Techniques for non-intrusive performance of diagnostic actions including actions that result in gathering of diagnostic data in response to a condition detected in a monitored system. The adjustment mechanism has a housing, a clearance portion, first and second pin members telescopically received within the housing, a telescopic engagement mechanism mounted in the clearance portion and adapted to telescopically move the pin members, and a locking mechanism adapted to lock the pin members in a rigid position. While captioned telephone service can be delivered over a single telephone line, if the assisted user has two telephone lines available for the captioning service, additional features and advantages are possible in the delivery of captioned telephone service to the user. The first and second in-silicon inductors are configured such that a differential current flowing through the first in-silicon inductor and the second in-silicon inductor flows in a same direction in corresponding turns of inductors.