VOIP gateway, 2 FXS voice ports, 8 10/100BaseTX port, 1 uplink 100BaseFX with single-mode optics (1310nm, connector: LC, distance 15Km), PSTN (life line) and CLI ports. For VoIP protocol types, please use one of the available suffix options - X=S for SIP, X=M for MGCP, X=H for H.323. Future protocol type change, after the product delivery, requires adding a SW KIT part number.