Fixed Interfaces / Module Slots : 1 x LAN/WAN Expansion Slot, 1 x Octaplane Stack Fabric Slot, Analog ISDN BRI/PRI T1/E1, Gigabit Ethernet IP (H.323 or SIP) over Frame Relay or PPP Telephony Media Modules : 4 Media Module Slots IP WAN Modules : PoE Module : Capacities : With S8300 up to 450 endpoints, Up to 450 trunks Telephone Compatibility : 6200/2500 Series Analog Phones, 6400/8400 Series Digital Phones, 4600 Series IP Phones, 9600 Series IP Phones, 1600 Series IP Phones, IP Softphone R2.0+ Power : 100?240 VAC, 50?60 Hz, 5A Max Dimensions : 48.26 x 45 x 8.8 cm Weight : 12 kg