Features l One RS232 port for configuration l Two 10/100M Base-T connect WAN/LAN l Four E1 ports, 75W/120W l 1-4E1, provide 30-120 lines VoIP channel l Supports VLAN TAG l Supports on line software upgrade l Supports multi configure, as Console, Web, Telnet and SNMP l Supports T.30/ T.38 fax, fax translate l Supports multi PSTN signal: China NO.1, 2M E&M, PRI and R2 l Supports embed GK, performances address translate, GK verify, bandwidth management and neighbor GK etc. l Max 128ms echo cancellation l Auto-sensing dynamic buffer technology, Max 150ms, to meet bad network environment application l Management User抯 level authority, high security l Force reset factory setting, good survival l Adopt authority/verify etc. network security, supports Caller verify and B-called limited l Option input/output gain control l Billing: Cooperate with Gk-billing-N system, Max store call list 16000 entries l E1 Monitor: real time monitor each timeslot抯 calling status l Relay grouping: E1 relay resources grouping l User management: distinguish user according to number prefix l Call stat; real time check call amount, success call rate etc. l Protocol analysis: real time track protocol flow Modify as time slot and user caller ID