I know humans can give the Call to Zetas and other 4th-density beings, but can humans give the Call to 3rd-density human friends and family and colleagues? For example, if colleagues disagree about a work issue, could one of them give the Call to the other colleagues and request a meeting on a subsconscious level to help resolve the issue?

SOZT
Telepathy of course can exist between humans and is utilized for these types of issues. The concept of the Call is a higher level being monitoring a younger soul, and responding for counseling when Called. Humans DO such service to each other, for instance parent to child, or doctor to patient, of between friends, but this is most often done via other means than telepathy. Between densities, it is the Call, within the same density, it is friendship or responsibility.
EOZT