to fig6 in an alternate embodiment the functionality of a pcd is provided through a pcd proxy 16 located in a proxy message server 15 the proxy message server 15 operates in place of an actual pcd 11 and individual pcd proxies 16 are assigned to conventional cellular telephones 17 operating over a conventional cellular wireless network 18 as is known in the art the pcd proxy 16 accepts incoming voice messages 21 received via the voice message server 12 to the cellular telephone 17 and forwards outgoing voice messages 22 received via the cellular telephone 17 in a further alternate embodiment pcd logic 20 is integrated directly into cellular telephones 19 operating over the conventional cellular wireless network 18 with the pcd logic 20 being communicatively interfaced with the voice message server 12 over the wireless data network 14 the pcd enabled cellular telephone 19 provides conventional real time cellular telephone service while the pcd logic 20 offers time shiftable voice communications through voice messaging other configurations topologies and arrangements of pcds 11 pcd proxies 16 pcd logic 20 cellular telephones 17 and 19 voice message servers 11 proxy message servers 15 and related system components and interconnections are feasible as would be recognized.