Use standard SIP protocol; Provide 1 main control board slot and 4 module board slots; Compatible with mainstream IMS/NGN platforms, IPPBX and SIP servers; Support most VoIP operating system platforms, such as Asterisk, Elastix, 3CX, FreeSWITCH, Broadsoft and so on.

Use standard SIP protocol; Provide 2 main control board slots, 9 module board slots and 2 power supply slots; Compatible with mainstream IMS/NGN platforms, IPPBX and SIP servers; Support most VoIP operating system platforms, such as Asterisk, Elastix, 3CX, FreeSWITCH, Broadsoft and so on.