Why SIP Trunking?

SIP Trunking provides efficient and cost-effective solution to businesses to replace traditional phone lines with DIDforSale’s Low Cost SIP Trunking Solution. Besides saving thousands on local and long distance calls, SIP Trunking enables you to provide higher standard of service which is extremely flexible and highly scalable.

SIP Trunking Benefits:

  • Work with any SIP Compatible PBX or SIP Trunking Softswitch.
  • No Need to invest in expensive TDM equipments.
  • Reduce monthly expenses
    • Low monthly rates, per channel or per minute.
    • Pay for trunks you use.
    • Single internet connection works for data and voice.
  • Best for organization at multiple locations.
  • Redundancy with multiple SIP Trunking Services providers.
  • Flexible termination of calls to preferred providers.

What's The Difference Between
Hosted PBX & SIP Trunking?

Hosted PBX is a fully managed cloud based phone system,
while SIP Trunking connects a business's on-premises PBX (private branch exchange)to the internet for voice connectivity.

DIDforSale SIP Trunking Features


Add and remove SIP Trunks per your business requirement on the fly. There are no commitments!

Easy Integration

Have a PBX system? No worries our system allows you to integrate our SIP Trunks with your PBX.

Codec Support

Get flexibility and quality. We support G.711, G.729, u-Law, a-Law Codecs for your SIP Trunks

Number Porting

Bring your phone numbers when changing your phone service provider. We port your existing number.

Phone Number

With Phone Numbers from 13,000+ rate centers we have largest coverage in USA & Canada

Tollfree Number

Get access to numbers from US & Canada. Unlimited simultaneous calls at low per minute cost.


Phone Numbers from DIDforSale support E911 (enhanced 911) service.


Our Phone Numbers are equipped with CNAM feature to pass Caller ID Name.

Account Management

Our web portal enables easy management for your SIP Trunks, Phone Numbers, CDR’s etc.

Compatible PBXs

Why Choose DIDforSale
as your SIP Provider?

Simple Platform

Our easy to use web portal gives full control to our clients to configure, manage, and scale their telephone system per their business requirement.

Simple Pricing - No Contract

Choose a plan that fits your business needs. Our metered or flat rate plan are designed to provide you with most flexible options and there is no contract.

Flexible & Reliable

With 99.99% uptime our system is extremely reliable and gives to flexibility to expand or reduce the telephone lines on the fly through webportal.

Unrivaled US Coverage:
With 13,000+ Rate Centers we have largest coverage in United States, ensuring your nationwide connectivity.

How It Works?

Configure Your SIP Trunks.

Our SIP Trunks are compatible with most SIP based PBX, Business Phone Systems and Devices.

However, it’s essential to note that compatibility can depend on various factors, including the specific configuration of your PBX or device and the SIP trunk settings provided by DIDForSale. Therefore, it’s advisable to consult with DIDForSale’s technical support or documentation to ensure proper configuration and compatibility with your particular equipment or software.

See Documentation

Sip Trunking your stepping stone to higher productivity

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Frequently Asked Questions

SIP trunking works by using an internet connection to establish a connection between your PBX and the PSTN. Instead of traditional phone lines, it uses SIP, a signaling protocol, to set up and manage communication sessions, including voice, video, and instant messaging.
We do allow call center and calling card traffic. We allow unlimited inbound minutes on our SIP trunks. You can receive as many calls you want. However for termination our unlimited SIP trunks are only for normal office use. If you want to use for call center type of traffic, we do have low per minute termination.
Yes, when you purchase SIP trunking from DIDForSale you get free technical support in configuring the system and setting up a dial plan. We want you to have the best experience with VoIP technology, so we can even provide free consultancy on new solutions or security you are dealing with.
No, there is no minimum commitment! With the use of automation and technology, we have automated everything. That way we save lot on hiring expensive sales and support staff and automation allow us to sell every one, big or small. In your account portal you can do everything on your own, from purchasing a SIP Trunk, buying local phone number to routing and configuration.
You'll typically need a compatible PBX or VoIP system and an internet connection. Some businesses may require a Session Border Controller (SBC) to manage and secure the connection between their network and the SIP provider.

What Customer Say

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