The AIM-VOICE-30 contains DSPs that can support up to 30 medium-complexity voice channels when used with the Voice/WAN (VWIC-MFT) interface card. All DSP voice features such as voice activity detection, echo cancellation, and a full suite of PBX/PSTN signaling protocols are supported. When the AIM-VOICE-30 is used in a Cisco 2600 or 3660 Router, users can use voice over IP (VoIP) or voice over Frame Relay (VoFR) while freeing up the network module slot for other applications. When used with one of the various ATM network modules, voice over ATM (VoATM) and VoIP over ATM are supported.