Buy phone numbers, set up routing, and make calls through your AI assistant.

Global SIP trunk provider

Connect your PBX, contact center, or AI voice platform to the public phone network. Make and receive calls over SIP with no per-trunk or per-channel fees.
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A SIP trunking provider that owns the network

Most SIP trunking services resell someone else's routes. didlogic operates its own Autonomous System, hardware switches, and physical points of presence, so the numbers below are ours to stand behind.

+

countries with local & toll-free numbers

%

of calls under 20ms added latency

physical PoPs on our own ASN (AS13006)

$

per-channel, per-trunk fees

How much does SIP trunking cost?

The SIP trunk itself is free, and there’s no fee for adding channels. Your cost depends on where you call, which phone numbers you need, and your account level.

Outbound calls

Calls are billed by destination, operator, and route. Check the rates for the fixed and mobile networks you call most.

Inbound numbers

Phone numbers generally carry a monthly rental and an inbound per-minute rate. Charges vary by country, number type, and account level.

Call capacity

There’s no per-channel charge. If you need more simultaneous calls or a higher rate of new calls per second, request a capacity increase.

SIP trunk compatibility and use cases

Connect your existing PBX

Connect 3CX, Asterisk, or FreeSWITCH using SIP credentials or IP authentication. Route incoming calls to your PBX and place outbound calls through didlogic.

Connect your contact center or dialer

Run inbound queues, callbacks, and outbound campaigns over SIP. To size your routes, share your destinations, peak simultaneous calls, and peak calls per second.

Connect an AI voice agent

Connect Vapi, Retell, ElevenLabs, or LiveKit for inbound and outbound calls. For transfers to a human, confirm SIP REFER is enabled and test the handoff.

Add a wholesale carrier or second route

Source DID numbers or test outbound termination alongside your current carrier. Start with one destination and compare call quality on similar traffic before moving more volume.

How it works (3 steps)

From signup to your first test call

Start with one destination and the platform you already use. A sales engineer helps you test how calls connect before you move live traffic.
  1. Step 1

    Choose what to test

    Create and verify your account. Tell us which platform you use, where you call, and whether you need inbound calls, outbound calls, or both.

  2. Step 2

    Connect your platform

    Your engineer helps arrange a test number and trial credits. Connect using SIP credentials or IP authentication and choose where inbound calls should ring.

  3. Step 3

    Place your test calls

    Check inbound routing, outbound caller ID, and two-way audio. If your setup uses keypad menus or call transfers, test those too.

How didlogic routes your calls

didlogic operates AS13006, runs its own hardware across 12 points of presence, and connects directly with carriers. On an outbound call, your platform sends the call to a didlogic SIP gateway. didlogic routes it toward the carrier serving the destination. On an inbound call, didlogic receives the call on your number and forwards it to the SIP endpoint you configure.

How didlogic routes your calls

Customer story

How Luxraine restored outbound calling on Iraq’s Zain network

Luxraine, an e-commerce platform, had trouble reaching leads in Iraq after Zain’s network filtering flagged its caller IDs. didlogic changed the termination route and checked caller IDs against live call-completion data. For that customer’s outbound calls to Zain, didlogic reported a sustained answer-seizure ratio above 60%.

60%+ sustained ASR on Zain
Iraq market recovered
Ongoing CLI rotation on the lane
SIP trunking technical specs
Spec didlogic SIP trunking
SIP transport SIP over UDP, TCP, or TLS. TLS signaling uses port 5061.
Authentication SIP credentials or IP-based authentication
Media RTP (ports 10000-20000), with SRTP for encrypted media
Codecs G.711 u-law/a-law, G.729, GSM; G.722 HD voice supported where the far-end carrier preserves it
DTMF RFC 2833 / RFC 4733 (RTP events) and in-band
Phone number coverage Phone numbers in 140+ countries. Available number types, including local and toll-free, vary by market.
Security controls Per-trunk IP restrictions. Account-wide limits on the per-minute rate, call duration, and simultaneous calls.
Network didlogic operates AS13006 and runs its own hardware across 12 points of presence.
Capacity No per-channel or per-trunk fees. Concurrent channels and CPS raised on request
Outbound features Caller ID rotation, answering machine detection (AMD), and mobile number lookups (HLR) via API. Caller ID availability depends on the destination and route.
Call control Forward inbound DIDs to a SIP URI. Transfer calls to another endpoint using SIP REFER with account activation and support from your platform.
API REST API for SIP trunk provisioning, IP allowlists, CDRs, ASR reports, and HLR lookups
Regional availability Licensed local voice is available in selected markets. Confirm emergency calling, address registration, and regional processing requirements for your deployment.

