premier voice call to Yekaterinburg Russia

I am an Xfinity voice premier customer in New Hampshire experiencing some type of routing failure or connection failure. When calling the Yekaterinburg region of Russia (011 7 343), the line pauses for several seconds before giving a fast busy signal.  This began on September 14, 2026.  Maybe open a ticket with the VoIP Translations / Network Operations Center (NOC) to inspect and refresh the international route table for my region." or let me know if for example Rostelecom in Russia is blocking calls now from the United States.