CUSTOMER ADVISORY: FCC ORDER PROMPTS NEW DIALING PROCEDURES FOR CUSTOMERS IN SPECIFIC AREA CODES IN 36 US STATES

DALLAS, TX - May 20, 2021 - As a global leader in business communications, Mitel makes it our priority to ensure customers have visibility into the latest regulatory guidelines to ensure both compliance with local government requirements and a high-quality communications experience. This advisory covers new dialing procedures that will take effect in 2021 and 2022 for customers in specific area codes across the United States. On July 16, 2020, the FCC adopted an Order (FCC 20-100) approving 988 as the three-digit abbreviated dialing code to reach the National Suicide Prevention Lifeline starting July 16, 2022. The Order requires all telecommunications carriers, interconnected Voice over Internet Protocol (VoIP) providers, and one-way VoIP providers (covered providers) to make any network changes necessary to ensure that users can dial 988 to reach the existing National Suicide Prevention Lifeline by July 16, 2022. Mitel is actively working to ensure compliance of our services with this important service. In order for 988 to work properly, 10-digit local dialing must be implemented in the corresponding area codes. Customers will need to leverage 10-digit dialing to make all local calls, meaning they will need to dial area code + telephone number for all calls, even those within their same area code. This change will apply to the following area codes and states:   Beginning April 24, 2021, consumers with numbers in the area codes above should start dialing 10-digits (area code + telephone number) for all local calls. During this permissive dialing period calls dialed with just seven-digits will still be completed. Beginning October 24, 2021, all consumers with numbers in the area codes above  must dial 10-digits (area code + telephone number, or 1+10-digits) for all local calls. On and after this date, local calls dialed with only seven-digits may not be completed, and a recording may inform callers that their call cannot be completed as dialed. Callers who hear this recording must hang up and dial again using the area code with the seven-digit telephone number. What other changes need to be made? Important safety and security equipment, such as medical alert devices, and alarm and security systems must be programmed to use 10-digit dialing. Many systems operate on 10-digit dialing by default but some older equipment may still use seven-digits. Customers should contact their medical alert or security provider if they are uncertain as to whether equipment needs to be reprogrammed to accommodate the upcoming change to 10-digit local dialing.  Any needed reprogramming of alarm and home security equipment must be done during the permissive dialing period from April 24, 2021 to October 24, 2021 to avoid interruption of services. Customers should also be aware that they may need to be reprogram devices such as PBXs, fax machines, Internet dial-up numbers, fire or burglar alarm and security systems or gates, speed dialers, mobile or other wireless phone contact lists, call forwarding settings, voicemail services and other similar functions. For optimal accessibility, customers and consumers should also validate that any websites, personal and business stationery, advertising materials, personal and business checks, contact information, personal or pet ID tags, and other such items are listed with the appropriate area code. What will remain the same? •       Individual telephone numbers, including current area code, will not change •       The price of a call, coverage area, or other rates and services will not change due to the dialing change •       What is considered a local call now will remain a local call •       Customers will continue to dial 1+ the area code + telephone number for all long-distance calls •       Customers will continue to dial a prefix (such as “9”) when dialing from a multi-line telephone system (e.g., in a hotel, office building, etc.) as required •       Customers can still dial just three digits to reach 711 (relay services) and 911 (emergency services) •       If 211, 311, 411, 511, 611, 711 or 811 are currently available in a given community, customers can dial these codes with just three digits •       The National Suicide Prevention Lifeline can still be reached by dialing 1-800-273-TALK (8255) even after the 988 code is in effect Mitel customers with questions regarding this information or Mitel’s services can contact Mitel Customer Support at 1-888-322-3822 for MiCloud Business, MiCloud Connect, or Sky, Customers with MiCloud Flex, MiCloud Office, or Network Services can contact Mitel Customer Support at 1-800-722-1301. Additional information is also available on the FCC website at https:// www.fcc.gov/suicide-prevention-hotline.