3COM 3C13788A 1-Port Voice Multi FUNCTION Interface Module

3Com Router Channelized T1 Voice MIM 3C13788 Product Overview Technical Information Application/Usage:     Data Networking Interfaces/Ports Interfaces/Ports:     1 x T1 WAN Interfaces/Ports Details:     1 x T1 WAN Media & Performance Data Transfer Rate:     1.54 Mbps T1 Miscellaneous Additional Information:     Device Type: Voice Interface Module System Requirements:     One Expansion Slot Compatibility:     3COM Router 5012, 5232, 5642 and 5682