The signaling and media interfaces provide network connectivity for signaling and media traffic. The Acme Packet 3900 has 4 SFP ports (P0-P3) which operate at 1 Gbps. Any port may be used.

The optical 1GbE ports can accept an LC fiber connector using either single mode or multimode cable. These signaling ports require a transceiver to be installed which can be of three types: Single Mode, Multi Mode, and Copper.