COMsolve is the Canadian reseller of NetNumber Guaranteed Caller

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Nuisance Calls

The Canadian Anti-Fraud Center (CAFC) indicated that in 2019 only, fraud calls were responsible for losses in excess of $25 million, up to as much as $100 million dollars.  Evidence shows that Canadians continue to be bombarded by fraudulent calls more than ever before with the rate of fraud calls increasing during the COVID-19 pandemic. Numerous problems arise from these types of calls ranging from individuals not answering unknown numbers to wasting the recipient's time and at worst can lead to significant monetary loses. 

Fraud calls are carried out by fraudulent call centers located all around the world utilizing tools such as robocalls, spoofing and social engineering/manipulation. Although anyone can be a target, new Canadians, seniors and low income households tend to be more vulnerable.



Address Nuisance Calls & Regain PSTN Trust

NetNumber Guaranteed Caller STIR-SHAKEN Briefing, v1.9.5mc


In an effort to reduce fraudulent spoofed Calling Line Identity (CLI ) telephone calls to consumers, the Canadian Radio-television and Telecommunications Commission (CRTC) requires service providers to implement the STIR/SHAKEN framework (Secure Telephone Identity Revisited /Signature-based Handling of Asserted information using toKENs).

This framework highly reduces the risk of call tampering by allowing calls to be signed digitally when originating from a known and trusted caller as it flows through communication service providers.

Which Call would YOU answer?


I don’t recognize this number and I’m not going to answer this call


The odds of me answering this call are greatly enhanced


I am definitely going to answer this call for all the right reasons

COMsolve assures quick, cost-effective and expert STIR/SHAKEN implementations

COMsolve in partnership with NetNumber has a simplified Guaranteed Caller™ solution, restoring consumer confidence. Guaranteed Caller™ is a Hosted Solution which uses STIR/SHAKEN protocols to equip communication Service Providers with the ability to determine the credentials for calls being delivered by their network. This is done by digitally signing each trusted call that they deliver.

Benefits for your business

  • Guaranteed Caller™ ensures your network’s preparedness for STIR/SHAKEN prior to the mandated June 30th 2021 deadline
  • A reliable hosted STIR/SHAKEN solution, providing peace of mind
  • Centrally managed, thus reducing costs and providing affordable STIR/SHAKEN solution
  • Fully compliant with CRTC and FCC mandates for STIR/SHAKEN
  • Increased customer satisfaction by ending fraudulent Calling Line Identity (CLI) spoofing