Fixed caller ID
A consistent phone identity for your company’s communications.
Best for
- A single corporate number.
- Customer service centers.
- Inbound and outbound calls under one identity.
- Customers who recognize your number and can call you back.
SIP trunking
SIP trunking in Colombia
Connect your IP PBX or contact center to the public network through a licensed carrier’s own interconnection, with the channels your operation needs.
Benefits
Straight to the public network
Your calls reach the public network through our own connection with other carriers, with no middlemen.
Keep your PBX
Works with SIP-based IP PBXs and contact center platforms, without replacing what you already run.
Channels sized to you
We size concurrent calls to your actual traffic and adjust them as you grow.
Caller ID your way
Always show your corporate number or, on compatible plans, spread your outbound calls across several authorized numbers.
What’s included
SIP trunks for your PBX or contact center
An IP voice connection between your PBX and the phone network, with Colombian numbers plus national and international calling.
Concurrent channels
Sized to your peak-hour traffic.
Authentication
IP-based or registration with credentials.
Standard codecs
G.711 and others, depending on what your PBX supports.
Numbers on the trunk
Colombian local numbers nationwide, toll-free and international numbers.
Fixed or rotating caller ID
Depending on the trunk and the plan you contract.
Built for contact centers
Inbound and outbound traffic for your customer service platform.
A SIP trunk replaces the physical lines on your PBX. Each channel carries one concurrent call, so you subscribe to the number your operation uses at peak hour.
We attach your geographic numbers, toll-free lines and, if you need them, international numbers to the trunk.
SIP security, SBC and business continuity
We design protection and continuity for your trunk: managed SBC, SIP security policies and backup routes.
A session border controller (SBC) sits between your network and the trunk: it filters traffic, shields your PBX from toll fraud and attacks, and normalizes signaling. We design and deploy it around your architecture.
For critical operations we assess redundant routes and contingency plans, such as rerouting calls to another site or to mobiles.
Managed SBC
Design, deployment and operation of your voice edge.
Toll-fraud prevention
Access rules and destination restrictions.
Redundant routes
Alternate paths if the primary fails.
Failover
Rerouting to another site or to mobiles.
Assessed for each project.
Voice quality monitoring
We can build monitoring of your call quality and channel usage so you catch issues before your customers do.
We design dashboards and indicators for your operation: calls per hour, channel utilization, failed calls and audio quality, with alerts for your technical team.
Audio quality
Metrics to spot drops and choppy audio.
Channel utilization
Know when you need more capacity.
Alerts
Notifications when something looks off.
Assessed for each project.
Caller identification
Fixed or rotating caller ID: match how your calls are identified to your operation
With Hablame SIP trunks you can choose a fixed caller identity or, on compatible plans, rotate your The number the person you call sees on their screen.. Keep one corporate number for your communications or spread your outbound calls across different authorized numbers.
A flexible option for contact centers, collection agencies and sales operations looking to improve their contact rates.
Rotating caller ID
On compatible plansMore flexibility to spread your outbound calls across different authorized numbers.
Advantages
- Spread outbound traffic across several numbers.
- You don’t depend on a single number.
- Assign numbers by campaign.
- Supports your contact-rate and number-reputation strategies.
Not every SIP trunk includes rotating caller ID: it’s available on some plans and depends on the solution you contract. Rotation uses authorized numbers only and meets technical, regulatory and caller-identification requirements. It helps you manage how exposed your numbers are, but it doesn’t guarantee your calls will avoid blocking or spam filters.
Step by step
How it works
We size your channels
From your peak-hour traffic we define how many concurrent calls you need.
We provision the trunk
Authentication, codecs and numbers, matched to your PBX.
We test with you
Inbound and outbound calls before going live.
You run and grow
We add channels or numbers as your operation demands.
How it connects
How a call travels over a SIP trunk
Your phone system connects to the Hablame network over a SIP trunk and reaches the public network from there.
Step 1 of 4
Your phone system, as it is
Your PBX, cloud phone system or contact center stays the same. What changes is the path your calls take in and out.
- Your phone system, as it is. Your PBX, cloud phone system or contact center stays the same. What changes is the path your calls take in and out.
- The SIP trunk. The trunk carries your calls over the internet or a dedicated link to the Hablame network, with as many concurrent channels as your operation needs.
- Out to the public network. Hablame hands each call off to the public network, reaching landlines and mobile phones.
