... EX1300-A IPPBX with Analog portsEX1300-4AEX1300-4A IPPBX device, support up to 300 users, default 100 users, SIP supported, power. 2FXS ... 2FXO configuration or 4FXO optional. EX1300-8AEX1300-8A IPPBX device, support up to 300 users, default 100 users, SIP supported, power. 4FXS ... SIP supported, AC power. EX1300-1EEX1300-1E IPPBX device, support up to 300 users, default 100 users, and 1E1 Ports, SIP ...