I also had a PAP2T with my former VoicePulse service. Then I received the RT31P2 from Voipo. I haven't noticed any difference in reliability or voice quality. The one thing I do like is that the RT31P2 and my wireless router are both Linksys units. They stack nicely on top of each other. Although, I did add some foam extensions to the legs of the top unit to create more airflow between them.