service providers as user groups.checked 4 Oct 2026
- Monitoring
- Call Detail Records and detailed call logs show incoming and outgoing calls, routing, and failover events.checked 4 Oct 2026
- Outbound only
- Outbound calling is available without purchasing a phone number if a valid caller ID is configured.checked 4 Oct 2026
- SIP connection options
- SIP connections can use UDP or TCP, and settings can be configured for individual SIP accounts.checked 4 Oct 2026
- Support
- VoIP.ms says technical support is available 24 hours a day, 7 days a week, in English, French, and Spanish.checked 4 Oct 2026
- What it does
- Connects an IP PBX or other compatible SIP system to VoIP.ms for inbound and outbound calling over an internet connection.checked 4 Oct 2026
The company
- Founded
- 2007checked 28 Sep 2026
- Headquarters
- Montreal, Canadachecked 28 Sep 2026
- Microsoft Teams
- VoIP.ms offers a Microsoft Teams voice connector, with pricing starting at $4.50 per license.checked 4 Oct 2026
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