What type of call occurs when dialing the ten-digit number of the 911 trunk directly?

When dialing the ten-digit number of the 911 trunk directly, the type of call that occurs is essentially an anonymous call. This is because the caller may not provide identification or location information typically captured when dialing 911 through the standard emergency system. In many cases, automatic location identification (ALI) and automatic number identification (ANI) may not function properly for such calls, potentially leaving dispatchers without essential information to respond effectively.

Additionally, while the other types of calls have specific characteristics (like being verified calls, prank calls, or recorded calls), those do not apply here. A verified call would imply that the identity and intent of the caller are established, which is not the case with a direct trunk call. A prank call is characterized by its intent to mislead or annoy, and while a recorded call may be recorded for quality assurance or assessment, those definitions don't encompass the nuances of a call made directly to emergency services without going through the proper channels.