- Incoming calls. When someone dials one of your numbers, the call takes the reverse path and rings on your phone system.
Run the numbers
Calculator
Work out how many SIP channels you need
From the calls in your busiest hour and their average length, we estimate how many simultaneous calls your trunk should carry.
Indicative estimate only; not a quote or a technical commitment.
How we calculate it
Traffic in Erlangs = busy-hour calls × average length in minutes ÷ 60. One Erlang is one line busy for the whole hour.
Channels come from the Erlang B model: the smallest number of channels that keeps the probability of a call finding no free line at or below the level you chose.
The model assumes a call that finds no channel is lost rather than queued. If your operation uses queues, outbound campaigns or very sharp peaks, sizing changes, and we review it with you.
By profile
Who it’s for
Mid-sized company
Connect your IP PBX to the public network and retire your physical lines.
Enterprise
Trunks for contact centers and corporate PBXs, with security and continuity by design.
Integrator
A carrier trunk for the phone systems you deploy for your clients.
Developer
Connect your SIP-based voice platform to Colombian numbers and calling.
In practice
Use cases
Contact center
Trunks sized for your customer service platform’s inbound and outbound traffic.
Replacing physical lines
Your IP PBX stays as is; the lines become a SIP trunk carrying the same numbers.
Collections and accounts receivable
One fixed number your customers recognize or, on compatible plans, your collection calls spread across authorized numbers.
Telemarketing and high outbound volume
Numbers per campaign for your contact center, without depending on a single caller ID.
Several sites, one trunk
A central PBX with local numbers from each city on the same trunk.
Industries
Comparison
SIP trunk or cloud PBX: which one fits your business
Both are IP telephony. The difference is who runs the phone system.
What you get
- SIP trunk
- The voice connection for your PBX
- Cloud PBX
- The whole phone system, in the cloud
You need
- SIP trunk
- An IP PBX or a SIP-based contact center
- Cloud PBX
- Just internet and devices
Who manages the PBX
- SIP trunk
- Your team or your integrator
- Cloud PBX
- You, from the portal; the carrier maintains it
Best for
- SIP trunk
- Contact centers and companies with their own PBX
- Cloud PBX
- SMBs and companies that don’t want to maintain hardware
Customization
- SIP trunk
- Full: your PBX defines it
- Cloud PBX
- The platform’s feature set
Many companies use both: cloud PBX for the offices and a SIP trunk for the contact center.
Pricing
SIP Trunking pricing
Pricing depends on what you need. Tell us about your case and we’ll send you a quote for your operation.
Frequently asked questions
What is a SIP trunk?
It’s a connection over the internet or a data network that carries your PBX’s calls to the public network using the SIP protocol. It replaces physical lines and lets you run many concurrent calls over the same link.
How many channels do I need?
As many as the concurrent calls you have at peak hour. The calculator on this page gives you an estimate from your calls per hour and their duration; we refine it with your real data in the proposal.
How much does a SIP trunk cost?
It depends on the channels, the numbers and the destinations you call. Request a quote with your calculator result and we’ll send you a proposal.
Will it work with my PBX?
If your PBX or contact center platform supports SIP, in the vast majority of cases yes. We review the configuration with you before activation.
Do I need an SBC?
Not always. For contact centers, multi-site setups or Microsoft Teams it’s usually recommended. We assess your case and, where it makes sense, design the SBC with you.
Does every SIP trunk support rotating caller ID?
No. Rotating caller ID is available on some plans and depends on the solution you contract. An advisor will tell you which plans fit your operation.
How does rotating caller ID work?
Your outbound calls show different authorized numbers from your company instead of a single one, for example numbers per campaign. Rotation uses authorized numbers only and meets technical, regulatory and caller-identification requirements. It helps you manage how exposed your numbers are, but it doesn’t guarantee your calls will avoid blocking or spam filters.
Technical details
For your technical team.
- Protocol
- SIP over UDP or TCP
- Authentication
- IP-based or registration
- Codecs
- G.711 and others, depending on your PBX
- Compatibility
- SIP-based IP PBXs and contact center platforms, such as Asterisk
- Numbers
- Colombian local numbers nationwide, toll-free and international
- Interconnection
- CRC-approved offer (Resolutions 7987/2025 and 8115/2026)
Can’t find your question?
An advisor reviews your case and gets back to you.
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Tell us what you need
An advisor reviews your case and gets back to you with a proposal built around your operation.