Secure and manage your SIP trunks

Use TLS for SIP signaling and SRTP for audio on supported connections. Restrict a trunk to authorized IP addresses and set limits on concurrent calls, call duration, and cost. Separate trunks let you apply different controls to different systems or traffic types.

didlogic holds ISO/IEC 27001:2022 and ISO 9001:2015 certifications. Review the certification scope and security documentation as part of your supplier assessment.

View security and certifications →

Secure and manage your SIP trunks

SIP trunking FAQs

What is SIP trunking, and do I need a PBX to use it?

A SIP trunk connects your phone system or voice application to the public phone network so it can make and receive calls. A PBX handles extensions, queues, and call flows. You can connect an existing PBX such as 3CX or Asterisk, or use a SIP-compatible contact center, dialer, or AI voice platform without buying a separate PBX.

How much does didlogic SIP trunking cost? Is there a monthly minimum?

There are no per-trunk or per-channel fees. On the published plans, Core has a $20 minimum monthly commitment and Plus has a $100 minimum. Outbound rates vary by destination, operator, and route. For inbound service, check the number rental, inbound minute rate, and any applicable setup fees. Per-second billing is available from Plus. Compare account levels · View outbound call rates · View number pricing

Can I get a local number if my company is registered in another country?

Eligibility depends on the country and number type. A geographic, national, mobile, or toll-free number can have different registration requirements, even within the same country. Tell us where your company is registered, which country or city you need, and whether you need inbound calls, outbound calls, or both. We can then check availability and the documents required for that number. Check number coverage

Can I use my existing number as caller ID when calling from abroad?

On Plus and higher account levels, you can request to present a number you own after verification. Whether it displays depends on where the call originates, the destination network, and the route. Before launch, share the number you want to display and place a test call to the fixed or mobile networks your customers actually use. Check caller ID availability

Can I keep my current number and route calls to my SIP platform?

Eligible numbers can be ported to didlogic and routed to your PBX, contact center, or SIP endpoint. Porting depends on the country, number type, and current provider. If you plan to forward calls from your current carrier instead, test two details before cutover: whether your platform receives the original caller’s number and whether it can identify which of your numbers was dialed. Check porting eligibility

How do I connect my PBX using SIP credentials or a static IP?

didlogic supports SIP registration with credentials and IP-based authentication for systems with a static IP. For example, to connect 3CX using IP authentication, provide Support with your PBX’s static IP so the SIP account can be configured. Use the current gateway list when setting up your firewall, then test inbound and outbound calling. 3CX setup guide · Current SIP gateways

Can I connect Retell, Vapi, or ElevenLabs for inbound and outbound calls?

Yes. Connect your platform over SIP, route an inbound number to the agent’s SIP endpoint, and configure outbound calling for the destinations you need. Confirm caller ID separately for each market. If your agent transfers calls to a person, check that SIP REFER is enabled on your didlogic account and test the handoff on your platform. Explore AI voice integrations · Vapi setup guide

How many simultaneous calls can I run, and how is that different from CPS?

Concurrent channels determine how many calls can be active at once. Calls per second (CPS) measure how quickly your system can start new calls. For example, a dialer may need to start 10 calls per second while supporting 200 active calls. Share both figures and your destination mix so an engineer can confirm capacity for your test and for production. Discuss capacity

Does didlogic support predictive dialers and short-duration calls?

Yes, subject to a traffic and route review. Share the destinations, expected monthly minutes, average call duration, peak CPS, and simultaneous calls. Ask for the billing increment and any short-call conditions for the proposed route. These matter particularly for dialers, automated notifications, and intercom traffic, where many calls may last only a few seconds. Explore dialer and short-duration routes

Can I test a SIP trunk before moving traffic from my current carrier?

Yes. Start with one destination or test number alongside your existing carrier. The published Promo plan has a $0 monthly commitment, two outbound channels, and 30-day validity, after which the account moves to Core. Account verification is required. A sales engineer can confirm the test number, credits, and route available for your use case. Test caller ID, two-way audio, time to ring, and any transfers before moving live traffic. Review plan terms · Request a test trunk

What should I send to get an accurate SIP trunking quote?

Send your business website, where calls originate, destination countries, expected monthly minutes, and whether you call fixed or mobile numbers. Include any local-number or caller ID requirements, your platform, peak simultaneous calls, and peak CPS if known. For a like-for-like comparison, ask for number rental, setup charges, inbound and outbound rates, billing increments, and the monthly minimum in the same quote. Request a SIP trunking quote

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