Due to the lack of paralinguistic information, politeness gains a considerable significance in telephone conversations (TCs). The use of politeness strategies can help interlocutors promote and/or maintain social harmony in telephone interactions. Using the Rapport Management Model proposed by Spencer-Oatey (2008), this study intended to primarily investigate the fundamental closing structures of TCs in Persian and English. Furthermore, it examined the effect of two contextual variables and time availability on the closing pattern sand length of TCs. To this aim, 30 English natives, 30 Persian natives, and 30 Persian EFL learners were selected. A Discourse Completion Test (DCT) of 12 scenarios was developed considering contextual variables and time limitation. The obtained results demonstrated that the CPT (closing implicative environment + preclosing + terminal components) closing pattern may not be applicable in every context. Furthermore, telephone conversers change the pattern and length of TC closing part to maintain their rapport based on the aforementioned variables. The findings of the present study can guide the researcher to follow more complete and perfect politeness models.
