wish help you to fix your issue I try to add every User of an AD with a special description to a group wich contains the Department Attribute (up to 3 digits) as a suffix. , If I understand your right, try this code:
this will help Solution: Valid answers to a=recvonly are a=sendonly and a=inactive. RFC 3264: " If a media stream is listed as recvonly in the offer, the answer MUST be marked as sendonly or inactive in the answer. "
Add description attribute to enum and read this description in TypeScript