As the popularity of computer telephony spreads, Pervasip (formerly eLEC Communications) hopes to cash in on convergence. Through its VoX Communications subsidiary, the company provides wholesale Voice-over-Internet Protocol (VoIP) service to cable network operators, ISPs, competitive local exchange carriers (CLECs), and other resellers. Its customers, in turn, provide private or co-branded VoIP services to the residential and small business markets. VoX's service packages include such features as call return, voicemail, caller ID, and call waiting.