In one embodiment, a VoIP-integrated router operable to interface with analog telephones and digital devices is provided. The VoIP-integrated router is configured to perform a method of estimating the upstream data rate of a modem, comprising transmitting packets at a known rate from the VoIP-integrated router through an upstream path for the modem to a node; during the transmission of the packets, transmitting Internet Control Message Protocol (ICMP) PING messages to the node; and based upon an examination of the PING messages and the known rate, estimating the upstream data rate of the modem.