telnet 192.168.1.1
command) to connect to the router's IP. Common default login pairs for ZTE devices include: telnet zte f6640
sendcmd 1 DB p WLCInfo sendcmd 1 DB set WLCInfo 0 led_onoff 0 sendcmd 1 DB save telnet 192
Enabling Telnet on the ZTE F6640 provides robust, direct control over your GPON ONT, enabling advanced customization beyond the web interface. However, because of the security risks associated with Telnet, it should be used carefully and disabled once configuration is complete. direct control over your GPON ONT